Force between two identical bar magnets whose centres are \( r \) metre apart is \( 4.8 \mathrm{....

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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 \( 2 r \),
\( \mathrm{P} \)
the force between them is reduced to
(1) \( 2.4 \mathrm{~N} \)
(2) \( 1.2 \mathrm{~N} \)
(3) \( 0.6 \mathrm{~N} \)
(4) \( 0.3 \mathrm{~N} \)


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