Question

A metallic rod of length $20$ cm is placed in North-South direction and is moved at a constant speed of 20 m/s towards East. The horizontal component of the Earth’s magnetic field at that place is $4 × 10^{–3}$ T and the angle of dip is $45º$. The emf induced in the rod is __________mV.

Answer 1

The emf induced in the rod is $\underline{16}$ mV.

$E = Blv$

=$4×10^{−3}×\frac{20}{100}×20$ $Volts$

= $16\; mV$