Problem 30.68 In the circuit shown in the figure (Figure 1) , S 1 has been close

Question

Problem 30.68

In the circuit shown in the figure (Figure 1) , S1 has been closed for a long enough time so that the current reads a steady 3.50A . Suddenly, S2 is closed and S1 is opened at the same instant.

Part A

What is the maximum charge that the capacitor will receive?

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Part B

What is the current in the inductor at this time?

  A

Problem 30.68

In the circuit shown in the figure (Figure 1) , S1 has been closed for a long enough time so that the current reads a steady 3.50A . Suddenly, S2 is closed and S1 is opened at the same instant.

Part A

What is the maximum charge that the capacitor will receive?

Qmax= mC

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Incorrect; Try Again; 5 attempts remaining

Part B

What is the current in the inductor at this time?

i=

  A

Explanation / Answer

A)

For maximum charge on the capacitor ,

0.5Q^2/C = 0.5 * L*I^2

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

Q = 3.5 *10^-4 C

the maximum charge on the capacitor is 3.5 *10^-4 C

B)

Now , when the charge is maximum , Current is Zero

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