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WorksheetsElectrical Power
Total questions: 10
Worksheet time: 15mins
Name
Class
Date
1.
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
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.
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
8.
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
9.
What is the unit of Electrical Power?
a)
Joule
b)
Watt
c)
Where
d)
Amp
10.
What is the power of a 20V bulb with 5A through it?
a)
100W
b)
100V
c)
6.3W
d)
6.3A
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