Question

A constant magnetic field of $1T$ is applied in the $x>0$ region. A metallic circular ring of radius $1m$ is moving with a constant velocity of $1m/s$ along the $x$-axis. At $t=0$, the centre of $O$ of the ring is at $x=-1m$. What will be the value of the induced emf in the ring at $t=1s$ ? (Assume the velocity of the ring does not change.)

• A. $1V$
• B. $2\pi V$
• C. $2V$
• D. $0V$

Answer 1

Answer: (C)

$emf=BLV$
$=1.(2R).1$
$=2V$