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  4. When the switch is closed, then the initial current through 1 Ω resistor is (see figure)

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Q. When the switch is closed, then the initial current through $1\, \Omega$ resistor is (see figure)Physics Question Image

Current Electricity

Solution:

At $t=0$, the capacitor behaves as a short circuit. The corresponding circuit is shown in figure. According to the loop rule,
image
$12-3 I=0$ or $I=4\, A$