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Home  >>  JEEMAIN and AIPMT  >>  Physics  >>  Class12  >>  Current Electricity
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A rigid container with thermally insulated walls contains a coil of $100 \Omega$ resistance with a current of $1A$. Change in internal energy after 5 min will be

$\begin {array} {1 1} (A)\;Zero & \quad (B)\;10KJ \\ (C)\;20KJ & \quad (D)\;30KJ \end {array}$


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 The change in the internal energy$ \Delta U = i^2Rt$
on substituting the values we get $ \Delta U= 30kJ$
Ans : (D)


answered Feb 8, 2014 by thanvigandhi_1
edited Sep 10, 2014 by thagee.vedartham

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