List of top Physics Questions on Heat Transfer asked in AP EAPCET

Three identical conductors A, B, and C are in contact. Thermal conductivities are k, 2k, and k/2 respectively. A is at $100^\circ C$ and C is at $0^\circ C$. During steady state, the junction temperature between A and B is nearly:

If the absolute temperature of a black body is tripled, the total radiant energy emitted per second per unit area increases by a factor of: