NEET Physics Thermal Properties of Matter Online Test Set B

The top of an insulated cylindrical container is covered by a disc having emissivity 0.6 and conductivity 0.167 WK^–1m_–1 and thickness 1 cm. The temperature is maintained by circulating oil as shown in figure. Find the radiation loss to the surrounding in Jm–2s^–1 if temperature of the upper surface of the disc is 27°C and temperature of the surrounding is 27°C.