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Questions  >>  JEEMAIN and NEET  >>  NEET PAST PAPERS  >>  2018
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Q)

A small sphere of radius 'r' falls from rest in a viscous liquid. As a result, heat is produced due to viscous force. The rate of production of heat when the sphere attains its terminal velocity, is proportional to


( A ) $r^2$
( B ) $r^4$
( C ) $r^3$
( D ) $r^5$

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