Section 23.2
Applications of Circuits
Practice Test
1.
Why does running too many appliances on one circuit cause a fuse to blow or a circuit breaker to shut off?
a.
The current drops to almost zero.
b.
As more resistors are added in parallel, the total resistance decreases, which causes an increase in the total amount of voltage.
c.
As more resistors are added in parallel, the total resistance decreases, which causes an increase in the total amount of current.
d.
The voltage becomes too much for the circuit to handle.
Hint
2.
Why must an ammeter have an extremely low resistance?
a.
High resistance will change the current in the circuit you want to measure.
b.
High resistance reduces risk of fire.
c.
High resistance changes the voltage reading.
d.
High resistance ensures there are fewer ohms.
Hint
3.
What causes a fuse to blow?
a.
too much resistance
b.
too high a current
c.
too low a resistance
d.
too high a voltage
Hint
4.
Electrical wiring in homes uses __________ circuits.
a.
parallel
b.
series
c.
overloaded
d.
voltage
Hint
5.
Voltmeters must have __________.
a.
very high currents
b.
very high resistance
c.
very high voltage
d.
very low resistance
Hint
6.
Current is measured by a(n) __________.
a.
ohmmeter
b.
ammeter
c.
electrometer
d.
voltmeter
Hint
7.
What happens when an electric switch is turned off?
a.
There is a short circuit.
b.
The circuit is broken.
c.
The circuit becomes a series circuit.
d.
A circuit breaker turns off.
Hint
8.
How is a circuit breaker different from a fuse?
a.
A circuit breaker does not detect current.
b.
A circuit breaker can be used mutliple times.
c.
A circuit breaker is less sophisticated.
d.
A circuit breaker causes fires.
Hint
9.
How does a ground-fault interrupter work?
a.
It detects small differences in voltage caused by an extra voltage path and opens the circuit.
b.
It detects small differences in temperatures and opens the circuit.
c.
It detects small differences in current caused by an extra current path and opens the circuit.
d.
It detects small differences in resistance and opens the circuit.
Hint
10.
A voltmeter should be connected to a circuit in __________.
a.
parallel
b.
short form
c.
series-parallel
d.
series
Hint
