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WorksheetsCalculating WAttage
Total questions: 17
Worksheet time: 28mins
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.
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
7.
What is the unit of Electrical Power?
a)
Joule
b)
Watt
c)
Where
d)
Amp
8.
A kilowatt (kW) is how many watts?
a)
10
b)
50
c)
100
d)
1000
9.
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
10.
What is the power of a 20V bulb with 5A through it?
a)
100W
b)
100V
c)
6.3W
d)
6.3A
11.
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
12.
Your oven has a power of 5000 watts. How many kilowatts is this?
(a)
13.
What is the power rating of a home appliance (in kilowatts) that uses 8 amps of current plugged into a 120 Volt outlet?
(a)
14.
Electricity is:
a)
Flowing electrons
b)
Still electrons
c)
voltage x wattage
d)
amps x watts
15.
Which equation is used to calculate power?
a)
R/V²
b)
R x I²
c)
I² x V
d)
V x R²
16.
Calculate the power in the circuit.
a)
27m W
b)
27 W
c)
9 W
d)
2.7m W
17.
A toaster is plugged into a 80 W household circuit. It draws 2 amps of current. What is the resistance?
(a)
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