WorksheetsP1.3 Generating Electricity
Total questions: 13
Worksheet time: 7mins
Name
Class
Date
1.
What is the wasted energy from a hairdryer?
a)
Kinetic
b)
Thermal
c)
Sound
2.
Which of these has kinetic energy as its useful energy output?
a)
radio
b)
TV
c)
drill
d)
toaster
3.
Why are clockwork radios useful in remote locations
a)
they look good
b)
they don't need batteries
c)
they don't need water
d)
they sound good
4.
Electric power is measured in....?
a)
newtons
b)
watts
c)
joules
d)
decibels
5.
What is a watt?
a)
a bad physics pun?
b)
the rate at which energy is transfered
c)
the amount of energy used
d)
the time it takes to boil a kettle
6.
which of these is most likely to be a light bulb?
a)
1 W
b)
100 W
c)
1 000 W (1 kW)
d)
1 000 000 W (1 MW)
7.
How many joules does a 60 W light bulb use in 2 minutes?
a)
2 x 60 = 120 J
b)
2 x 60 x 60 = 7 200 J
c)
60 / 2 = 30 J
8.
A motor transfers 10 000 J of energy in 25 s. What is its power?
a)
10 000 x 25 = 250 000 W
b)
10 000 / 25 = 400 W
c)
10 000 x 25 = 250 000 J
d)
10 000 / 25 = 400 J
9.
Inside a power station, thermal energy is converted into.. ..?
a)
bananas
b)
nuclear energy
c)
kinetic energy
d)
sound energy
10.
The carbon dioxide released by a fuel is balanced by the amount of carbon it absorbs when it is growing is a definition of.. ..
a)
carbon off-setting
b)
carbon neutralisation
c)
carbon neutrality
11.
The only means of generating electricity that does not involve a magnet & coil is.. .. ?
a)
solar
b)
wind
c)
wave
d)
nuclear
12.
what is used to raise the voltage on the national grid
a)
transformer
b)
step-down transformer
c)
step-up transformer
13.
A disadvantage of tidal energy is.. .. ?
a)
we cannot predict when the energy will be available
b)
the energy is only available at certain times
c)
It costs too much to have the tides come in and go out
100 %
