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Two long parallel wires kept \(2 \mathrm{~m}\) apart carry \(3 \mathrm{~A}\) current each, in the same direction. The fo…

Q1

Two long parallel wires kept \(2 \mathrm{~m}\) apart carry \(3 \mathrm{~A}\) current each, in the same direction. The force per unit length on one wire due to the other is

a

\(4.5 \times 10^{-5} \mathrm{Nm}^{-1}\), attractive

b

\(4.5 \times 10^{-7} \mathrm{~N} / \mathrm{m}\), repulsive

c

\(9 \times 10^{-7} \mathrm{~N} / \mathrm{m}\), attractive

d

\(9 \times 10^{-5} \mathrm{~N} / \mathrm{m}\), attractive

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