Question

A car moves on a plane road . Induced emf produced across the axle is maximum when it moves at A. Poles

B. Equator

C. Remain stationary

D. No emf induced at all

Answer 1

(A) Poles

Explanation:

When magnetic flux changes through a coil or conductor an emf is induced in that coil. It can be calculated by using following formula:

ε = VBL sinθ

Where,

V = velocity  

B = magnetic field

L = length

θ = Angle between length and magnetic field

So, when it moves at poles then θ = 90 degrees.

εmax = VBL