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Assertion : A solid sphere and a hollow ...

Assertion : A solid sphere and a hollow sphere of same material and same radius are kept at same temperature in atmosphere. Rate of cooling of hollow sphere will be more.
Reason : If all other conditions are same, then rate of cooling is inversely proportional to the mass of body.

A

If both Assertion and Reason are true and the Reason is correct explanation of the Assertion.

B

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

C

If Assertion is true, but the Reason is false.

D

If Assertion is false but the Reason is true.

Text Solution

Verified by Experts

The correct Answer is:
A
`-(dT)/(dt) = (eAsigma)/(mc) (T^4 - T_(0)^4) or -(dT)/(dt) prop 1/m`
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