Magnetism

A bar magnet is broken into three parts X, Y and Z as shown in figure below.

Which diagram shows the poles in X, Y and Z? (SPE/2012/Q28)

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Siti Aniza found two bar magnets with no labels on them. She did three experiments as shown by figure below. The arrows show the movement of magnets. Which experiment(s) show(s) two unlike poles next to each other?

(SPE/2009/Q27)

• Experiment 1.

• Experiment 2.

• Experiment 3.

• Experiment 1 and 2.

Sharifah placed two bar magnets four times next to each other. The movements of the magnets are shown in figure below.

What could be concluded by Sharifah from her observations?

(SPE/2010/Q32)

• Like poles attract each other; unlike poles repel each other.

• Like poles repel each other; unlike poles attract each other.

• Unlike and like poles repel each other.

• Unlike and like poles have no effect on each other.

Aminuddin placed three toy cars, X, Y and Z at positions 1, 2 and 3. He put a bar

      magnet inside each car toy as shown in figure below.

What would happen if Aminuddin pushed all toy cars together as shown in figure

      below?

      (SPE/2014/Q20)

• Toy car X would attract Toy car Y

  ; Toy car Y would attract Toy car Z

• Toy car X would attract Toy car Y

  ; Toy car Y would repel Toy car Z

• Toy car X would repel Toy car Y

  ; Toy car Y would attract Toy car Z

• Toy car X would repel Toy car Y

  ; Toy car Y would repel Toy car Z

Which of the following pairs consists of magnetic materials?

(SPE/2014/Q19)

• Aluminium can and steel paper clip.

• Gold ring and silver bracelet.

• Iron paper clip and copper coin.

• Iron paper clip and steel coin.

Which of the following proves that a piece of metal is already a magnet?

(SPE/2015/Q22)

• A magnet is attracted to it.

• Both ends of a compass needle are attracted to it.

• Copper wire is repelled by it.

• One end of a compass needle is repelled by it.

11. Harun has three unidentified rods X, Y and Z. The rods can be either magnet, copper or iron. To confirm their identity, he placed a bar magnet near one end of the rods X, Y and Z shown in figure below.

Which of the following is the correct conclusion made by Harun?

(SPE/2015/Q23)

• X-Copper

  Y-Iron

  Z-Magnet

• X-Iron

  Y-Copper

  Z-Magnet

• X-Iron

  Y-Magnet

  Z-Copper

• X-Magnet

  Y-Iron

  Z-Copper

If the North Pole of a magnet is brought very near to the end of an iron bar, the end of the iron bar and the bar magnet will __________. (SPE/2012/Q27)

• attract each other.

• have no effect on each other.

• produce an electric spark.

• repel each other.