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WorksheetsElectrical Power
Total questions: 16
Worksheet time: 24mins
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.
Watts is the same as...
a)
Joules per second
b)
Voltage per second
c)
Current per second
4.
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
5.
Calculate the electric power of an electrical appliance in which 10 A of current is flowing through a resistor of 2 ohms.
Remember: V=IR and P=VI
Remember: V=IR and P=VI
a)
80 W
b)
200 W
c)
2.5 A
d)
22.5 KJ
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 what fuse is required?
a)
3A
b)
5A
c)
13A
8.
A pair of 15-watt computer speakers are connected to a 12-volt power supply. What is the electric current running through the speakers?
a)
1.25 A
b)
0.8 A
c)
12.5 A
d)
180 A
9.
What is the unit of Electrical Power?
a)
Joule
b)
Watt
c)
Where
d)
Amp
10.
The unit of energy is?
a)
Amp
b)
Joule
c)
kiloWatt
d)
Volt
11.
A kilowatt (kW) is how many watts?
a)
10
b)
50
c)
100
d)
1000
12.
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
13.
What is the power of a 20V bulb with 5A through it?
a)
100W
b)
100V
c)
6.3W
d)
6.3A
14.
Heater is 240V and 2200W. What is the suitable fuse rating for the heater?
a)
10 A
b)
13 A
c)
3 A
d)
5 A
15.
Your oven has a power of 5000 watts. How many kilowatts is this?
(a)
16.
What is the power rating of a home appliance (in kilowatts) that uses 8 amps of current plugged into a 120 Volt outlet?
(a)
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