Question

Chapter 30 In the circuit shown in the figure, S, has been closed for a long enough time so that the current reads a steady 3.50 A. Suddenly, S is closed and S is opened at the same instant. S2 a) What is the maximum charge that the capacitor will receive? b) What is the current in the inductor at this time?
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Answer #1

Here ,

a) let the maximum charge is Q

as Q^2/(2 * C) = 0.50 * L * I^2

Q^2/(5 *10^-6) = 0.002 * 3.5^2

Q = 3.5 *10^-4 C

the maximum charge is 3.5 *10^-4 C

b) at this time , the current in the inductor is Zero

as the capacitor is fully charged

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