Magnetism – Maharashtra Board Class 8 Solutions for General Science

Magnetism – Maharashtra Board Class 8 Solutions for General Science (English Medium)

MathematicsGeneral ScienceMaharashtra Board Solutions

Solution 1.a

Magnetic substances: Iron, cobalt, nickel
Non-magnetic substances: Copper, phosphorus, soil, water, silver, mercury, wood, oil

Solution 1.b

In olden times, a magnetic needle was supported on a wooden block and floated on water. The needle was free to rotate, and hence, the needle used to come to rest in the North-South direction. It was later placed in the compass to tell directions because of its property of coming to rest in the North-South direction.

Solution 2

‘A’	‘B’
a. Compass	4. Magnetic needle
b. Cupboard	3. Bar magnet
c. Repulsion	2. Like poles
d. Magnetic poles	1. Maximum magnetic strength

Solution 3

1. There is magnetic repulsion between like poles.
2. Stainless steel is a non-magnetic substance.
3. There is mutual attraction between unlike poles of magnets.
4. There is maximum magnetic force near the poles of a magnet.

Solution 4.a

A magnetic needle is used in a mariner’s compass due to its property of always coming to rest in the North-South direction.

Solution 4.b

When a bar magnet is suspended vertically, it spins around its vertical axis and does not freely rotate around its horizontal plane, so it does not hang in the North-South direction.