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Q.

When two infinitely long parallel wires separated by a distance of 1m, each carry a current of 3 amperes, the force in newton / meter length experienced by each will be, given μ0=4π×10−7 SI units.

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a

6×10−7

b

18×10−7

c

2×10−7

d

3×10−7

answer is D.

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Detailed Solution

Fl=μ0i1i22πr⇒Fl=2×10−7×3×31=18×10−7N/m

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