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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.

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