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Worksheets9J More electricity
Total questions: 20
Worksheet time: 10mins
An object’s weight:
is caused because it is pulled towards the Earth.
is caused by the Earth’s magnetic field.
is caused by the air pushing down on it.
stays the same, even if its mass changes.
The direction ‘down’ is:
the same everywhere.
at right angles to the ground.
towards the centre of the Earth.
different under water.
Which statement is not true?
The Earth attracts objects because it has a large mass.
You are attracting your pen with a small force of gravity.
Only large objects like the Earth produce a force of gravity.
Your body is attracting the Earth.
A bag of sugar has a mass of 1 kg. What is its weight?
1 N
10 N
10 kg
0.1 N
Gravity is less on the Moon than on the Earth because:
the Moon is smaller than the Earth.
the Moon has a bigger mass than the Earth.
the Moon is bigger than the Earth.
the Moon has less mass than the Earth.
On Mars, the strength of gravity is 9 N/kg. If your mass is 50 kg, how much would you weigh on Mars?
450 N
90 N
50 N
45 N
Gravity:
gets less if two objects get closer together.
gets bigger if two objects get further apart.
gets less if two objects get further apart.
does not depend on distance.
The units for voltage are:
amps.
ohms.
volts.
metres.
Voltage is:
another name for current.
a way of counting how many cells there are in a circuit.
a way of saying how much energy is being pushed around the circuit.
something that makes it difficult for electricity to flow.
Which statement is not true for a series circuit?
The voltage is always the same for all the components.
The voltage across each component depends on how much energy it uses.
The voltage across all the components adds up to the voltage across the cell.
The voltage can be measured using a voltmeter.
Which of these items is not needed to make a working circuit?
connecting wires
a switch
a component such as a bulb
a cell
Which instrument would you use to measure current?
an ammeter
a cell
a motor
a voltmeter
One ammeter in a series circuit is reading 3 A.
What is the reading on the other ammeter?
1A
2A
3A
4A
We need to use models to help us to think about electricity because:
it makes electricity more fun
charges are too small to see
charges are imaginary
electricity is not real.
An electric current is:
a source of energy
a kind of liquid inside the wires
tiny charged particles called electrons flowing through the wires
tiny particles called volts flowing through the wires.
Parallel circuits are used for house lights:
so they can all be switched on and off together.
so you know when one breaks, because all the others go off.
so they use a bigger current.
so they can all be switched on and off separately.
An obstacle in a race represents:
a high resistance, because it is hard for runners to get over it
a low resistance, because it is hard for runners to get over it
a high resistance, because it is easy for runners to get over it
a wire, because people move along the race track.
Resistance, in ohms, is measured using:
current / voltage
current + voltage
current - voltage
current x voltage
Which statement is not true?
A south pole repels a north pole.
A south pole repels a south pole.
A north pole attracts a south pole.
A north pole repels a north pole.
A magnetic field is:
a piece of ground with lots of iron in it.
the space around a magnet where it attracts magnetic materials.
the space around a magnet where it attracts all metals.
the space around a magnet where it repels magnetic materials.
