1. Tardigrade
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  4. A rigid container with thermally insulated walls contains a coil of resistance 100 Ω , carrying current 1 A. Change in internal energy after 5 min will be:

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Q. A rigid container with thermally insulated walls contains a coil of resistance $ 100\,\Omega , $ carrying current $1\,A$. Change in internal energy after $5\, \min$ will be:

BHUBHU 2006

Solution:

$W=0$ Therefore, from first law of thermodynamics
$\Delta U=\Delta Q=i^{2} R t$
$=(1)^{2} \times 100(5 \times 60) $
$=30\, k J$