JEE Main 2011 Physics question
A boat is moving due east in a region where the earth's magnetic field is due north and horizontal. The boat carries a vertical aerial 2 m long. If the speed of the boat is , the magnitude of the induced emf in the wire of aerial is :
Answer: (3)
Solution
(east) × (north) is vertical, along the aerial, so $e = Bvl
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