Magnetism_03A

Small particles of metal are scattered near a bar magnet to show the pattern of the magnetic

field. Which metal is suitable?

• aluminium

• brass

• copper

• iron

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 only

• rod 1 and rod 3 only

• rod 3 only

A student uses three small plotting compasses to investigate the magnetic field around a bar magnet. Which diagram shows the directions in which the compass needles point?

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Two rods X and Y look the same. The N pole of a magnet is brought close, in turn, to each end of both rods. The results of these four actions are shown in the table. Which of the rods is a permanent magnet?

• neither of the rods

• both of the rods

• rod X only

• rod Y only

Which materials are suitable for making a permanent magnet and the core of an electromagnet?

• A

• B

• C

• D

Which line in the table shows whether iron and steel are ferrous or non-ferrous materials?

• A

• B

• C

• D

Two metal bars are held together. At least one of the bars is a magnet. The bars repel each other. What does this show about the bars and why?

• A

• B

• C

• D

The north pole of a bar magnet is placed next to end P of an iron bar PQ, as shown. As a result,

magnetic poles are induced in the iron bar. What are the magnetic poles induced at P and at Q?

• A

• B

• C

• D

A permanent magnet is brought near to a piece of copper. The copper is not attracted by the magnet. Why is there no attraction?

• Copper is ferrous but is only attracted by an electromagnet.

• Copper is ferrous but is not attracted by any type of magnet.

• Copper is not ferrous and is only attracted by an electromagnet

• Copper is not ferrous and is not attracted by any type of magnet.

A magnet attracts two pieces of iron. What is the arrangement of the induced poles in the pieces of iron?

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