Section 22.1
Current and Circuits
Practice Test
1.
If the the current in the circuit of Figure 22-5 is 1.5 A, what is the total resistance of the circuit?
a.
18 Ω
b.
4 Ω
c.
8 Ω
d.
16 Ω
Hint
2.
If the ammeter in Figure 22-3 were moved to the left of the light bulb, what would it read?
a.
0 A
b.
1 A
c.
4 A
d.
2 A
Hint
3.
In Figure 22-3, if the battery voltage were changed to 9 V, what would the ammeter reading be?
a.
2 A
b.
1 A
c.
3 A
d.
4 A
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.
5.4 Ω
b.
0.06 Ω
c.
15 Ω
d.
30 Ω
Hint
5.
If the resistance of the lightbulb in Figure 22-3 were changed to 6 Ω, what would tha ammeter read?
a.
2 A
b.
6 A
c.
4 A
d.
8 A
Hint
6.
If the combined resistance of the potentiometer and motor in Figure 22-5 is 250 Ω, what is the current through the circuit?
a.
21 A
b.
48 mA
c.
3000 A
d.
120 A
Hint
