Samacheer Kalvi Class 8 Science Magnetism Questions - 1

Question: 1

A compass is used for ______

(A) Navigation

(B) Plotting magnetic lines

(C) Detection of magnetic field

(D) All of these

Question: 2

MRI stands for ______

(A) Magnetic Radar imaging

(B) Navigation

(C) Detection of magnetic field

(D) Magnetic Resonance Image

Question: 3

The shape of the Earth's magnetic field resembles that of an imaginary _____

(A) Bar magnet

(B) Straight conductor carrying current

(C) Solenoid coil

(D) U-shaped magnet

Question: 4

A magnet attracts ______

(A) Iron and steel

(B) Copper

(C) Wooden materials

(D) Any metal

Question: 5

The south pole of a bar magnet and the north pole of a U-shaped magnet will _____

(A) Attract each other

(B) Repel each other

(C) Neither attract nor repel each other

(D) None of the above

Question: 6

One of the following is an example for a permanent magnet.

(A) Neodymium

(B) Soft iron

(C) Mumetal

(D) Electromagnet

Question: 7

Attractive property of a magnet is more at the _____

(A) North pole

(B) South pole

(C) Both a and b

(D) Middle

Question: 8

Who laid the foundation for magnetism and suggested that the Earth has a giant bar magnet?

(A) William Gilbert

(B) Galileo

(C) Einstein

(D) Newton

Question: 9

_____ is the ore of iron which is the strongest natural magnet.

(A) Iron sulphide

(B) Iron oxide

(C) Ferrite

(D) Columbine

Question: 10

It is believed that he had known the property of magnet even before 200 BC.

(A) Americans

(B) Chinese

(C) Japanese

(D) Indians