An arrangement of three parallel straight wires placed perpendicular to plane of paper carrying same current i along the same direction is shown in fig. Magnitude of force per unit length on the middle wire 'B' is given by

Question:

An arrangement of three parallel straight wires placed perpendicular to plane of paper carrying same current i along the same direction is shown in fig. Magnitude of force per unit length on the middle wire ‘B’ is given by

Options :

(a) u0I^2/2 лd
(b) 2u0I^2
(c) √2u0I^2/ лd
(d) u0I^2/ лd

Answer :

(d) u0I^2/ лd

Answer Steps :

step 1:

step 2:

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