WorksheetsEnergy Power Time
Total questions: 8
Worksheet time: 4mins
Name
Class
Date
1.
What is the unit of measurement for power?
a)
Joules
b)
Watts
c)
Voltage
d)
Calories
2.
The equation for POWER is:
a)
power = mass x time
b)
power = Energy / time
c)
power = time / water
d)
power = Energy x time
3.
How much energy does this appliance transfer per second?
a)
240 V
b)
50 Hz
c)
150 W
d)
N533
4.
A microwave has a power rating of 1550 W. How much energy does it transfer per second?
a)
1.550 Joules
b)
15.50 Joules
c)
155.0 Joules
d)
1550 Joules
5.
Which appliance transfers the most energy per second?
a)
Clock
b)
Lamp
c)
Desktop Computer
d)
Iron
6.
A lamp has a 120 W power rating. It is left on for 30 seconds. How much energy did it use?
a)
3600 J
b)
36 J
c)
450 J
d)
nah
7.
A kettle transfers 1000J of energy every 2 seconds. Calculate its power.
a)
2000 Watts
b)
1000 Watts
c)
500 Watts
d)
cannot be determined
8.
A microwave used 75 kJ of energy to heat up a lasagna. If the microwave was 750 W how long did this take?
a)
10 minutes
b)
100 seconds
c)
5000 hours
d)
i don't eat lasagna I'm not Garfield
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