CBSE Class 10 Science Magnetic Effects of Electric Current MCQs

Refer to CBSE Class 10 Science Magnetic Effects of Electric Current MCQs provided below. CBSE Class 10 Science MCQs with answers available in Pdf for free download. The MCQ Questions for Class 10 Science with answers have been prepared as per the latest syllabus, CBSE books and examination pattern suggested in Class 10 by CBSE, NCERT and KVS. Multiple Choice Questions for Chapter 13 Magnetic Effects of Electric Current are an important part of exams for Class 10 Science and if practiced properly can help you to get higher marks. Refer to more Chapter-wise MCQs for CBSE Class 10 Science and also download more latest study material for all subjects

MCQ for Class 10 Science Chapter 13 Magnetic Effects of Electric Current

Class 10 Science students should refer to the following multiple-choice questions with answers for Chapter 13 Magnetic Effects of Electric Current in Class 10. These MCQ questions with answers for Class 10 Science will come in exams and help you to score good marks

Chapter 13 Magnetic Effects of Electric Current MCQ Questions Class 10 Science with Answers

Question. A tesla is equivalent to a
(a) newton per coulomb
(b) newton per ampere-meter
(c) ampere per newton
(d) newton per ampere-second
Answer : B

Question. Which of the following correctly describes the magnetic field near a long straight wire?
(a) The field consists of straight lines perpendicular to the wire.
(b) The field consists of straight lines parallel to the wire.
(c) The field consists of radial lines originating from the wire.
(d) The field consists of concentric circles centred on the wire.
Answer : D

Question. Magnetic field due to a current through a straight conductor depends on
(a) current
(b) distance from the wire
(c) Both (a) and (b)
(d) cross-sectional area of wire
Answer : C

Question. The effective length of the magnet is
(a) the complete length of the magnet
(b) the distance between the two poles of the magnet
(c) the half of the length of the magnet
(d) the square of the length of the magnet
Answer : B

Question. The magnetic field at a distance r from a long wire carrying current I is 0.4. Tesla. The value of magnetic field at a distance 2r is
(a) 0.2 T
(b) 0.1 T
(c) 0.15 T
(d) 1 T
Answer : A

Question. A vertical wire carries a current upward. The magnetic field north of the wire will be directed
(a) upward
(b) eastward
(c) westward
(d) northward
Answer : C

Question. A positively-charged particle (alpha-particle) projected towards west is deflected towards north by a magnetic field. The direction of magnetic field is
(a) towards south
(b) towards east
(c) downward
(d) upward
Answer : D

Question. By removing the inducing magnet, the induced magnetism is
(a) Finished after some time
(b) Finished just after
(c) Not finished for a long time
(d) Not changed
Answer : B

Question. Which of the following processes will not produce new magnetic poles?
(a) cutting a bar magnet in half
(b) turning on a current in a solenoid
(c) running a current through a straight wire
(d) placing an iron rod in contact with a magnet
Answer : C

Question. Which of the following is not true
(a) Induction precedes attraction
(b) We cannot isolate a single pole
(c) We can magnetise an iron ring
(d) A permanent magnet retains its magnetism even when heated on a flame.
Answer : D

Question. A ship is to reach a place 8c south of west. In what direction should the ship be steered if declination at the place is 18c west?
(a) West of magnetic south at angle 64c
(b) East of magnetic north at angle 64c
(c) West of magnetic south at angle 50c
(d) East of magnetic north at angle 18c
Answer : A

Question. Which of the following statement is not correct about two parallel conductors carrying equal currents in the same direction?
(a) Each of the conductors will repel each other.
(b) The two conductors will repel each other.
(c) The are concentric lines of force around each conductor
(d) Each of the conductors will move if not prevented from doing so
Answer : B

Question. A small magnet is placed perpendicular to a uniform magnet field. The forces acting on the magnet will result in
(a) Rotational motion
(b) Translatory motion
(c) No motion at all
(d) Translational and rotational motion both
Answer : A

Question. Which one of the following substances is the magnetic substances?
(a) Mercury
(b) Iron
(c) Gold
(d) Silver
Answer : B

Question. Three plotting compasses are placed close to a solenoid carrying a current. How many of the compass needles will change direction, if the current through the solenoid is increased? (Ignore the effect of the earth’s magnetic field).
(a) Only 1 compass needle
(b) 2 compass needle
(c) 3 compass needle
(d) None of the above
Answer : D

Question. The magnetic field at a point due to a current carrying
conductor is directly proportional to the
(a) current flowing through to the
(b) Distance from the conductor
(c) Voltage across the conductor
(d) Resistance of the conductor
Answer : A

Question. Which of the following determines the direction of magnetic field due to a current carrying conductor?
(a) Faraday’s laws of electromagnetic induction
(b) Fleming’s left-hand rule
(c) Lenz’s rule
(d) Maxwell’s cork screw-rule
Answer : D

Question. Choose the correct option (s).
The magnetic field inside a long straight solenoidcarrying current
(a) is zero
(b) decreases as we move towards its end.
(c) increases as we move towards its end.
(d) is the same at all points.
Answer : D

Question. To avoid risk of electrical shock, which phenomena is used?
(a) Over loading
(b) Short circuiting
(c) Earthing
(d) None of these
Answer : C

Question. Force on a current carrying conductor in a magnetic field depends on
(a) direction of the current
(b) direction of magnetic field
(c) Both (a) and (b)
(d) length of the wire
Answer : C

Question. When the bars of bismuth are placed between the magnetic poles they set their length
(a) perpendicular to the lines of force
(b) along the lines of force
(c) neither perpendicular nor along the lines of force
(d) In any direction
Answer : A

Question. The magnetic lines of force, inside a current carrying solenoid, are
(a) along the axis and are parallel to each other
(b) perpendicular to the axis and equidistance from each other
(c) circular and they do not intersect each other
(d) circular at the ends but they are parallel to the axis inside the solenoid.
Answer : A

Question. Magnetic lines do not intersect on one-another because
(a) they are at a distance
(b) they are in the same direction
(c) they are parallel to another
(d) at the point intersection there will be two direction of the magnetic force which is impossible
Answer : D

Question. Who has stated the Right hand Thumb Rule?
(a) Orsted
(b) Fleming
(c) Einstein
(d) Maxwell
Answer :  A

Question. The strength of magnetic field inside a long current carrying straight solenoid is
(a) more at the ends than at the centre
(b) minimum in the middle
(c) same at all points
(d) found to increase from one end to the other
Answer :   C

Question. The factors on which one magnetic field strength produced by current carrying solenoids depends are
(a) Magnitude of current
(b) Number of turns
(c) Nature of core material
(d) All of the above
Answer :   D

Question. Commercial electric motors do not use
(a) an electromagnet to rotate the armature
(b) effectively large number of turns of conducting wire in the current carrying coil
(c) a permanent magnet to rotate the armature
(d) a soft iron core on which the coil is wound
Answer :   C

Question. In Fleming’s right hand rule direction in induced current is given by:
(a) thumb
(b) middle finger
(c) first finger
(d) none of these
Answer :   B

Question. We can induce the current in a coil by
(a) moving the coil in a magnetic field
(b) by changing the magnetic field around it
(c) by changing the orientation of the coil in the magnetic field
(d) All of above
Answer :  A

Question. A magnetic field directed in north direction acts on an electron moving in east direction. The magnetic force on the electron will act
(a) vertically upwards.
(b) towards east.
(c) vertically downwards.
(d) towards north.
Answer :   C

Question.   Magnetic effect of current was discovered by
(a) Oersted
(b) Faraday
(c) Bohr
(d) Ampere
Answer :  A

Question. No force acts on a current carrying conductor when it is placed-
(a) perpendicular to the magnetic field
(b) parallel to the magnetic field
(c) far away from the magnetic field
(d) inside a magnetic field
Answer :  B

Question. Which of the following statement is not correct about the magnetic field?
(a) Magnetic field lines form a continuous closed curve.
(b) Magnetic field line do not interest each other.
(c) Direction of tangent at any point on the magnetic field line curve gives the direction of magnetic field at that point.
(d) Outside the magnet, magnetic field lines go from South to North pole of the magnet.
Answer :  D

Question. In the magnetic field the force acting on the current carrying conductor will be maximum :
(a) If conductor is parallel to the field
(b) If conductor is perpendicular to the field
(c) If conductor subtends an angle of 60Deg with the field
(d) If conductor subtends an angle of 45deg with the field
Answer :  A

Question. The direction of induced current is given by
(a) Fleming’s right hand rule
(b) Fleming’s left hand rule
(c) Right hand thumb rule
(d) Left hand thumb rule.
Answer :  A

Question. Electric supply in homes and factories is:
(a) 220V and 400V
(b) 400V and 220V
(c) 220V and 440V
(d) 440V and 220V
Answer : C

Question. AC generator works on the principle of
(a) ohnis law
(b) Joule’s law of heating
(c) faraday’s law of electromagnetic induction.
(d) none of the above
Answer :  C

Question. Induced current flows through a coil 
(a) for more than the period during which flux changes through it.
(b) for less than the period during which flux changes through it.
(c) only for the period during which flux changes through it.
(d) none of the above.
Answer : C

Question. If the force exerted on a current carrying wire placed in a magnetic field is zero, then the angle between wire and the direction of magnetic field is 
(a) 45°
(b) 60°
(c) 90°
(d) 180°
Answer : D

Question. A rectangular coil of copper wires is rotated in a magnetic field. The direction of the induced current change once in each 
(a) two revolutions
(b) one revolution
(c) half revolution
(d) one-fourth revolution.
Answer : C

Question. Four students plotted the sketch of the patterns of magnetic field lines representing the magnetic field around a current carrying straight wire as shown in figures P, Q, R and S. Which one of the following sketches is correct? 
CBSE Class 10 Science Magnetic Effects of Electric Current MCQs

(a) P
(b) Q
(c) R
(d) S
Answer : D

Question. Which of the following properties of a proton can change while it moves freely in a magnetic field? 
(a) Mass
(b) Speed
(c) Momentum
(d) Kinetic energy.
Answer : C

Question. On which of the following does not exert any force when kept in uniform magnetic field? 
(a) Moving magnet
(b) Moving charge
(c) Stationary magnet
(d) Stationary charge
Answer : D

Question. The direction of magnetic field around a straight conductor carrying current can be determined by 
(a) Fleming’s left hand rule
(b) Lenz’s law
(c) Right hand thumb rule
(d) Fleming’s right hand rule.
Answer : C

Question. When is the force experienced by a currentcarrying conductor placed in a magnetic field largest? 
(a) At 30°
(b) at 60°
(c) At 45°
(d) at 90°
Answer : D

Question. An electric motor is a device which transform : 
(a) mechanical anergy to electrical energy
(b) heat energy to electrical energy
(c) electrical energy to heat energy
(d) electrical energy to mechanical energy.
Answer : D

Question. An electric charge in uniform motion produces 
(a) an electric field only
(b) a magnetic field only
(c) both electric and magnetic fields
(d) no such field at all
Answer : C

Question. Three rings P, Q and R are dropped at the same time over identical hollow magnets as shown here. 
CBSE Class 10 Science Magnetic Effects of Electric Current MCQs

Which of the following describes the order in which the ring P, Q and R reach the bottom of the magnet?
(a) They arrive in the order, P, Q, R.
(b) They arrive in the order P, R, Q
(c) Rings P and R arrive simultaneously, followed by Q
(d) Rings Q and R arrive simultaneously, followed by P.
Answer : B

Question. Which of the following instruments works by electromagnetic induction? 
(a) Dynamo.
(b) Moving coil galvanometer.
(c) Telephone receiver.
(d) Simple motor.
Answer : A

Question. Choose the incorrect statement from the following regarding magnetic lines of field: 
(a) The direction of magnetic field at a point is taken to be the direction in which the north pole of a magnetic compass needle points.
(b) Magnetic field lines are closed curves.
(c) If magnetic field lines are parallel and equidistant, they represent zero field strength.
(d) Relative strength of magnetic field is shown by the degree of closeness of the field lines.
Answer : C

Question. A positively-charged particle (alphaparticle) projected towards west is deflected towards north by a magnetic field. The direction of magnetic field is 
(a) towards south
(b) towards east
(c) downward
(d) upward
Answer : D

Question. The phenomena of electromagnetic induction is 
(a) the process of charging a body
(b) the process of generating magnetic field due to a current passing through a coil
(c) producing induced current in a coil due to relative motion between a magnet and the coil
(d) the process of rotating a coil of an electric motor.
Answer : C

Question. Direction of rotation of a coil in electric motor is determined by
(a) fleming’s right hand rule
(b) fleming’s left hand rule
(c) faraday law of electromagnetic inductors
(d) None of above
Answer :  B

Question. Which color wire is used for earthing ?
(a) Red
(b) Blue
(c) Green or yellow
(d) none of these
Answer :  C

Question. Who has stated the Right hand Thumb Rule?
(a) Orsted
(b) Fleming
(c) Einstein
(d) Maxwell
Answer : D

Question. What happens to the current in short circuit?
(a) reduces substantially
(b) does not change
(c) increases heavily
(d) vary continuously
Answer :  C

Question : In India the potential difference between live wire and neutral wire is
(a) 240 V
(b) 250 V
(c) 280 V
(d) 220 V.
Answer :  D

Question. Which among of these are the main characteristics of fuse element?
(a) High conductivity
(b) low melting point
(c) do not bum due to oxidation
(d) All of the above
Answer :  D

Question. On increasing number of turns magnetic field of a solenoid:
(a) Decrease
(b) Increase
(c) no effects
(d) none of these
Answer : B

Question. The magnetic field is the strongest at
(a) middle of the magnet.
(b) north pole.
(c) south pole.
(d) both poles.
Answer :  D

Question. Alnico is an alloy of:
(a) AL, Co, Fe
(b) Mg, Al, Zn, Co
(c) Co, Ni, Al
(d) Al, Ni, Sn
Answer :  C

Question. The strength of magnetic field around a current carrying conductor is
(a) inversely proportional to the current but directly proportional to the square of the distance from wire.
(b) directly proportional to the current and inversely proportional to the distance from wire.
(c) directly proportional to the distance and inversely proportional to the current
(d) directly proportional to the current but inversely proportional the square of the distance from wire.
Answer :  B

Question. The mains power supply of a house is through a 2A fuse. How many 50W bulbs can be used in this house at the normal voltage?
(a) 7
(b) 8
(c) 5
(d) 6
Answer :  B

Question. A magnetic field line is used to find the direction of:
(a) South-north
(b) A compass needle
(c) A bar magnet
(d) Magnetic field
Answer :  D

Question. The most suitable material for making the core of an electromagnet is:
(a) Soft iron
(b) Brass
(c) Aluminium
(d) Steel
Answer :  A

Question. Which of the given correctly describes the magnetic field near a long straight wire?
(a) The field consists of straight lines perpendicular to the wire
(b) The field consists of straight lines parallel to the wire
(c) The field consists of radial lines originating from the wire
(d) The field consists of concentric circles centred on the wire
Answer :  D

Question. Current that does not change its direction after equal intervals of time is called:
(a) direct current
(b) indirect current
(c) Alternating current
(d) Static electricity
Answer :  A

Question. The front face of a circular wire carrying current behaves like a north pole. The direction of current in this face of the circular wire is:
(a) Clockwise
(b) Downwards
(c) Anticlockwise
(d) Upwards
Answer :  C

Question. A rectangular coil of copper wire is rotated in a magnetic field) The direction of induced current changes once in each:
(a) Two revolutions
(b) One revolution
(c) Half revolution
(d) One-fourth revolution
Answer :  C

Question. The frequency of direct current (DC) is:
(a) 0 Hz
(b) 50 Hz
(c) 60 Hz
(d) 100 Hz
Answer :  A

Question. At the time of short circuit the current in the circuit.
(a) reduces substantially
(b) does not change
(c) increases heavily
(d) very continuously.
Answer :  C

Question. Circuit Breaker Device which can be used in place of fuse in domestic electric wiring is called:
(a) CBD
(b) DCB
(c) MCD
(d) MCB
Answer :  D

Question. An electric motor is a device which transforms:
(a) Mechanical energy to electrical energy
(b) Heat energy to electrical only
(c) Electrical energy to heat energy only
(d) Electrical energy to mechanical energy
Answer :  D

Question. A TV set consumes an electric power of 230 watts and runs on 230 volts mains supply. The correct fuse for this TV set is:
(a) Five A
(b) Three A
(c) One A
(d) Two A
Answer :  D

Question. The magnetic field inside a long straight solenoid carrying current:
(a) Is zero
(b) Decreases as we move towards its end
(c) Increases as we move towards its end
(d) Is the same at all points
Answer :  D

Question. How many magnetic poles are there in a current carrying solenoid?
(a) two
(b) four
(c) one
(d) six
Answer : A

 

Fill in The Blank

Question. In a magnetic field pointing away from you, an electron traveling to the right will experience a force in the ......... direction.
Answer : Downward

Question. Field lines are used to represent a ..........
Answer : Magnetic field

Question. In our houses we receive AC electric power of ......... with a frequency of .........
Answer : 220V, 50 Hz.

Question. The N-pole of a compass points to the .......... pole of a permanent magnet.
Answer : S

Question. Field lines are shown closer together where the magnetic field is .........
Answer : Greater

Question. A metallic wire carrying an electric current has associated with it a .......... field.
Answer : Magnetic

Question. Magnetic field lines emerge from the .......... pole of a solenoid or a permanent magnet.
Answer : North

Question. The phenomenon of production of back e.m.f. in a coil due to flow of varying current through it is called ...........
Answer : Self-induction

Question. A Permanent behaves like a solenoid because both contain currents in the form of ..........
Answer : Circles

Question. Field lines come out of ......... pole while enters from ........... pole.
Answer : North, South

 

True/False

Question. The induced e.m.f. depends only the turns of the coil.
Answer : False

Question. Fleming’s left hand rule helps us to find the direction of the induced current.
Answer : False

Question. The direction of force on a current carrying conductor placed in a magnetic field cannot be reversing the direction of magnetic field.
Answer : False

Question. The magnitude of induced current can be decreased by increasing the area of cross. section of coil.
Answer : False

Question. An electron does not suffer any deflections while passing through a region. This makes sure that there is no magnetic field in that region.
Answer : True

Question. Energy associated with an electric field is analogous to potential energy whereas the energy associated with the magnetic field is analogous to kinetic energy.
Answer : True

Question. A magnetic field exists in the region surrounding a magnet, in which the force of the magnet can be detected.
Answer : True

Question. An electric generator works on the principle of electromagnetic induction.
Answer : True

 

Assertion and Reason

DIRECTION : In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
(a) Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
(b) Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
(c) Assertion (A) is true but reason (R) is false.
(d) Assertion (A) is false but reason (R) is true.
(e) Both Assertion and Reason are false.

Question. Assertion : An induced e.m.f. appears in any coil in which the current is changing.
Reason : Self induction phenomenon obeys Faraday’s law of induction.
Answer : B

Question. Assertion : A solenoid tends to expand, when a current passes through it.
Reason : Two straight parallel metallic wires carrying current in same direction attract each other.
Answer : D

Question. Assertion : Safety fuses are made up of materials having a low melting point.
Reason : Safety fuses should be resistant to electric current.
Answer : C

Question. Assertion : AC load line is used for long distance transmission.
Reason : It has very less loss of energy in long distance transmission.
Answer : A

Question. Assertion : Copper is used to make electric wires.
Reason : Copper has very low electrical resistance.
Answer : A

Question. Assertion : When two bulbs are operated on same voltage supply, having power 60W and 100W then 100W bulb has less resistance than 60W.
Reason : The power of the bulb is directly proportional to the square of the voltage.
Answer : B

Question. Assertion : The magnetic field produced by a current carrying solenoid is independent of its length and cross-section area.
Reason : The magnetic field inside the solenoid is uniform.
Answer : B

 

Question : SI unit of magnetic field strength is 

(a) Oersted
(c) Volt 
(b) Ampere
(d) Ohm
 
Question :  Inside the magnet the field lines run 
(a) From south to north
(c) From north to south 
(b) Away from north pole
(d) Away from the south pole
 
Question :  The magnetic field strength of a solenoid can be increased by inserting 
(a) A wooden piece into it
(c) A glass piece into it 
(b) An iron piece into it
(d) Paper roll into it
 
Question :  Strength of the magnetic field at a point in the space surrounding the magnet is measured by 
(a) Thickness of the magnet
(c) The number of lines crossing a given point 
(b) The resistance of it
(d) Length of the magnet
 
Question :  The magnetic field inside the solenoid is 
(a) Non uniform
(c) same at all points 
(b) Variable
(d) zero
 
Question :  An electron enters a magnetic field at right angles to it. The direction of force acting on the electron will be 
(a) To the right
(c) To the left 
(b) Out of the page
(d) Into the page
 
Question :  At the time of short circuit , the current in the circuit 
(a) Reduces instantaneously
(c) Does not change 
(b) Increases heavily
(d) Vary continuously
 
Question :  Device used to test whether the current is flowing in a conductor or not is 
(a) Ammeter
(c) Galvanometer 
(b) Voltmeter
(d) Battery
 
Question :  The process of Inducing current in a coil of wire by placing it in a region of changing magnetic field is 
(a) Electrical effect
(c) Magnetic effect of current 
(b) Heating effect of current
(d) Electromagnetic induction
 
Question :  The frequency of power supply used in India is 
(a) 70Hz
(c) 60 Hz 
(b) 50Hz
(d) 30Hz 
 
Question : Which of the following property of proton will change while it moves freely in a magnetic field 
(a) Mass
(c) velocity 
(b) speed
(d) momentum
 
Question :  Which one is correct among the following? 
(a) Red insulated wire is called live wire
(b) Black insulated wire is called neutral wire
(c) Green insulated wire is called earthing
(d) All of the above
 
Question :  The magnetic field lines inside a solenoid is in the form of : 
(a) Curved line 
(c) Zig -zag lines 
(b) circular lines
(d) parallel straight lines 
 
Question :  The core of electromagnet is: 
(a) Soft iron
(c) magnesium 
(b) steel
(d) copper 
 
Question :  When a bar magnet is broken into two pieces :
(a) we will have single pole on each piece 
(b) each piece will have two like poles
(c) each piece will have two unlike poles 
(d) each piece will lose magnetism
 
Question :  Which one of the following is a non magnetic substance :
(a) Iron 
(b) Nickel 
(c) Cobalt 
(d) Silver
 
Question :  The mineral which can attract the pieces of iron towards it is :
(a) Fe2O
(b) Fe3O4 
(c) FeO 
(d) None of these
 
Question :  Needle of a magnetic compass always points in :
(a) East direction 
(b) North west direction
(c) North–South direction 
(d) Neither A nor B
 
Question :  Which of the following can lead to demagnetisation of a magnet :
(a) Hammering 
(b) Strong heating 
(c) Aging 
(d) All are correct
 
Question :  Attracting power of a horse shoe magnet can be increased by :
(a) Increasing its length 
(b) Decreasing the gap between its poles
(c) Keeping it at a cold place
(d) None of these
 
Question :  Identify the odd one :
(a) Gold 
(b) Nickel 
(c) Iron 
(d) Cobalt
 
Question :  The south pole of a freely suspended magnet points to the :
(a) Geographical south 
(b) Geographical north
(c) Slightly left of geographical north 
(d) None of these
 
Question :  A magnetic compass is placed at a point near a bar magnet. Direction of magnetic field at that point will be:
(a) Tangential to compass needle 
(b) Normal to compass needle
(c) Towards the south pole of compass needle 
(d) None of these
 
Question :  Magnetic field is :
(a) Scalar 
(b) Vector
(c) Some times scalar sometimes vector 
(d) Nothing can be said
 
Question :  Metal which can be used for construction of base of magnetic compass is :
(a) Iron 
(b) Nickel 
(c) Aluminium 
(d) Cobalt
 
Question :  Magnetic field lines of earth travels from ...............to...............inside the earth :
(a) South pole, north pole 
(b) North pole, south pole
(c) North pole, infinity 
(d) Infinity, south pole
 
Question :  If a magnet is suspended freely at north pole then :
(a) It will become horizontal 
(b) It will start rotating
(c) It will become vertical 
(d) It will oscillate
 
Question :  If current flows from north to south in a conductor placed over magnetic compass then north pole of magnetic compass with point towards :
(a) South 
(b) North 
(c) East 
(d) West
 
Question :  Important property of soft iron which make it suitable for making the core of an electromagnet is :
(a) Strength
(b) It behaves as a magnet in presence of external magnetic field only
(c) Its melting point is high
(d) None of these
 
Question :  The magnetic field inside a solenoid is :
(a) Zero 
(b) Decreases along the axis
(c) Increases along the axis 
(d) Uniform
 
Question :  The polarity of an electromagnet depends on the :
(a) Number of the turns in a coil 
(b) Direction of flow of current
(c) Nature of material
(d) All are correct
 
Question :  By increasing the number of turns in the coil, the strength of the magnetic field:
(a) decreases 
(b) increases
(c) first increases then decreases 
(d) remains unchanged
 
Question :  The emf produced in a wire by its motion across a magnetic field does not depend upon :
(a) The length of the wire 
(b) The composition of the wire
(c) The speed of the wire 
(d) The orientation of the wire
 
Question :  Direction of force acting on a current carrying conductor kept in a magnetic field is given by :
(a) Fleming’s right hand rule 
(b) Fleming’s left hand rule
(c) Lenz’s rule 
(d) Faraday’s rule
 
Question :  The most common device for providing an emf is :
(a) Electric cell 
(b) Generator
(c) Fuel cell 
(d) All of these
 
Question :  Unit of (a) (c) is :
(a) ev 
(b) Ampere 
(c) Farad 
(d) Fleming
 
Question :  The various distribution circuits are connected in :
(a) Series 
(b) Parallel
(c) Series or parallel 
(d) Nothing can be said
 
Question :  We will receive an electric shock if we touch :
(a) Live wire 
(b) Neutral wire
(c) Earth wire 
(d) Any of the above
 
Question :  The touching of the live wire and neutral wire directly is known as :
(a) Power rating 
(b) Short circuit 
(c) Over loading 
(d) None of these
 
Question :  Electricians use rubber gloves while working because :
(a) Rubber is an insulator 
(b) Rubber is a good conductor
(c) It is easy to work while wearing gloves 
(d) None of these
 
Question :  Why copper wire cannot be used as a fuse wire :
(a) Copper wire will get warm
(b) Copper wire has melting point quite high and it will not melt easily
(c) Copper wire melts easily due to overloading
(d) None of these
 
Question :  Which of the following effects of current does not depend on direction of current :
(a) Lighting and chemical effect 
(b) Heating and lighting effect
(c) Heating and magnetic effect 
(d) Magnetic and chemical effect
 
Question :  Electric power is transmitted over long distance through conducting wires at very high voltage because :
(a) The power losses are reduced to minimum
(b) Signal of high voltage travel faster
(c) High voltage can be stepped down to desired levels easily
(d) None of these
 
Question :  Birds do not feel electric shock while sitting on a current carrying uninsulated wires because :
(a) The current does not pass through the body as the claws of birds are non-conducting
(b) The resistance offered by the body of birds is very high
(c) The feathers of birds act as an insulator and hence current does not pass through them
(d) The potential difference between the two claws of birds is very small
Chapter 01 Chemical Reactions and Equations
CBSE Class 10 Science Chemical Reactions and Equations MCQs
Chapter 02 Acids, Bases and Salts
CBSE Class 10 Science Acids Bases and Salts MCQs
Chapter 03 Metals and Nonmetals
CBSE Class 10 Science Metals and Non Metals MCQs
Chapter 04 Carbon and its Compounds
CBSE Class 10 Science Carbon and its Compounds MCQs
Chapter 05 Periodic Classification of Elements
CBSE Class 10 Chemistry Periodic Classification of Elements MCQs
Chapter 07 Control and Coordination
CBSE Class 10 Biology Control and Coordination MCQs
Chapter 08 How do Organisms Reproduce
CBSE Class 10 Biology How do Organisms Reproduce MCQs
Chapter 09 Heredity and Evolution
CBSE Class 10 Science Heredity and Evolution MCQs
Chapter 10 Light Reflection and Refraction
CBSE Class 10 Physics Light Reflection and Refraction MCQs
Chapter 11 The Human Eye and the Colourful World
CBSE Class 10 Science The Human Eye and the Colourful World MCQs
Chapter 13 Magnetic Effects of Electric Current
CBSE Class 10 Science Magnetic Effects of Electric Current MCQs
Chapter 16 Sustainable Management of Natural Resources
CBSE Class 10 Biology Management of Natural Resources MCQs

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