Refor to the following ßigure for problems 15 and 16 The circuit in the disgram

Question

Refor to the following ßigure for problems 15 and 16 The circuit in the disgram consisto of a resistor (R = 20 M), a capacitor (C = 0.1 F), and a switch. The capacitor has an initial charge of Qo = 6x10-1 C. Probiem 15 (6.25 pts): Immediately after the switch is closed, what is the current in the resistor? A) 12 A B) 20 x 10-7A C) × 10-7 A D)3×10-7 A E) Zero amps. Problem 16 (6.25 pts): What will be the charge on the capacitor plate after 1s? A) 2.2 × 10-7 C B) 3.6 × 10-7 C C) 4.4 × 10-7 C D) 6.0 x 10-7 C E) zero C

Explanation / Answer

Given,

C = 1 uF ; R = 20 MOhm ; Q0 = 6 x 10^-7 C

15)(D)3 x 10^-7 A

explanation:

I = V/R

Q = CV => V = Q/C = 6 x 10^-7/0.1 x 10^-6 = 6 V

I = 6/20 x 10^6 = 3 x 10^-7 A

Hence, (D)3 x 10^-7 A

16)(D)6 x 10^-7 C

Charge is conserved.

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