Select the correct option
1. The magnetic strength of a magnet
    a. is uniform throughout the body of the magnet
    b. is concentrated at one point called the pole of the magnet
    c. is concentrated in two regions called the poles of the magnet
    d. is concentrated in the centre of the magnet

2. Which of the following is not a magnetic material?
    a. Gold    b. Nickel    c. Iron    d. Cobalt

3. Materials attracted by a magnet are called
    a. diamagnetic    b. leading stone    c. magnetic materials    d. non-magnetic materials

4. A compass is used for
    a. alignment along north-south direction     b. to find direction in the sea
    c. to attract magnetic materials     d. none of these

1. The magnetic strength of a magnet

Ans :- Option (c) is concentrated in two regions called the poles of the magnet

Explanation

The magnetic strength of a magnet is concentrated in two regions called the poles of the magnet. Poles are the regions of concentrated lines of force and have equal magnetic strength.

2. Which of the following is not a magnetic material?

Ans :- Option (a) Gold   

Explanation

Gold is not a magnetic material. It is a diamagnetic metal like most other metals and shows only a weak repulsion towards magnets like all diamagnetic metals.

3. Materials attracted by a magnet are called

Ans :- Option (a) magnetic materials 

Explanation

Materials that are strongly attracted to a magnet, are called ferromagnetic or magnetic material. These include elements like iron, nickel, cobalt and their alloys, some alloys of rare-earth metals, and some naturally occurring minerals such as lodestone.

4. A compass is used for

Ans :- Option (d) none of these

Explanation

Compass is a magnetometer mainly used in navigation to find direction on the earth. The needle of the compass aligns with the Earth's magnetic field direction and points the north-south direction.

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Updated on: 10-Oct-2022

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