Question

Q.1. Select and write the correct answer:
i.
A large magnet is broken into two pieces so that their lengths are in the ratio 2 : 1. The pole
strengths of the two pieces will have the ratio
(A) 2:1
(B) 1:2
(C) 4:1
(D) 1:1​

Answer 1

Answer:

Magnetic moment of a magnet=ml

where m=pole strength

l=effective distance between the two poles

When the magnet is cut, the pole strength(m) remains the same.

Therefore the ratio of Magnetic Moments is the same as the ratio of their lengths.

Therefore required ratio is 2:1

Explanation:

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