Q 12-06-001JEE MainEasy
A $0.5\ \text{m}$ rod moves at $4\ \text{m/s}$ perpendicular to its length and to a uniform magnetic field of $0.2\ \text{T}$. Find the emf induced across its ends, in volts.
Numerical value type. Enter your answer.
Answer: 0.4
Concept. Motional emf: $\varepsilon = B\ell v$ when the rod, its velocity and the field are mutually perpendicular.
Step 1. Substitute.
$$\varepsilon = 0.2 \times 0.5 \times 4 = 0.4\ \text{V}$$
Answer. $0.4$.
Solution by Sreeraj P, M.Sc Physics