Question

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In the RC circuit, the emf & - 12.0 V, resistance R -1.40 M.2, and capacitance C=1.80 uF. 5. What is the current in the circuit the instant the switch is closed? 6. What is the initial charge on the capacitor? 7. What is the time constant for the RC circuit? 8. How much charge is on the capacitor after on time constant?

Answer 1

Given, { = 12.00 R = 1.40 MR = 1.40x106R C = 1.80 MF = 1.80 x 106 F 5) The current in the instant the switch is closed is i i= lo è +/CR +0, i = To = 4 4 4 12 1.404 106 = 8.57x15L A © At any instant on the capacitor instant, charge ev (1-27 qa at +) q D initial charge Du the capacitor is The 7) The time circuit is constant if Re 1.80 x 1.40 て = 2.52 S

3. The on time constant 13 charge the capacitor after on the given * 2 - wt, - e-) = 1. 8ох бvх 12 ( - ) = 12. 6S X 106 с (м - 13 : 6S At
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