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Assertion : A solid sphere of copper of ...

Assertion : A solid sphere of copper of radius `R` and a hollow sphere of the same material of inner radius `r` and outer radius `R` are heated to the same temperature and allowed to cool in the same environment. The hollow sphere cools faster.
Reason : Rate of cooling is according to Stefan's law which is `E alpha T^(4)`

A

If both Assertion and Reason are true and the Reason Is the correct explanation of the Assertion

B

If both Assertion and Reason are true but the Reason Is not the correct explanation of the Assertion

C

Assertion Is true but Reason Is false

D

Assertion Is false but Reason Is true

Text Solution

Verified by Experts

The correct Answer is:
B
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