Question

A conducting rod of length $l$ falls vertically under gravity in a region of uniform magnetic field $B$. The field vectors are inclined at an angle $\theta$ with the horizontal as shown in figure. If the instantaneous velocity of the rod is $v$, the induced emf in the rod $ab$ is

• A. $Blv$
• B. $Blv\cos \theta$
• C. $Blv\sin \theta$
• D. $\text{Zero}$

Answer 1

The correct option is D $\text{Zero}$

$v$ is parallel to $l$.
$\therefore$ Induced emf will be zero.