Question

The magnitude of the earths magnetic field at a place is $B_0$ and the angle of dip is $\delta$. A horizontal conductor of length $l$ lying along the magnetic north-south moves eastwards with a velocity $v$. The emf induced across the conductor is:

• A. $zero$
• B. $B_{0}vl\sin \delta$
• C. $B_{0}lv$
• D. $B_{0}l\cos \delta$

Answer 1

The correct option is B

$B_{0}vl\sin \delta$

A horizontal conductor of length l lying along the magnetic north-south when moves eastwards with a velocity v then the emf will induced and magnetic field ineast direction will act.

$E=B_{vertical}vl$

$here,B=B_0$

$E=B_{0}vl\sin \delta$