A aluminium

B brass

C iron

D steel 26 The diagram shows two magnets and two iron rods placed in a line.

N S

magnet ironrod

N S

magnet

J

ironrod

K

Which magnetic poles are induced at the ends J and K of the iron rods?

pole induced

at end J pole induced

at end K

A N N

B N S

C S N

D S S

25 Which metal is suitable to use to make a permanent magnet?

What material is the splinter made from?

A aluminium

B glass

C iron

D wood

29 An electromagnet is used to remove a splinter from an eye.

MAGNETS CLASSIFIED P2 IGCSE PHYSICS 0625 - Page 1

27 In which pair are both materials magnetic?

A aluminium and copper

B copper and iron

C iron and steel

D steel and aluminium 28 The diagram shows the magnetic field around two bar magnets.

Which diagram shows the poles of the magnets?

A N S N S

B N S S N

C S N N S

D S N S N

26 An electromagnet is used to remove a splinter from an eye.

What material is the splinter made from?

A aluminium

B glass

C iron

D wood

MAGNETS CLASSIFIED P2 IGCSE PHYSICS 0625 - Page 2

26 In which pair are both materials magnetic?

A aluminium and copper

B copper and iron

C iron and steel

D steel and aluminium 27 Which methods could be used to demagnetise a magnet?

method 1: place it in an east-west direction and hammer it

method 2: place it in an east-west direction and heat it until it is red hot

method 3: pull it slowly from a coil that is carrying an alternating current

method 4: put it slowly into a coil that is carrying a direct current

A methods 1, 2 and 3

B methods 2, 3 and 4

C methods 1 and 2 only

D methods 3 and 4 only 27 A small compass is placed close to a strong bar magnet, the same distance from each end.

Which diagram shows the direction in which the compass needle points?

N

A

S

N

B

S

N

C

S

N

D

S

compass compass compass compass

28 A student wishes to magnetise two steel bars X and Y.

She places bar X in a coil connected to a d.c. power supply.

She places bar Y parallel to a magnetic field and hammers it.

Which bars become magnetised?

A X and Y

B X only

C Y only

D neither X nor Y

MAGNETS CLASSIFIED P2 IGCSE PHYSICS 0625 - Page 3

25 A small compass is placed close to a strong bar magnet, the same distance from each end.

Which diagram shows the direction in which the compass needle points?

N

A

S

N

B

S

N

C

S

N

D

S

compass compass compass compass

26 A bar magnet can be demagnetised by hammering it for a long time or by slowly removing it from

a coil connected to a power supply.

Which row completes the descriptions of how these processes are carried out?

hammering bar magnet

for a long time with slowly removing bar magnet

from a coil connected to

A magnet aligned E-W a d.c. power supply

B magnet aligned E-W an a.c. power supply

C magnet aligned N-S a d.c. power supply

D magnet aligned N-S an a.c. power supply

27 Which diagram shows the magnetic field around a bar magnet?

A B

C D

N S N S

N S N S

MAGNETS CLASSIFIED P2 IGCSE PHYSICS 0625 - Page 4

A Aluminium is a ferrous metal.

B A steel magnet can be demagnetised by heating it.

C The core of an electromagnet is usually made of steel.

D The magnetic field lines around a bar magnet are evenly spaced. 27 Two soft-iron rods are placed end to end inside a coil which is connected to a battery.

soft-iron rod soft-iron rod

coil

The connections from the battery to the coil are now reversed.

What happens to the soft-iron rods in each case?

battery connections

as shown battery connections

reversed

A rods attract rods attract

B rods attract rods repel

C rods repel rods attract

D rods repel rods repel

26 Which statement about magnetism is correct?

27 An old and expensive steel watch becomes magnetised.

The owner wants to use the watch again. He must demagnetise the watch.

What is the best method to do this?

A Heat it until it glows red hot.

B Pass direct current though it.

C Place it in a plastic bag and put the bag in hot water for several hours.

D Place it in a solenoid that carries alternating current and then slowly remove it.

MAGNETS CLASSIFIED P2 IGCSE PHYSICS 0625 - Page 5

25 Two iron nails hang from a bar magnet.

Which diagram shows the magnetic poles induced in the nails?

A

N

N

N

S

S

S

B

N

S

N

S

N

S

C

N

N

S

S

S

N

D

N

S

S

S

N

N

barmagnet

34 An electric current is passed through a coil of wire.

coil of wire

Which diagram shows the shape of the magnetic field produced in the middle of the coil?

A B

C D

MAGNETS CLASSIFIED P2 IGCSE PHYSICS 0625 - Page 6

26 Which row correctly shows whether copper and steel are ferrous or non-ferrous?

copper steel

A ferrous ferrous

B ferrous non-ferrous

C non-ferrous ferrous

D non-ferrous non-ferrous

27 A steel magnet is placed inside a coil of wire. There is a large alternating current in the coil. The

magnet is slowly moved out of the coil to position P.

steel magnet movedout of coil

12 V a.c.

P

coil of wire

How has the steel changed, if at all, when it reaches position P?

A It has become a stronger magnet.

B It has become demagnetised.

C The poles have changed ends.

D There has been no change.

35 A strong electromagnet is used to attract pins.

core

pinscoil

current

What happens when the current in the coil is halved?

A No pins are attracted.

B Some pins are attracted, but not as many.

C The same number of pins is attracted.

D More pins are attracted.

MAGNETS CLASSIFIED P2 IGCSE PHYSICS 0625 - Page 7

magnet is held close to the first magnet.

The arrangements are shown in the diagrams.

g100

diagram 1

S

N

g

diagram 2

S

N

g

diagram 3

S

N

S

N

iron bar

Which row gives the balance reading in diagram 2 and in diagram 3?

balance reading in diagram 2

/ g balance reading in diagram 3

/ g

A less than 100 less than 100

B less than 100 more than 100

C more than 100 less than 100

D more than 100 more than 100

25 A magnet is placed on a balance. The balance reading changes when an iron bar or another

28 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 type of magnetic

material

A iron hard

B iron soft

C steel hard

D steel soft

MAGNETS CLASSIFIED P2 IGCSE PHYSICS 0625 - Page 8

26 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.

electromagnet

soft-iron coresoft-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 as switch is opened

A nails jump up nails fall down

B nails jump up nails stay up

C nails stay down nails jump up

D nails stay down nails stay down

26 Which action will demagnetise a magnetised piece of steel?

A Cool it in a freezer for several hours.

B Hit it repeatedly with a hammer.

C Put it in a coil carrying a direct current (d.c.).

D Put it near an unmagnetised piece of iron.

27 Which statement about a magnet is correct?

A A magnet attracts a gold rod.

B A magnet does not attract a plastic rod.

C A magnet never repels another magnet.

D A magnet sometimes repels an unmagnetised nickel rod.

MAGNETS CLASSIFIED P2 IGCSE PHYSICS 0625 - Page 9

28 A student investigates the force on a bar magnet placed near a current-carrying coil. She carries

out three different experiments.

N S

magnetattracted

to coil

experiment 1

N S

experiment 2

S N

experiment 3

In experiment 1, the magnet is attracted to the coil.

Which row shows what happens in the other two experiments?

experiment 2 experiment 3

A magnet attracted magnet attracted

B magnet attracted magnet repelled

C magnet repelled magnet attracted

D magnet repelled magnet repelled

26 What is wrong with this labelled diagram of a permanent magnet?

N S

iron disc

A The cross-section should be rectangular.

B The length should be greater than the diameter.

C The magnet should be made of steel.

D The N-pole and the S-pole should be reversed. 27 Which statement about magnetism is correct?

A An unmagnetised iron bar becomes magnetised when it is placed near a magnet.

B An unmagnetised steel bar can be magnetised by passing a current through it.

C Steel is used as the core of an electromagnet.

D When an iron bar has been magnetised, it is difficult to demagnetise it.

MAGNETS CLASSIFIED P2 IGCSE PHYSICS 0625 - Page 10

27 Two nickel bars are placed close to the N-pole of a bar magnet.

The nickel bars become magnetised.

S N P Q

magnet nickel bars

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 pole induced

at Q force between

P and Q

A N S attraction

B N S repulsion

C S N attraction

D S N repulsion

28 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 type of magnetic

material

A iron hard

B iron soft

C steel hard

D steel soft

MAGNETS CLASSIFIED P2 IGCSE PHYSICS 0625 - Page 11

26 In a child’s toy, a metal rod is used to lift metal fish out of a toy pond. The fish are magnetically attracted to the end of the rod. There is no magnetic force between the fish.

toy pond

metal rod

metal fish

What are possible materials from which the fish and the rod are made?

fish rod

A aluminium soft iron

B aluminium steel

C soft iron soft iron

D soft iron steel 27 Which diagram shows the pattern of magnetic field lines around a bar magnet?

N S

A

N S

B

N S

C

N S

D

MAGNETS CLASSIFIED P2 IGCSE PHYSICS 0625 - Page 12

27 In which way are a bar magnet and an electromagnet similar?

A A bar magnet and an electromagnet are always magnetised when stored.

B A bar magnet and an electromagnet can both be used to separate magnetic and non-magnetic materials.

C A bar magnet can be made of steel and an electromagnet uses a steel core.

D The magnetic field strength of a bar magnet and of an electromagnet can both be varied.

26 From which materials are the coil and the core of an electromagnet made?

coil core

A copper soft iron

B copper steel

C soft iron copper

D steel soft iron

25 What is the most effective method of demagnetising a bar magnet?

A placing the magnet in a solenoid carrying a large alternating current and gradually decreasing the current

B placing the magnet in a solenoid carrying a large direct current and gradually decreasing the current

C placing the magnet in a solenoid that produces a magnetic field in the opposite direction to the magnet

D placing the magnet next to an identical bar magnet with its poles in the opposite direction 26 A magnet near a coil of wire is attracted to the coil only when there is a current in the coil.

Which statement explains this force of attraction?

A The coil of wire has its own gravitational field.

B The coil of wire is made from soft iron.

C The current in the coil of wire creates a magnetic field.

D The current in the coil of wire induces a charge on the magnet.

MAGNETS CLASSIFIED P2 IGCSE PHYSICS 0625 - Page 13

24 A student demagnetises a magnetised steel bar.

He places the bar in a solenoid connected to a power supply. He then removes the bar from the solenoid.

Which row indicates the most effective way of demagnetising the bar?

type of power supply

speed to remove bar

A a.c. fast

B a.c. slow

C d.c. fast

D d.c. slow

26 A steel magnet is placed in a coil and demagnetised.

Which type of current is established in the coil, and how is the current changed?

A a direct current in the coil, then reduce the current quickly to zero

B a direct current in the coil, then reduce the current slowly to zero

C an alternating current in the coil, then reduce the current quickly to zero

D an alternating current in the coil, then reduce the current slowly to zero

26 A steel magnet is placed in a coil and demagnetised.

Which type of current is established in the coil, and how is the current changed?

A a direct current in the coil, then reduce the current quickly to zero

B a direct current in the coil, then reduce the current slowly to zero

C an alternating current in the coil, then reduce the current quickly to zero

D an alternating current in the coil, then reduce the current slowly to zero

26 A steel magnet is placed in a coil and demagnetised.

Which type of current is established in the coil, and how is the current changed?

A a direct current in the coil, then reduce the current quickly to zero

B a direct current in the coil, then reduce the current slowly to zero

C an alternating current in the coil, then reduce the current quickly to zero

D an alternating current in the coil, then reduce the current slowly to zero

26 A steel magnet is placed in a coil and demagnetised.

Which type of current is established in the coil, and how is the current changed?

A a direct current in the coil, then reduce the current quickly to zero

B a direct current in the coil, then reduce the current slowly to zero

C an alternating current in the coil, then reduce the current quickly to zero

D an alternating current in the coil, then reduce the current slowly to zero

26 A steel magnet is placed in a coil and demagnetised.

Which type of current is established in the coil, and how is the current changed?

A a direct current in the coil, then reduce the current quickly to zero

B a direct current in the coil, then reduce the current slowly to zero

C an alternating current in the coil, then reduce the current quickly to zero

D an alternating current in the coil, then reduce the current slowly to zero

27 A permanent magnet is placed close to a bar of soft iron.

S N P Qpermanentmagnet soft iron bar

What are the polarities of end P and of end Q?

end P end Q

A N N

B N S

C S N

D S S

25 The diagram shows a permanent bar magnet placed on a wooden table. A student draws arrows to show the direction of the magnetic field at four points.

Which arrow shows the direction of the magnetic field at that position?

N S

A

C

D B

MAGNETS CLASSIFIED P2 IGCSE PHYSICS 0625 - Page 14

26 Which method is used to demagnetise a magnet?

A cool it in a freezer

B drop it into a beaker of water

C place it inside a coil carrying a direct current

D strike it with a hammer

MAGNETS CLASSIFIED P2 IGCSE PHYSICS 0625 - Page 15