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:

v = 1.26 m/s

Explanation:

Given that,

Length of the conducting rods = 34 cm = 0.34 m

Magnetic field, B = 1.75 T

Induced emf is 0.75 V

we need to find the speed with which it slides. Due to the motion of the rod an emf is induced in it which is given by :

$\epsilon=Blv$

v is the speed of rod

$v=\dfrac{\epsilon}{Bl}\\\\v=\dfrac{0.75}{1.75\times 0.34}\\\\v=1.26\ m/s$

So, the speed of the sliding rod is 1.26 m/s.