Question

A bar magnet is thrown along the axis of a ring with speed $v_0$. After sometime, speed of magnet is $v$, then

• A. $v>v_0$
• B. $v<v_0$
• C. $v=v_0$
• D. Information is incomplete

Answer 1

The correct option is B $v<v_0$

According to Lenz’s law, induced current in loop is such that it opposes the of change in flux; hence, the current is induced such that the magnetic field produced by the induced current repels the approaching magnet.