Question

A metallic conductor of length 1 m rotates in a vertical plane parallel to east-west direction about one of its end with angular velocity 5 rad s^–1. If the horizontal component of earth’s magnetic field is 0.2 × 10^–4 T, then emf induced between the two ends of the conductor is:

• A. 5 μV
• B. 50 μV
• C. 5 mV
• D. 50 mV

Answer 1

The Correct Option is B

Emf = \((\frac{1}{2})\)Bωl²
= \((\frac{1}{2})\)× 0.2 × 10^–4 × 5 × 1² V
= 0.5 × 10^–4 V
= 50 μV

\(\therefore, \) The correct answer is (B): 50 μV