Q.

There are two spherical balls A and B of the same material with same surface, but the diameter of A is half that of B. If A and B are heated to the same temperature and then allowed to cool, then

Moderate

Unlock the Full Solution and Master the Concept

Get a detailed solution and exclusive access to our masterclass to ensure you never miss a concept
By Expert Faculty of Sri Chaitanya

a

rate of cooling is same in both

b

rate of cooling of A is four times that of B

c

rate of cooling of A is twice that of B

d

rate of cooling of A is 14 times that of B

answer is 3.

(Detailed Solution Below)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

Rate of cooling, RC=AεσT4−T04mc=AεσT4−T04VρC⇒ RC∝AV∝1r∝1( Diameter ) (∵ m=ρV)Since diameter of A is half that of B, its rate of cooling will be twice that of B.
ctaimg
Choose your Grade and Exam
edit icon

Connect with our

Expert Counsellors

access to India's best teachers with a record of producing top rankers year on year.

+91

We will send a verification code via OTP.

whats app icon