a) An uncharged capacitor and a resistor are connected in series to a battery as

Question

a) An uncharged capacitor and a resistor are connected in series to a battery as shown. If ? = 15

V, C = 20

an uncharged capacitor and a resistor are connected in series to a battery as shown. If ? = 15 V, C = 20 mu F, and R = 4.0 times 105 ?, what is the time constant of the circuit? An uncharged capacitor and a resistor are connected in series to a battery as shown. If ? = 15 V, C = 20 µF, and R = 4.0 times 105 ?, what is the maximum current in the circuit? An uncharged capacitor and a resistor are connected in series to a battery as shown. If ? = 15 V, C = 20 mu F, and R = 4.0 times 105 ?, what is the maximum charge on the capacitor?

Explanation / Answer

a) T = RC = 8 s

b) current will be at t=0, since at that time capacitor doesn't any charge and hence no potential difference.

I(max) =v /r = 15/4x105 = 37.5 uA

c) charge will be m ax. on capacitor when whole potential difference is across capacitor

q(max) = Cv = 0.3 C

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