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HIA International — Grade 7

Unit 1: Breathing and respiration

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Unit 2: Dissolving, solubility and chromatography

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Unit 3: Forces, motion and pressure

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Unit 4: Ecosystems

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Unit 5: Atoms, purity and climate

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Unit 6: Light and objects in space

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Unit 7: Nutrition, health and movement

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Unit 8: Energy changes and reactions of metals

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Unit 9: Magnetism and electromagnets

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Quiz

9.1 Magnetic Fields

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Magnetic Fields Checkpoint Physics quiz: free practice for Cambridge Checkpoint Physics 0893. Work through this Magnetic Fields Checkpoint Physics quiz and get instant feedback on every answer. If you get stuck, review the 4.1 Magnetic fields lesson. More practice: Cambridge Checkpoint Physics 0893 — all units. Syllabus: Cambridge Lower Secondary programme.

  • Questions count: 50
  • Passing grade: B+
  • Time limit:
Start Quiz
1.
Each object is matched with how it behaves near a bar magnet. Which pairing is correct?
Cobalt disc – attracted by either pole
Brass screw – attracted by the N pole only
Unmagnetised iron nail – repelled by the S pole
Aluminium foil – attracted by the S pole only
2.
A cupboard door has a small magnet on it and a steel plate on the frame. Why does the door stay shut?
The magnet repels the steel plate, pushing the door
The magnet attracts the steel plate
Steel plates are always magnets with N poles
The magnetic field only acts on wooden doors
3.
Each use of magnets is matched with the idea it relies on. Which pairing is correct?
Fridge-door catch – like poles repel to keep it shut
Motor – the field is weakest in the gap between the poles
Compass – its copper needle lines up with the field
Maglev train – like poles repel to lift it
4.
Two bar magnets are placed with their north poles facing each other. The field lines are drawn and point X is exactly halfway between them. What would a plotting compass placed at X do?
Dr Dabour Hub Academy - figure 1
Point firmly towards the left-hand magnet
Point straight up the page, along a strong field line
Not settle in any direction, as the forces cancel there
Spin quickly round because the field is strongest there
5.
Sofia tested six objects with a bar magnet. Which of her results must be a mistake, if each object is made only of the material listed?
The nickel coin
The brass key
The steel paper clip
The aluminium drinks can
6.
The poles of this grey magnet are not labelled. Four plotting compasses have been placed around it. Which end of the magnet is its north pole, and why?
Dr Dabour Hub Academy - figure 2
End X, because the needles point towards X
End Y, because the needles point away from Y
End Y, because the needles point towards Y
Neither end; the needles show it is not a magnet
7.
The diagram shows the field lines around a bar magnet and four points, A to D. At which point would a steel pin feel the strongest magnetic force?
Dr Dabour Hub Academy - figure 3
At point A
At point B
At point C
At point D
8.
Which list contains only magnetic materials?
Cobalt, steel, nickel
Iron, aluminium, cobalt
Steel, copper, nickel
Nickel, brass, iron
9.
Mei put two grey bar magnets under paper and sprinkled iron filings on top. The pattern is shown. What can she conclude about the two ends marked "?" that face each other?
Dr Dabour Hub Academy - figure 4
They are both north poles, as the filings meet
They are unlike poles: one is N and one is S
They are both south poles, as the lines join up
Magnet 2 is the N pole because it is on the right
10.
Hassan used a magnetic field sensor to measure the field at different distances from the north pole of two magnets, A and B. What do his results show?
Dr Dabour Hub Academy - figure 5
Both fields get stronger as the distance increases
B is stronger, as its line is flatter than A's line
The two magnets have equal fields at a distance of 5 cm
Magnet A has the stronger field at every distance
11.
Which single observation proves that a grey metal bar is a magnet?
Both of its ends attract a steel paper clip
It is pulled towards both poles of a known magnet
One of its ends pushes away the N pole of a known magnet
It is heavy and shiny, like the bar magnets in the lab
12.
Think about the field pattern produced by each arrangement of magnets. Which pairing is correct?
Single bar magnet – straight parallel lines only
Two S poles facing – lines push apart, leaving a neutral point
Horseshoe magnet – lines loop from its S pole to its N pole
N facing S – lines curve away from each other in the gap
13.
Which statement correctly describes magnetic field?
a material such as iron, nickel or cobalt that is attracted by a magnet
the end of a magnet that points north, where field lines leave the magnet
the region around a magnet where a magnetic material feels a force
the tiny pieces of iron sprinkled on paper to reveal the shape of a field
14.
Which of these is a magnetic material?
Gold
Aluminium
Nickel
Copper
15.
Each observation from a magnet practical is matched with a conclusion. Which pairing is correct?
Filings crowd round the middle – the field is strongest in the middle
A bar attracts a paper clip – the bar must be a magnet
Needle swings strongly near an end – the field is strongest at the poles
Two ends attract each other – both ends must be N poles
16.
Magnetic field lines go from:
East to west
North pole to south pole
South to north inside air
Centre outwards only
17.
Tom has plotted one field line from the N pole to the S pole of a magnet. How can he build up a fuller picture of the field?
Plot more lines from different points near the N pole
Plot the same line again, starting from the same dot
Rub out the arrows and draw the line thicker
Swap the compass for a copper coin and repeat
18.
Amir slid a plotting compass slowly towards a magnet and recorded when the needle first moved. What is the best value for the mean distance?
11.9 cm, leaving out trial 3
13.5 cm, using all four trials
18.0 cm, because it is the biggest value
12.0 cm, using trial 1 only as it came first
19.
Where is the field of a horseshoe magnet strongest and most even?
At the curved bend, furthest from both poles
Just outside the magnet, behind the bend
Only at the very tip of the north pole
In the gap between its two poles
20.
Kwame placed four plotting compasses, 1 to 4, around a bar magnet and drew the needles. One needle has been drawn pointing the wrong way. Which compass is drawn incorrectly?
Dr Dabour Hub Academy - figure 6
Compass 1
Compass 2
Compass 3
Compass 4
21.
A compass shows the shape of a magnetic field by:
Repelling all metals
Lining up with the field lines
Changing colour
Heating up
22.
Grace concluded from her results that magnet A is stronger than magnet B. Why is this conclusion not valid?
She should have used copper clips for every magnet
The size of the paper clips was not kept the same
Magnet C picked up fewer clips than magnet A did
She tested three magnets instead of only two magnets
23.
Leo recorded what happened when he brought poles of two bar magnets together. Which test has an incorrect result?
Test number 1
Test number 2
Test number 4
Test number 3
24.
Kofi compared two ways of showing the field around a magnet. Using the table, identify methods X and Y.
X is a plotting compass; Y is iron filings
X and Y are both iron filings, tapped differently
X is iron filings; Y is a plotting compass
X is a copper coin; Y is an aluminium sheet
25.
Why should the paper be tapped gently after iron filings are sprinkled over a magnet?
To magnetise the paper so it attracts the filings
To push all of the filings to the middle of the magnet
To remove filings that are not made of iron
So the filings can move and line up with the field
26.
Which term is described as: the region around a magnet where a magnetic material feels a force?
magnetic field
attraction
north pole
plotting compass
27.
Which term is described as: the end of a magnet that points north, where field lines leave the magnet?
north pole
magnetic field
field line
south pole
28.
Match the term to its correct meaning: north pole
the push between two like poles
the end of a magnet that points north, where field lines leave the magnet
a material such as iron, nickel or cobalt that is attracted by a magnet
the pull between two unlike poles
29.
To show both the shape and the direction of a magnetic field, you should use a _____ rather than iron filings.
sheet of paper
plotting compass
steel ruler
copper coin
30.
Field lines drawn close together show a _____ field.
flat
weaker
stronger
reversed
31.
When the N pole of one magnet faces the S pole of another, the field lines _____ the gap between them.
bend away from
stop at the edge of
cross over in
join straight across
32.
The only reliable test that an object is a magnet is that it _____ another magnet.
can repel
can attract
is heavier than
is the same colour as
33.
The area around a magnet where it has an effect is its magnetic __________.
circuit
core
field
pole
34.
An aluminium drinks can is not attracted to a magnet because aluminium is not a _____.
solid substance
good conductor
magnetic material
shiny material
35.
A steel paper clip is attracted to the north pole of a bar magnet and also to its south pole. True or false?
False – steel is only attracted to a north pole
False – steel is only attracted to a south pole
True, but only if the paper clip is also a magnet
True – either pole attracts steel
36.
A magnetic field can act through a sheet of paper or plastic. - True or false?
True
False
37.
Next to a bar magnet, the north-seeking end of a plotting compass needle points along the field line towards the magnet's south pole. True or false?
False – it always points towards the north pole
True – it follows the line from N to S
False – it points at right angles to field lines
True, but only when the compass touches the magnet
38.
Iron filings sprinkled round a magnet show the shape of its field but cannot show the direction of the field lines. True or false?
False – the filings point from N to S like arrows
False – iron filings show only the direction
True – you need a compass for direction
True, but only when the magnet is a horseshoe
39.
A strong bar magnet can pick up a piece of copper wire, because copper is a metal. True or false?
True – all metals are attracted to magnets
True – but only if the copper wire is thin
False – copper is repelled by the north pole
False – copper is not magnetic
40.
Ravi slides a plotting compass further away from a magnet. The needle is turned less strongly, because the field is weaker there. True or false?
True – the field weakens with distance
False – the field is the same everywhere around it
False – the field gets stronger further from it
True, but only if the compass is on the S side
41.
Cobalt and nickel are magnetic materials, in the same way that iron is. True or false?
False – only iron and steel are magnetic
False – cobalt is magnetic but nickel is not
True, but only when they are heated strongly
True – both are magnetic
42.
Aisha drew the magnetic field of a bar magnet, shown in the diagram. Statement: her drawing shows the field correctly. True or false?
Dr Dabour Hub Academy - figure 7
False – her arrows point from S to N
True – the lines are closest at the poles
True – the arrows show the field from S to N
False – field lines should be perfectly straight
43.
Like poles attract each other. - True or false?
True
False
44.
Farah hung chains of steel paper clips from different points along a bar magnet. Statement: her results support the idea that the magnetic field is strongest at the poles. True or false?
False – the middle should hold the most clips
True – the ends held the most clips
False – the ends held different numbers of clips
True – the middle held no clips as it is copper
45.
Lena says: "My front-door key stuck to the magnet, so the key must be a magnet itself." True or false?
False – unmagnetised steel is also attracted
True – only magnets can be attracted to magnets
True – the key was pulled, so it has N and S poles
False – keys are made of copper, so it cannot stick
46.
In the gaps between the field lines drawn round a magnet there is no magnetic field at all. True or false?
True – the field only exists along each line
False – lines are a model; the field is everywhere
True – a compass in a gap would not move
False – but only near the poles is there a field
47.
Two magnetic field lines may cross each other at a place where the field is very strong. True or false?
True – they cross where the lines are crowded
True – they always cross at the two poles
False – field lines never cross
False – they only cross in a horseshoe magnet
48.
Field lines drawn close together show a weaker field. - True or false?
True
False
49.
A magnetic field is the region where light cannot travel. - True or false?
True
False
50.
A maglev train floats above its track because magnets with like poles facing are arranged to repel each other. True or false?
False – unlike poles attract and lift it up
False – the train is lifted by iron filings
True – like poles push the train up
True, but only when the train is not moving
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Part of Unit 9: Magnetism and electromagnets — see every lesson and quiz in this unit.
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