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Total Questions: 5
1. In order that the heat flows from one part of a solid to another part, what is required?
Correct Answer is : Temperature gradient
2. A body A of mass 0.5kg and specific heat 0.85 is at a temperature of 60°C. Another body B of mass 0.3kg and specific heat 0.9 is at a temperature of 90°C. When they are connected to a conducting rod, heat will flow from
Correct Answer is : B to A
3. Two rods having thermal conductivity in the ratio of 5:3 having equal lengths and equal cross-sectional area are joined end to end. If the temperature of the free end of the first rod is 100°C and free end of the second rod is 20°C, then the temperature of the junction is
Correct Answer is : 70°C
4. Mud houses are cooler in summer and warmer in winter because
Correct Answer is : Mud is a bad conductor of heat
5. A perfectly black body is one whose
Correct Answer is : Absorptive power is 1
