Consider the RC-circuit shown to the right. Initially switch S has been open for

Question

Consider the RC-circuit shown to the right. Initially switch S has been open for a long time. (a) What is the charge on the capacitor when the switch SW has been open for a long time? (b) Next the switch S is closed for a long time. What is the charge on the capacitor after the switch SW has been closed for a long time? Consider the RC-circuit shown to the right. Here, =120 V, R1 = 4,200 Ohm, R2 = 4,000 Ohm, R3 = 1,000Ohm and C = 4,700 mu F . Initially the switch SW is open for a long time and the capacitor C is uncharged. The switch then is closed at t=0 (a) Find the value of i1 and i2 immediately after closing the

Explanation / Answer

after long time voltage across capacitor Vc = 2V Q = CV = 2*20uF = 40 coulomb

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