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- 1. Multiple Choice
Which statement about a magnet is correct?
A magnet attracts a gold rod.
A magnet does not attract a plastic rod.
A magnet never repels another magnet.
A magnet sometimes repels an unmagnetised nickel rod.
- 2. Multiple Choice
A student wishes to make a permanent magnet. She has an iron rod and a steel rod.
Which rod should she use to make the permanent magnet, and is this rod a hard magnetic material or a soft magnetic material?
rod = iron; type of magnetic material = hard
rod = iron; type of magnetic material = soft
rod = steel; type of magnetic material = hard
rod = steel; type of magnetic material = hard
- 3. Multiple Choice
Two nickel bars are placed close to the N-pole of a bar magnet. The nickel bars become magnetised.
Which row states the pole induced at P, the pole induced at Q, and the type of magnetic force between P and Q?
pole induced at P = N; pole induced at Q = S; force between
P and Q = attraction
pole induced at P = N; pole induced at Q = S; force between
P and Q = repulsion
pole induced at P = S; pole induced at Q = N; force between
P and Q = attraction
pole induced at P = S; pole induced at Q = N; force between
P and Q = repusion
- 4. Multiple Choice
A student wishes to make a permanent magnet. She has an iron rod and a steel rod.
Which rod should she use to make the permanent magnet, and is this rod a hard magnetic material or a soft magnetic material?
rod = iron; type of magnetic material = hard
rod = iron; type of magnetic material = soft
rod = steel; type of magnetic material = hard
rod = steel; type of magnetic material = soft
- 5. Multiple Choice
Which statement about magnetism is correct?
An unmagnetised iron bar becomes magnetised when it is placed near a magnet.
An unmagnetised steel bar can be magnetised by passing a current through it.
The direction of magnetic field lines is from an S-pole to an N-pole.
The N-poles of two magnets attract each other.
- 6. Multiple Choice
In which pair are both materials magnetic?
aluminium and copper
copper and iron
iron and steel
steel and aluminium
- 7. Multiple Choice
The diagram shows the magnetic field around two bar magnets.
Which diagram shows the poles of the magnets?
- 8. Multiple Choice
The diagram shows apparatus that can be used to make a magnet.
Which metal and which power supply are used to make a permanent magnet?
metal = iron; power supply = 6 V a.c.
metal = iron; power supply = 6 V d.c.
metal = steel; power supply = 6 V a.c.
metal = steel; power supply = 6 V d.c.
- 9. Multiple Choice
A wire perpendicular to the page carries an electric current in a direction out of the page. There are four compasses near the wire.
Which compass shows the direction of the magnetic field caused by the current?
A
B
C
D
- 10. Multiple Choice
Which group contains only non-ferrous metals?
aluminium, brass, iron
brass, copper, lead
copper, iron, steel
copper, lead, steel
- 11. Multiple Choice
An electromagnet with a soft-iron core is connected to a battery and an open switch. The soft-iron core is just above some small soft-iron nails.
The switch is now closed, left closed for a few seconds, and then opened.
What do the soft-iron nails do as the switch is closed, and what do they do when the switch is then opened?
as switch is closed - nails jump up; as switch is opened - nails fall down
as switch is closed - nails jump up; as switch is opened - nails stay up
as switch is closed - nails stay down; as switch is opened - nails jump up
as switch is closed - nails stay down; as switch is opened - nails stay down
- 12. Multiple Choice
Which action will demagnetise a magnetised piece of steel?
Cool it in a freezer for several hours.
Hit it repeatedly with a hammer.
Put it in a coil carrying a direct current (d.c.).
Put it near an unmagnetised piece of iron.
- 13. Multiple Choice
A student investigates the force on a bar magnet placed near a current-carrying coil. She carries out three different experiments.
In experiment 1, the magnet is attracted to the coil.
Which row shows what happens in the other two experiments?
experiment 2: magnet attracted; experiment 3: magnet attracted
experiment 2: magnet attracted; experiment 3: magnet repelled
experiment 2: magnet repelled; experiment 3: magnet attracted
experiment 2: magnet repelled; experiment 3: magnet repelled
- 14. Multiple Choice
Three cores of different metals, P, Q and R, are placed inside identical coils of wire.
At least one of the metals is non-ferrous. The cores are held above some iron nails.
The top three diagrams show what happens when there is a current in the coils.
The three diagrams in the second row below show what happens when the current is then switched off in each coil.
Which row identifies whether the core metals are ferrous or non-ferrous?
ferrous = P; non-ferrous = Q and R
ferrous = P and Q; non-ferrous = R
ferrous = Q and R; non-ferrous = P
ferrous = R; non-ferrous = P and Q
- 15. Multiple Choice
Which procedure may be used to demagnetise a steel bar?
cooling it in a freezer for several hours
earthing it with a copper wire for several seconds
removing it slowly from a coil carrying an alternating current (a.c.)
rubbing it in one direction with a woolen cloth
- 16. Multiple Choice
Which statement about a permanent bar magnet is correct?
It is made from a soft magnetic material.
It repels a non-magnetic material.
Its field lines cross each other where the magnetic field is strong.
Its N-pole repels the N-pole of another magnet.
- 17. Multiple Choice
The diagram shows two magnets and two iron rods placed in a line.
Which magnetic poles are induced at the ends J and K of the iron rods?
pole induced at end J = N; pole induced at end K = N
pole induced at end J = N; pole induced at end K = S
pole induced at end J = S; pole induced at end K = N
pole induced at end J = S; pole induced at end K = S
- 18. Multiple Choice
Two iron nails hang from a bar magnet.
Which diagram shows the magnetic poles induced in the nails?
A
B
C
D
- 19. Multiple Choice
The ends of three metal rods are tested by holding end Q of rod 1 close to the others in turn.
The results are as follows.
End Q: attracts end R,
attracts end S,
attracts end T,
repels end U.
Which of the metal rods is a magnet?
rod 1 only
rod 1 and rod 2
rod 1 and rod 3
rod 3 only
- 20. Multiple Choice
The diagram shows two bar magnets, stored with metal keepers across the ends. The keepers help to keep the magnets magnetised.
The material used for the keepers becomes strongly magnetised when placed in contact with the
magnets, but does not remain magnetised when taken away from the magnets.
What is a suitable metal to use for the magnets and what is a suitable metal to use for the keepers?
metal for magnets = iron; metal for keepers = iron
metal for magnets = iron; metal for keepers = steel
metal for magnets = steel; metal for keepers = iron
metal for magnets = steel; metal for keepers = steel
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