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A metal conductor of length 1 m rotates vertically about one of its ends at angular velocity 5 radian per second. If the horizontal component of earth's magnetic field is 0.2 × 10⁻⁴ T, then the e.m.f. developed between the two ends of the conductor is

Asked in JEE Main 2004 · Rotating rods, discs and wheels

Answer: (2) 50 μV

Step-by-step solution

ε=1/2B_Hω L²=1/2×0.2×10⁻⁴×5×1=50 μV.

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