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Question:

A horizontal conducting rod 10m long extending from east to west is falling with a speed 5.0ms⁻¹ at right angles to the horizontal component of the Earth's magnetic field, 0.3×10⁻⁴ Wbm⁻². Find the instantaneous value of the emf induced in the rod.

Solution:

Horizontal conducting rod has velocity V downwards where V=5m/s. Length L=10m Earth magnetic field B=0.3×10⁻⁴ Wbm⁻² Instantaneous value of emf induced E=Blv = 15×10⁻⁴ volt