SP212/3321&5521
Chapter 27 - Worksheet #3
Question 1: The capacitor in the circuit below is initially uncharged when the switch is closed at
time t=0. (a) How much charge is stored on the capacitor at time t=0.75 s? (b) How much current
is running through the circuit at time t=0.75 s?
250.0 Ω
4.00 mF
18.0 V
Question 2: In the circuit below, the switch is moved to position A to fully charge the capacitor. At
time t=0, the switch is flipped to position B. (a) How much charge is stored on the capacitor at
time t=0.75 s? (b) How much current is running through the circuit at time t=0.75 s?
A
B
25.0 V
5.00 mF
320.0 Ω
SP212/3321&5521
Chapter 27 - Worksheet #3
Question 3: A capacitor with C=2.00 × 10−3 F is connected in a series RC circuit with a resistor
and an ideal battery. The capacitor is uncharged when the switch is closed at time t=0. The charge
on the capacitor as a function of time after the switch is closed is shown in the figure below.
R
0.4
q(t) [C]
0.3
2.00 mF
0.2
E
0.1
0
0
2
4
6
8 10
time [s]
12
14
(a) What is the value of E, the emf of the battery?
(b) What is the value of R, the resistance in the circuit?