Question

The conducting rod $ab$, as shown in figure makes contact with metal rails $ca$ and $db$. The apparatus is in a uniform magnetic field of $0.800T$, perpendicular to the plane of the figure. Find the magnitude of the emf induced in the rod when it is moving toward the right with a speed $7.50m/s$.(in $V$)

Answer 1

When a rod of length $l$ moving with a velocity $v$ in a perpendicular magnetic field $B$ , the induced emf $=Blv=0.8\left(50/100\right)7.5=3V$