Magnetism gr 10

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.

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

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

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

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.

In which pair are both materials magnetic?

• aluminium and copper

• copper and iron

• iron and steel

• steel and aluminium

The diagram shows the magnetic field around two bar magnets.

Which diagram shows the poles of the magnets?

• 
• 
• 
• 

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.

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

Which group contains only non-ferrous metals?

• aluminium, brass, iron

• brass, copper, lead

• copper, iron, steel

• copper, lead, steel