10 -5 points SerPOPS 21 POSW Vly Niotes Ask consider a seres RCorcuit as in te f

Question

10 -5 points SerPOPS 21 POSW Vly Niotes Ask consider a seres RCorcuit as in te fgure below for which R . 2.00 Ma, C.9.00 , and E·25.0 V. (a) Find the time constant of the circut b) what is the maximum charge on the cepacitor after the switch is thrown closed (c) Find the current in the res stor 10.0 s after the switch is closed Need Help? ash Vy Notes O Ask A 7.0 uF capacitor is charged by a 12.0 V battery threugh a resistance R. The capacitor reaches a potencial difference of 4.00 V at a time 3.00 s after charging begins. Find R kn Need Help?

Explanation / Answer

Solution ) (a)Time constant t=RC

t=(2×10^(6))×(9×10^(-6))

t=18 seconds

(b) Maximum charge Q=CE

Q=9×10^(-6)×(25)

Q=225×10^(-6)C

Q=225uC

(c) current in the resistor I=E-V/R

q=Q(1 - e^(-t/RC))

q=225×10^(-6)(1-e^(-10/18))

q=96.75×10^(-6)

V=q/C

V=96.75×10^(-6)/9×10^(-6)

V=10.75V

Current I=E-V/R

I=25-10.75/(2×10^(6))

I=7.125×10^(-6)A

I=7.125uA

Second question is same all most you please try in above method

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