A metre gauge train is running due north with a constant speed of `90 km h^(-1)` on a horizontal track. If the vertical component of earth's magnetic field is `3 xx 10^(-5) Wb m^(-2)`, calculate the e.m.f. induced across the axle of the train of length 1.25 m

Explanation

To calculate the induced electromotive force (e.m.f.) across the axle of the train, we can use Faraday's law of electromagnetic induction. The formula for the induced e.m.f. (ε) is given by:

\[ \varepsilon = B \cdot l \cdot v \]

where:
- \( B \) is the magnetic field strength (in Wb/m²),
...