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WorksheetsElectrical Power and Potential Difference
Total questions: 17
Worksheet time: 9mins
Which label points to the Fuse on the diagram?
C
D
E
F
Which label points to the Live Wire on the diagram ?
A
B
C
D
TV is 240V and 800W. What is the suitable fuse rating for the TV?
1 A
2 A
3 A
5 A
Heater is 240V and 2200W. What is the suitable fuse rating for the heater?
10 A
13 A
3 A
5 A
Electric current is measured in
kWh
Amps
Ohms
Watts
Electric power is measured in
kWh
Amps
Ohms
Watts
Electric energy is measured in
kWh
Amps
Ohms
Watts
Resistance is measured in
kWh
Amps
Ohms
Watts
The rate at which electric energy is used is called
Electric energy
Electric power
Voltage difference
Electric current
A bulb has a power of 12W and a voltage of 2V. Which fuse would be the most sensible to use?
6A
7A
3A
5A
A device that contains a thin strip of metal that melts easily if the current in the circuit is too high
Fuse
resistor
earth wire
battery
diode
Remember: I = P/V
A kilowatt (kW) is how many watts?
10
50
100
1000
Calculate the power generated as a 20 A current flows through a 10Ω resistor?
2 W
200 W
4000 W
400 W
