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Question -

(a) Obtain an expression for the mutual inductance between a longstraight wire and a square loop of side a as shown in Figure
(b) Now assume that the straight wire carries a current of 50 A and theloop is moved to the right with a constant velocity, υ = 10 m/s. Calculate theinduced e.m.f. in the loop at the instant when x = 0.2 m. Take a = 0.1 m andassume that the loop has a large resistance.



Answer -

(a) Consider a small portion of the coil of thickness dt at a distancet from the current carrying wire.Then the magnetic field strength experiencedby this portion

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