10 A current is flowing in two straight parallel wires in the same direction. Force of attraction between them is 1 10^-3 N. If the current is doubled in both the wires the force will be

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Correct answer: C. (c) In case of straight parallel wires, force F= _04 2I_1I_2r If current is doubled F^ '= _04 2 2I_1 2I_2r=4F ∴ F^ '=4 1 10^-3=4 10^-3 N

$10 A current is flowing in two straight parallel wires in the same direction. Force of attraction between them is 1 \times 10^{- 3} N . If the current is doubled in both the wires the force will be$

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