WorksheetsEnergy and Power
Total questions: 10
Worksheet time: 5mins
Name
Class
Date
1.
Is the amount of energy being transferred over a period of time.
a)
Power
b)
Energy
c)
Seconds
d)
Joules
2.
What is the unit of measurement for power?
a)
Joules
b)
Watts
c)
Voltage
d)
Calories
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 type of appliances transfer the most energy per second?
a)
Those that transfer energy into heat.
b)
Those that transfer energy into light.
c)
Those that transfer energy into sound.
d)
Those that transfer energy into movement.
6.
Which appliance transfers the most energy per second?
a)
Clock
b)
Lamp
c)
Desktop Computer
d)
Iron
7.
What are we paying electrical companies?
a)
The power of the appliance per hour of use.
b)
We electricity used per hour.
c)
The impact of electricity use on the environment.
d)
The efficiency of the appliance.
8.
What is the unit of energy that electrical companies use?
a)
kJ
b)
kW
c)
kJ/hour
d)
kW/hour
9.
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
10.
Which of the following will help us cut on electricity bills?
a)
Using high power appliances longer.
b)
Using high power appliances less often.
c)
Using appliances that produce heat energy.
d)
Using less efficient appliances.
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