Question

Consider a conducting rod of length 34 cm moving along a pair of rails, and a magnetic field pointing perpendicular to the plane of the rails.

Required:
At what speed (in m/s) must the sliding rod move to produce an emf of 0.75V in a 1.75T field?

Answer 1

Answer:

The speed is  $v= 1.26 \ m/s$

Explanation:

From the question we are told that

   The  length of the rod is  $l = 34 \ cm = 0.34 \ m$

    The  induced emf is $\epsilon = 0.75\ V$

    The  magnetic field is $B = 1.75 \ T$

Generally the speed is mathematically represented as

       $v = \frac{\epsilon }{Bl }$

=>    $v = \frac{ 0.75 }{1.75 * 0.34 }$

=>   $v= 1.26 \ m/s$