Q.
A rectangular loop is being pulled at a constant speed $v$, through a region of certain thickness $d$, in which a uniform magnetic field $B$ is set up. The graph between position $x$ of the right hand edge of the loop and the induced emf $E$ will be
A)
B)
C)
D)
Explanation
(b) As $x$ increases so $\frac{dB}{dt}$ increases, $i.e$., induced emf $(e)$ is negative. When loop completely enters in the magnetic field, emf = 0
When it exists, $x$ increases but $\frac{dB}{dt}$ decreases, $i.e.,e$ is positive
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.