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WorksheetsElectrical Power
Total questions: 12
Worksheet time: 18mins
Name
Class
Date
1.
If the hair dryer and the vacuum cleaner are both on, what is the power used?
a)
2600 watts
b)
400 watts
c)
2200 watts
d)
1100 watts
2.
Electrical power can be calculated using
a)
Resistance x Voltage
b)
Voltage x Current
c)
Voltage ÷ Current
3.
The power of an appliance is...
a)
the amount of voltage going through it
b)
the amount of energy transferred per second
c)
the amount of charge that passes through per second
4.
Watts is the same as...
a)
Joules per second
b)
Voltage per second
c)
Current per second
5.
The voltage supplied to a circuit is 17 V and the current running through is 10 A. What is the power generated?
a)
170 W
b)
170 A
c)
1.7 V
d)
1.7 W
6.
What will be the current drawn by an electric bulb of 1000 W when it is connected to a source of 220 V?
Remember: I = P/V
Remember: I = P/V
a)
4.55 A
b)
28800 J or 28.8 KJ
c)
80 W
d)
200 W
7.
If an oven has a power of 2000 W and the voltage is 230 V which fuse should you use in the breaker box? A fuse should have some additional capacity so that the circuit does not "trip".
a)
2A
b)
5A
c)
10A
d)
20A
8.
What is the unit of Electrical Power?
a)
Joule
b)
Watt
c)
Where
d)
Amp
9.
The unit of energy is?
a)
Amp
b)
Joule
c)
kiloWatt
d)
Volt
10.
A kilowatt (kW) is how many watts?
a)
10
b)
50
c)
100
d)
1000
11.
Calculate the voltage applied when a 60 watt light-bulb uses a current of 5 amps
a)
300 volts
b)
30 volts
c)
12 volts
d)
0.08 volts
12.
What is the power in Watts of a 20V bulb with 5A of current flowing through it?
a)
100W
b)
100V
c)
6.3W
d)
6.3A
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