Magnetism

Four plotting compasses are placed in the magnetic field of two identical bar magnets as shown in the diagram. Which compass is pointing in the wrong direction?

• A

• B

• C

• D

A magnet will be attracted to the objects which are made of ____________.

• steel and iron

• steel and copper

• aluminum and gold

• copper and brass

Which of the following is not a characteristic of magnetic field lines?

• Magnetic field lines begin from North Pole to South Pole.

• Magnetic field lines do not intersect.

• The strength of magnetic field lines is indicated by the spacing of lines.

• Magnetic field lines always form open loops.

Two iron nails hang from a bar magnet. Which diagram shows the magnetic poles induced in the nails?

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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.

• A

• B

• C

• D

Which of the following is true about a bar magnet that is divided into two pieces?

• Two new bar magnets were made.

• The magnetlost its magnetism.

• Magnetic poles were separated.

• The magnet increased its magnetism.

Ferromagnetic materials that retain the magnetism induced in them become permanent magnets.

• True

• False

How will you describe magnetism?

• A kind of force

• A kind of electricity

• A kind of energy

• A kind of element

Which of the following object is/are magnetic?

• coin

• nickel

• rubber

• leather

What is the arrangement of the induced poles in the pieces of iron?

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