Q155 / 180 · KCET 2017 · Physics

A bar magnet is allowed to fall verticallythrough a copper coil placed in a horizontalplane. The
magnet falls with a net acceleration

A
\(=g \)
B
\(>\mathrm{g} \)
Correct answer
C
\( < g \)
D
Zero

Solution

According to Lenz's law, as the magnet falls it induces an emf in the coil which opposes the motion of the bar magnet.
Therefore, the net acceleration is less than \( \mathrm{g} \).

Hence, the correct answer is option: 'C'.

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A bar magnet is allowed to fall verticallythrough a copper coil placed in a horizontalplane. Themagnet falls with a net acceleration

Solution

More Waves and Sound Questions

A bar magnet is allowed to fall verticallythrough a copper coil placed in a horizontalplane. The
magnet falls with a net acceleration