Force between two identical bar magnets whose centres are \( r \) metre apart is \( 4.8 \mathrm{...
Автор: PW Solutions
Загружено: 2022-11-13
Просмотров: 278
Описание:
Force between two identical bar magnets whose centres are \( r \) metre apart is \( 4.8 \mathrm{~N} \), when their axes are in the same line. If separation is increased to \( 2 r \), the force between them is reduced to
(A) \( 2.4 \mathrm{~N} \)
(B) \( 0.6 \mathrm{~N} \)
(C) \( 1.2 \mathrm{~N} \)
(D) \( 0.3 \mathrm{~N} \)
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