The figure shows a bar magnet and a metallic coil. Consider four situations. (I) Moving the magnet away from the coil. (II) Moving the coil towards the magnet. (III) Rotating the coil about the vertical diameter. (IV)

Correct answer: C. (I) , (II) , and (III) only No EMF Induce if ring rotate about its own axis ( Δ φ=0) Hence, I , II \& IV are correct

NEET

Exam: NEET
Subject: Physics
Chapter: Electromagnetic Induction

NEET · Physics · Electromagnetic Induction

The figure shows a bar magnet and a metallic coil. Consider four...

The figure shows a bar magnet and a metallic coil. Consider four situations.

\mathrm{(I)}

Moving the magnet away from the coil.

\mathrm{(II)}

Moving the coil towards the magnet.

\mathrm{(III)}

Rotating the coil about the vertical diameter.

\mathrm{(IV)}

Rotating the coil about its axis. The figure shows a bar magnet and a metallic coil. Consider four situations. (I) Moving the magnet away from the coil.

An emf in the coil will be generated for the following situations.

Options

A $\mathrm{(I)}$ and $\mathrm{(II)}$ only
B $\mathrm{(I)}$ , $\mathrm{(II)}$ and $\mathrm{(IV)}$ only
C $\mathrm{(I)}$ , $\mathrm{(II)}$ , and $\mathrm{(III)}$ only
D $\mathrm{(I)}$ , $\mathrm{(II)}$ , $\mathrm{(III)}$ , and $\mathrm{(IV)}$

Correct answer

C. $\mathrm{(I)}$ , $\mathrm{(II)}$ , and $\mathrm{(III)}$ only

Step-by-step solution

\mathrm{EMF}

Induce if ring rotate about its own axis

(\because \Delta \phi=0)

Hence,

\mathrm{I}

\mathrm{II}

\mathrm{IV}

are correct

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