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Questions  >>  JEEMAIN and NEET  >>  NEET PAST PAPERS  >>  2005

Which of the following circular rods, (given radius r and length l) each made of the same energy material and whose ends are maintained at the same temperature will conduct most heat

( A ) $r=r_0;l=l_0$
( B ) $r=2r_0;l=2l_0$
( C ) $r=r_0;l=2l_0$
( D ) $r=2r_0;l=l_0$

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