Magnets

Front

Which one of the following statements is true of magnets?

• All metals are attracted to magnets.
• Like poles of magnets can repel each other.
• Two magnets will always attract each other.
• Larger magnets have greater magnetic pull than smaller magnets.

Back

Like poles of magnets can repel each other.

Front

Which magnet has the weakest magnetic pull based on the experiment with magnets A, B, C, and D attracting iron nails?

Back

C

Front

Why did the toy car move away from the iron nail when electricity flowed through the wire?

Back

When electricity flowed through the wire, it made the iron nail a magnet and repelled H, which is also a magnet.

Front

The diagram shows a horseshoe magnet. If the magnet is placed in a box of paper clips, which part of the magnet A, B, C or D will attract the most number of paper clips?

Back

A

Front

Study the classification chart. Based on the information given, classify X, Y, and Z. Options: X - copper, Y - aluminium, Z - iron; X - paper, Y - copper, Z - aluminium; X - rubber, Y - gold, Z - steel; X - cotton, Y - steel, Z - copper.

Back

X - rubber, Y - gold, Z - steel

Front

Ann carried out an experiment on three objects with a magnet. She wanted to find out how the objects would respond when both the poles of the magnet are placed near them. The diagram shows her results. What could objects A, B and C be? Options: A - magnet, B - ice cream stick, C - iron pin, A - iron pin, B - magnet, C - handkerchief, A - iron pin, B - ice cream stick, C - magnet, A - ice cream stick, B - iron pin, C - magnet

Back

A - iron pin, B - ice cream stick, C - magnet

Front

Roger placed two cubes, A and B, on a bar magnet. He lifted the magnet, and cube B dropped off. Possible conclusions? A: Cube A is magnetic. B: Cube B repels the magnet. C: Cube B is non-magnetic.

Back

A and C only

Front

Gina observed a paper clip attracted to a magnet from 5 cm away. What conclusion can be made?

Back

Magnetic force can act at a distance.

Front

How does a door stopper keep a door open?

Back

The magnet attracts part A.

Front

Materials used for magnet and door in the diagram: Magnet - iron, Door - copper; Magnet - steel, Door - iron; Magnet - clay, Door - steel; Magnet - aluminium, Door - wood.

Back

Magnet - steel, Door - iron