Figure 3: RC circuit where, VB = 5.00V , and C = 3.5mF Consider the circuit...

Question

Question

C R B

Figure 3: RC circuit where, VB = 5.00V , and C = 3.5mF Consider the circuit in Figure 3, where,VB = 5.00V , and C = 3.5mF .

a) What should be the resistance of the resistor, such that the capacitor charges in to 75% its max charge in a time t = 72.8s?

b) The instant the switch is closed, where is the vast majority of the potential dropped? Explain.

c) How much work is needed to charge the capacitor for a time t = 35.0s? Hint, remember P = dW ,

dt so,W= Pdt.

science physics

Answer 1

Answer #1

a) V = Vo*[1 - e^(-t/RC)]

0.75 = [1 - e^(-72.8/(R*0.0035))]

(-72.8/(R*0.0035)) = ln0.25

R = 15004 ohm

b) Capacitor

Answer 2

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