Magnets

The diagram shows an object 'X' being attracted to magnet A.

Which one of the following materials could object 'X' be made of?

• Steel

• Gold

• Copper

• Aluminium

Richard dropped his keychain into a drain. To get it out, he made use of a magnet. Why was this possible?

• His magnet is very strong.

• His magnet has north and south poles.

• His keychain was made of a magnetic material.

• His keychain was made of a non-magnetic material.

Four similar-sized magnets, A, B, C and D are hung from strings of different lengths as shown in the picture. A plastic tray of iron pins was placed below the magnets and a different number of pins are observed to be attracted to the magnets.

Which magnet is most likely the strongest?

• A

• B

• C

• D

Shanti placed some objects on a tray as shown in the picture.

She brought a bar magnet to each object on the tray one at a time.

Which one of the following items was attracted to the bar magnet?

• the screw

• the eraser

• the feather

• the matchstick

The diagrams show magnets of two different shapes, X and Y.

Based on the diagrams shown, which of the following parts of the magnets can attract more pins?

• 1 and 3 only

• 1 and 4 only

• 2 and 3 only

• 2 and 4 only

The diagram shows what happens when three ring magnets are placed around a wooden stick.

Which poles could P and Q be?

1.P: North; S: North

2.P: North; S: South

3.P: South; S: North

4.P: South; S: South

• 1

• 2

• 3

• 4

When making a magnet using the 'stroke' method, the strength of the magnet can be increased by ________________.

• stroking it repeatedly in all directions

• stroking it more times in the same direction

• heating it with a flame in the same direction

• dropping it several times from different heights

Which of the following does not make use of magnets?

• 
• 
• 
• 

Linda conducted an experiment to form electromagnets as shown in the picture.

In which set-up would the electromagnet be the strongest?

• E

• F

• G

• H

Which of the following is not a use of magnets?

• Opening a key lock

• Closing a refrigerator door

• Storing information in ATM cards

• Showing directions in compasses