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Two substance of same size are made of s...

Two substance of same size are made of same material but one is hollow and the other is solid. They are heated to same temperature, then

A

Rate of heat radiation in solid is more

B

Rate of heat radiation in hollow is more

C

Rate of heat radiation in both are equal

D

Depends on mass of the sphere

Text Solution

Verified by Experts

The correct Answer is:
C
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Knowledge Check

  • Two spheres of same size are made of the same metal but one is hollow and the other is solid. They are heated to same temperature, then

    A
    both spheres will expand equally
    B
    hollow sphere will expand more than the solid one
    C
    solid sphere will expand more than the hollow one
    D
    none of the above

  • Two spheres of the same size are made of the same metal, but one is hollow and the other is solid. They are heated to the same temperature. Then,

    A
    the hollow sphere will expand more
    B
    the solid sphere will expand more
    C
    both spheres will expand almost equally
    D
    only the solid sphere will expand

  • Statement-1: There are two spheres made of same amount of material, one of them is hollow and other is solid. They are heated to same temperature and left in identical surroundigs. The initial rate of cooling will be greater for hollow sphere. ltBrgt Statement-2: The rate of heat loss depends on surface area and temperature.

    A
    Statement-1 is true, statement-2 is true, statement-2 is a correct explanation for statement-1
    B
    Statement-1 is true, statement-2 is true, statement-2 is not a correct explanation for statement-1
    C
    Statement-1 is true, statement-2 is false
    D
    Statement-1 is false, statement-2 is true