Question

Which of the following is incorrect?
1) To increase the magnetic strength, increase the number of strokes while
creating magnets.
2) To increase the magnetic strength, increase the number of coils around
the nail.
3) Magnetic force is a pulling force only.
4) The Magnet may lose its magnetic property when heated to a very high
temperature​

Answer 1

Answer:

(3) Magnetic force is a pulling force only

Explanation:

Magnets push other magnets if the signs are same {i.e., + , + or - ,- }

Answer 2

2. to increase the magnetic stength ,increases the no. of coils around the nail.

this is the correct answer.

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