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Physics I Honors
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Electricity Review Sheet
1. Two 15  resistors are connected in series to a 120 volt source. The current flowing in the resistors is
a) 6 A
b) 4 A
c) 8 A
d) 0.25 A
e) 3 A
2. The potential energy per unit of charge is expressed in the
a) voltage
b) capacitance c) resistance
d) field
e) current
3. Consider the following circuit.


2A
V=?
30 
What is the potential difference across the voltage source?
a) 20 V
b) 25 V
c) 50 V
d) 80 V
e) 100 V
4. Two resistors of the same length, both made of the same material, are connected in a series to a battery
as shown below.
I
II
Resistor II has a greater cross-sectional area than resistor I. Which of the following quantities has the same
value for each resistor?
a) potential difference between the two ends
b) electric field strength
c) resistance
d) power
e) current
Questions 5-7 refer to
three 1 microfarad capacitors and the following possible results.
I. 0.33 microfarad
II. 1.0 microfarad
III. 0.55 microfarad
IV. 3.0 microfarad
V. 6.0 microfarad
5. If the three capacitors are connected in parallel, their total capacitance will be
a) I
b) II
c) III
d) IV
e) V
6. If the three capacitors are connected in series, their total capacitance will be
a) I
b) II
c) III
d) IV
e) V
7. If the dielectric (K=1.0) in each capacitor is replaced with a dielectric (K=3.0), the capacitance of each
capacitor will be
a) I
b) II
c) III
d) IV
e) V
8. The product
a) 8 coulombs
2 amps x 2 volts x 2 seconds
b) 8 newtons
c) 8 joules
is equal to
d) 8 calories
e) 8 newton-amperes
9. As the diameter of a copper wire is decreased, its resistance
a) remains constant
b) increases
c) decreases
d) varies with time
e) increases only with voltage
Questions 10-12 refer to the following diagram.




A1
A2





A3
B
10. If the ammeter A3 reads 6 amps, ammeter A1 will read how many amps?
a) 2 amps
b) 3 amps
c) 4 amps
d) 5 amps
e) 6 amps
11. How much voltage will be dropped across the 10 ohm resistor?
a) 30 volts
b) 20 volts
c) 9 volts
d) 15 volts
e) 1.2 volts
12. What is the voltage of Battery B?
a) 40 volts
b) 20 volts
c) 90 volts
e) 15 volts
d) 6.2 volts
13. According to the law of resistance, doubling the thickness of a given wire and making it ten times
longer will cause its resistance to be
a) 40 times greater
b) 20 times greater
c) 5 times greater
d) 2.5 times greater
e) 0.05 as much as before
Questions 14 and 15 refer to the following.
I. watts
IV. coulomb/volt
II. coulombs/second
V. volt/amp
III. joule/coulomb
14. Which statement is true about power?
a) I is a unit of power.
c) II x II x V produces a correct unit of power
15. How could you express Ohm’s Law?
a) III = II x V
b) I = II x III
d) V = IV x I
b) II x III produces a correct unit of power
d) Both a and b
e) a, b, and c
c) V = II x III
e) III = II x I
Questions 16 and 17 refer to the following five diagrams. Each of the 4 resistors is 10 ohms.
I.
II.
III.
IV.
V.
16. Which of the five combinations shown produces the least total resistance?
a) I
b) II
c) III
d) IV
e) V
17. Which of the five combinations shown produces the greatest total resistance?
a) I
b) II
c) III
d) IV
e) V
18. Which of the following capacitors, each of which has plates of area A, would store the most charge on
the top plate for a given potential difference V (K= vacuum=1 air=1 glass=4.6)?
V
V
a)
b)
d
d
vacuum
Glass
c)
d)
vacuum
d/2
air
e)
d/2
Glass
d/2
19. The five resistors shown below have the lengths and cross-sectional areas indicated and are made of the
same material with the same resistivity. Which resistor has the least resistance?
a)
L
A
b)
2L
A
c)
A
L
2A
d)
2L
A
e)
A
2A
A
L
2A
2A
s
d
2s
2d
C1
C2
s
2s
20. Two square parallel-plate capacitors of capacitance C1 and C2 have the dimensions shown in the
diagrams above. The ratio of C1 to C2 is
a) 1 to 4
b) 1 to 2
c) 1 to 1
d) 2 to 1
e) 4 to 1
Answers:
1. B
2. A
3. E
4. E
5. D
6. A
7. D
8. C
9. B
10.
11.
12.
13.
14.
15.
16.
17.
18.
C
B
B
D
E
A
D
B
E
19. E
20. B