WorksheetsTransferring energy electrically
Total questions: 10
Worksheet time: 5mins
Name
Class
Date
1.
What is the main energy transfer that takes place in a mobile phone?
a)
By radiation (sound and light) from a chemical energy store to a kinetic energy store
b)
Electrically from a sound and light energy store to a chemical energy store
c)
By radiation (sound and light) from a kinetic energy store to a chemical energy store
d)
Electrically from a kinetic energy store to a sound and light energy store
2.
Which statement about energy transferred electrically is NOT true?
a)
Energy transferred electrically is a useful energy transfer pathway
b)
Energy transferred electrically cannot be stored
c)
Energy can be transferred electrically from chemical energy stored in cells
d)
Energy transferred electrically can be stored as chemical energy in cells
3.
What does a cell do in an electric circuit?
a)
It measures voltage
b)
It changes electrical energy into other energy stores
c)
It measures electric current
d)
It pushes electric current around a circuit
4.
What is used to measure the amount of energy transferred by a component in an electric circuit?
a)
An ammeter connected in series
b)
An ammeter connected in parallel
c)
A voltmeter connected in series
d)
A voltmeter connected in parallel
5.
Which statement about the current in an electrical circuit is NOT true?
a)
Current is not used up
b)
Current is measured by an ammeter
c)
Current is the amount of charge per second
d)
Current is measured in volts
6.
How is energy transferred electrically from a power station to homes and businesses?
a)
By the National Grid
b)
By road
c)
By computers
d)
By batteries
7.
What unit is used by suppliers of electricity to measure energy transferred electrically?
a)
volt
b)
kilogram-hour
c)
kilometre-hour
d)
kilowatt-hour
8.
Which part of a power station is turned by moving steam?
a)
boiler
b)
turbine
c)
generator
d)
cooling tower
9.
What energy change takes place in the generator at a power station?
a)
Mechanically from chemical energy
b)
By heating from chemical energy
c)
Electrically from kinetic energy
d)
By radiation from kinetic energy
10.
A car engine wastes 75 J by heating and radiation (as sound) from 100 J of chemical energy stored in the fuel. What is the engine's efficiency?
a)
25%
b)
75%
c)
100%
d)
133%
100 %
