# Electricity sections 4-6 Part B

## Quiz by Gwyn Bixler

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15 questions
Show answers
• Q1
If a household’s voltage is 120 volts, what is the power rating of a light bulb with 0.2 amps of current flowing through it?
600 watts
2.4 kw
.0016666 watts
24 watts
30s
• Q2
Power is calculated by multiplying voltage by
resistance.
current.
energy.
voltage.
30s
• Q3
A device used to open and close an electric circuit is a(n)
resistor.
light bulb.
energy source.
switch.
30s
• Q4
What effect would a current of greater than 0.2 amp have on your body?
It would be almost unnoticeable.
It would feel like a shock you get from touching a doorknob.
It could cause burns and stop your heart.
It might cause an irregular heartbeat and disrupt the flow of blood.
30s
• Q5
What is a disadvantage of using fuses?
When a fuse burns out, it cannot be used again.
A fuse shuts off when the current gets too high.
A fuse contains a thin strip of metal that can melt.
A fuse prevents circuits from overheating.
30s
• Q6
A connection that allows current to take the path of least resistance is called a
parallel circuit.
grounded circuit.
series circuit.
short circuit.
30s
• Q7
A device to measure electrical potential energy difference, or voltage, is called a(n)
galvanometer.
voltmeter.
Ohm meter.
ammeter.
30s
• Q8
In a parallel circuit with three bulbs,
there is only one path for the current to take.
the overall resistance increases if a new branch is added.
current from each bulb has its own path.
the bulbs must all be located on the same branch.
30s
• Q9
In a series circuit with three bulbs, adding another bulb will
make all the bulbs dimmer.
make some of the bulbs dimmer.
make all the bulbs brighter.
make the nearest bulb brighter.
30s
• Q10
According to Ohm’s law, what is the resistance of a light if the voltage is 6.0 volts and the current is 0.30 amps?
20 ohms
0.05 ohms
answer not given
1.8 ohms
30s
• Q11
According to Ohm’s law, resistance is equal to voltage divided by
time.
current.
potential.
conduction.
30s
• Q12
If an electric water heater uses 60 kW of power and runs for 2 hours, what is the total amount of energy used?
0.03 kwh
answer not given
30 kwh
120 kwh
30s
• Q13
The current through an appliance in an electric circuit is 9 A. The voltage across the device is 45 V. What is the resistance of the appliance?
405 ohms
0.2 ohms
answer not given
5 ohms
30s
• Q14
A toaster oven has a resistance of 3 ohms in its heating coils. The voltage across the coils in the standard 120 V. What is the current in the heating coils?
40 A
360 A
3.6 A
0.025 A
30s
• Q15
There is a 3.0 A current in a light-bulb in an electric circuit. The resistance of the bulb is 20 ohms. What is the voltage across the bulb?
6.66 V
0.15 V
60 V
not given
30s

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