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  • In the circuit shown in the figure, the switch S is in position ‘1’ for a long time. Now the switch is thrown to position ‘2’. Find the total heat developed in the circ

In the circuit shown in the figure, the switch S is in position ‘1’ for a long time. Now the switch is thrown to position ‘2’. Find the total heat developed in the circuit till the steady state is reached again

Option: 1

0.04 J


Option: 2

0.4 J


Option: 3

0.02 J


Option: 4

0.4 J


Answers (1)

best_answer

\begin{aligned} &\mathrm{\text{Initial charge on capacitor:} Q_1=2 \times 100=200 \mu \mathrm{C}}\\ &\mathrm{\text{Final charge: }Q_2=2 \times 300=600 \mu \mathrm{C}}\\ &\mathrm{ W_b=300\left[Q_2-Q_1\right]=120000 \mu \mathrm{J} }\\ &\mathrm{ \Delta U=\frac{1}{2} C\left[300^2-100^2\right]=80000 \mu \mathrm{J} }\\ &\mathrm{ \text { Heat }=W_b-\Delta U=40000 \mu \mathrm{J}=0.04 \mathrm{~J}} \end{aligned}

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Ritika Harsh

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