Exercise 26.40 Part A You connect a battery, resistor, and capacitor as in (Figu

Question

Exercise 26.40 Part A You connect a battery, resistor, and capacitor as in (Figure 1), where E-36.0 V , C = 5.00 F , and R-130 . The switch S is closed at t 0 When the voltage across the capacitor is 8.00 V, what is the magnitude of the cur circuit? Express your answer with the appropriate units 1= 0.215 A Submit My Answers Give Up Correct Part B Figure 1 4 of 1 At what time t after the switch is closed is the voltage across the capacitor 8.00 V Express your answer with the appropriate units Switch open Value Units Submit My Answers Give Up 0 Incorrect; Try Again; 12 attempts remaining

Explanation / Answer

(B)

PD across the capacitor,

V = V0 [ 1 - e^(-t/T)]

where T = time constant = R C

T = 0.65 x 10^-3 s

putting values,

8 = 36 [1 - e^(-t/0.65 ms)]

t = 0.163 ms or 1.63 x 10^-4 sec

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