Current Electricity
Practice Test
1.
If the resistance of the lightbulb in Figure 22-3 were changed to 6 Ω, what would tha ammeter read?
a.
6 A
b.
4 A
c.
8 A
d.
2 A
Hint
2.
A 12.0 V battery delivers a 1.20 A current to an electric motor that is connected across terminals. What power is consumed by the motor?
a.
10.0 J
b.
14.4 J
c.
10.0 W
d.
14.4 W
Hint
3.
A kilowatt-hour is equivalent to:
a.
1.0×10
3
J/s
b.
3.6×10
6
J/s
c.
1.0×10
3
J
d.
3.6×10
6
J
Hint
4.
For the circuit arrangement shown in Figure 22-4, if the battery voltage is 9.0 V and the ammeter reads 0.60 A, what is the resistance?
a.
15 Ω
b.
30 Ω
c.
5.4 Ω
d.
0.06 Ω
Hint
