WorksheetsElectricity
Total questions: 25
Worksheet time: 17mins
In a circuit diagram, this symbol represents a
Switch
Battery
Light bulb
Connecting wire
Which light bulb would never light up?
A
B
C
D
What is used to measure the electric current?
A voltmeter
An Ammeter
A speedometer
An ohmmeter
What type of circuit is this?
Parallel
Series
In a series circuit, how is the brightness of a light bulb affected when another bulb is connected?
It stays the same
It gets brighter
It gets dimmer
It goes out
Why are Christmas lights preferred to be wired in parallel?
It is cheaper to make
It uses less electricity
You can make longer strands
If a light breaks, the others keep working
If you increase the resistance in a circuit and keep the voltage the same, what will happen to the current?
It will increase
It will decrease
It will stay the same
The unit of electric current is
Amperes
Volts
Watts
Joules
If the voltage across a battery is 12.6 Volts, what would the current flow be for a 6 Ohm resistor?
12.6 A
6 A
2.1 A
75.6 A
What voltage is needed to cause a 2A current flow through a 10Ω resistor?
20 V
5 V
0.2 V
22 V
What is the power of a 20V bulb with 5A through it?
4 W
0.25 W
25 W
100 W
A teacher and his class are conducting an experiment. The class needs to choose a good insulator. Which of the following could be used as an insulator?
plastic plate
silver spoon
gold necklace
copper wire
If the light bulb in the middle burned out, what would happen to the other two?
The light bulb to the left would stay lit, but the one to the right would turn off.
The light bulb to the right would stay lit, but the one to the left would turn off.
They would both stay lit.
They would both turn off.
How many kilowatts are in 6500 W?
0.65 kW
6.5 kW
65 kW
6,500,000 kW
How many seconds are in 4 hours?
240 s
14,400 s
4 s
4000 s
What is the electrical energy in kWh of a 750 W waffle iron that is used for 15 min
0.1875 kWh
11,250 kWh
11.25 kWh
187.5 kWh
What is the electrical energy in Joules of a 70 W TV that is used for 4 hours?
1,008,000 J
0.28 J
16.8 J
16,800 J
How much is the monthly cost to run your 50 W radio for 3 hrs daily at $0.10 per kWh?
$0.45
$4.5
$450
$0.125
What is the equivalent resistance of the circuit?
66.6 ohm
0.005 ohm
187,500 ohm
200 ohm
What is the equivalent resistance of the circuit?
400 ohm
85.9 ohm
0.0025 ohm
34,375 ohm
If the current flowing in lamp A is 0.6 Amps, what is the current flowing in lamp B?
0.6 A
0 A
1.2 A
0.3 A
What is the voltage across R2?
9 V
18 V
4.5 V
0 V
What is one problem with using a series circuit?
It has a lot of series components.
It doesn't work properly.
If one light goes down, they all go down!
There are no problems.
What does voltmeter V2 reads?
1 V
1.5 V
0.5 V
2.5 V
What is the reading of ammeters A2 and A3 if the lamps are identical?
A2 = 3.0 A and A3 = 3.0 A
A2 = 1.5 A and A3 = 1.5 A
A2 = 1 A and A3 = 2 A
A2 = 6.0 A and A3 = 6.0 A
