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A conductor of length 0.4 m is moving with a speed of 7 m/s perpendicular to a magnetic field of intensity 0.9 Wb/m2. The induced e.m.f. across the conductor is
(a) 1.26 V
(b) 2.52 V
(c) 5.04 V
(d) 252 V
(b)
Length of conductor () = 0.4 m;
Speed (v) = 7 m/s and magnetic field (B) = 0.9 Wb/m2.
Induced e.m.f. (V) = B/v sin B = 0.9 × 004 × 7 × sin 90° = 2.52 V.
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