Two long parallel wires kept 2 m apart carry 3A current ...

CBSE Class 12 Physics 2023 All Sets Paper

Question : 2 of 18

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

Solution:

Given

i_1=3A

i_2 = 3A

r=2m

\;{F}/{l}=\;{µ_0}/{2π}\;{i_1i_2}/{r}

=2\;{µ_0}/{4π}× {3× 3}/{2}

⇒ \;{2× 10^{-7}× 9}/{2}

9× 10^{-7} N\/m

Repulsive

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