JEE Main 2024 Physics question
A horizontal straight wire 5 m long extending from east to west falling freely at right angle to horizontal component of earth's magnetic field 0.60 × 10⁻⁴ Wbm⁻². The instantaneous value of emf induced in the wire when its velocity is 10 ms⁻¹ is × 10⁻³ V.
Answer: 3
Solution
e = Bℓv = 0.60 × 10⁻⁴ × 5 × 10 = 3 × 10⁻³ V.