Practice Problems
Resistors and Capacitors
Directions:
On this worksheet you will review the formulas and relationships for capacitors wired in series and in parallel and well as capacitors in DC circuits.
omit
Question 1
In the circuit shown below, the values for each capacitor are:
C
1
= 7 µF C
2
= 5 µF C
3
= 8 µF;
Based on these values, what would be the total capacitance of this combination?
This diagram is only referenced in Questions 1-4.
2.1 µF
20.0 µF
4.55 µF
10.08 µF
omit
Question 2
What is the charge on each plate of capacitor C
1
if the emf of the battery is 12 volts?
18.2 µC
2.64 µC
84.0 µC
54.6 µC
omit
Question 3
What is the voltage drop across capacitor C
3
?
4.2 volts
4.0 volts
7.8 volts
3.9 volts
omit
Question 4
What is the charge on capacitor C
2
?
21.0 µC
18.2 µC
33.6 µC
2.40 µC
omit
Question 5
What would be the capacitance of a parallel plate capacitor where each plate has an area of 36 cm
2
and the plates are separated by 3 mm?
1.06 x 10
-11
F
7.38 x 10
-12
F
9.56 x 10
-10
F
5.31 x 10
-11
F
omit
Question 6
If the capacitor in Question #5 were to be charged by a 12-V battery, how much energy would be stored in the electric field between the capacitor's plates?
5.31 x 10
-10
Joules
1.27 x 10
-10
Joules
7.65 x 10
-10
Joules
3.82 x 10
-9
Joules
omit
Question 7
In the circuit shown below, R
1
has a resistance of 500 ohms, R
2
has a resistance of 800 ohms, and the battery has an emf of 12 volts. What would be the voltage lost across R
1
when steady state currents have been achieved?
12.0 volts
4.62 volts
7.50 volts
6.00 volts
omit
Question 8
If the capacitor has a capacitance equal to 7 µF, how muc charge would be stored on its plates when steady-state conditions have been reached?
84.0 µC
the charge cannot be determined
32.3 µC
51.7 µC
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