D. 120 V E. none of these Problems (15 points each) 5. An uncharged capacitor ha

Question

D. 120 V E. none of these Problems (15 points each) 5. An uncharged capacitor has parallel square plates 5 on a side and spaced by 1.2 mm apart (a) How much work is required to transfer 7.0 HC of charge? (b) how much work is required to transfer a second 7.0 HC of charge? Determine the following quantities for the circuit shown on the right (a) the equivalent resistance, (b) the total current from the power supply. (o) the current through each resistor, (d) the voltage drop across each resistor 6. across each resistor125YI 20 30 50 e

Explanation / Answer

6. (a) three resistors are connected in series,

for series,
Req = R1 + R2 + R3

Req = 20 + 30 + 50 = 100 ohm .....Ans

(B) I = V / Req = 125 / 100 = 1.25 A  

(C) current through each of them = 1.25 A  

(D) V = I R

across 20 ohm = 20 x 1.25 = 25 Volt

across 30 ohm = 30 x 1.25 = 37.5 Volt

across 50 ohm = 62.5 Volt

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