(A) When the current $i$ in coil $A$ increases,the magnetic flux linked with coil $B$ increases.According to Lenz's law,the induced current in coil $B

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There will be repulsion between $A$ and $B$ if $i$ is increased.

(A) When the current $i$ in coil $A$ increases,the magnetic flux linked with coil $B$ increases.According to Lenz's law,the induced current in coil $B$ will flow in such a direction that it opposes the cause of its production,which is the increase in magnetic flux.To oppose the increase in flux,coil $B$ will develop a magnetic polarity that repels coil $A$.Therefore,there will be a force of repulsion between coil $A$ and coil $B$ when the current $i$ is increased.

Class 12 Physics Electromagnetic Induction Faraday's and Lenz's Law

Medium

Two circular coils $A$ and $B$ are facing each other as shown in the figure. The current $i$ through coil $A$ can be altered.

A
There will be repulsion between $A$ and $B$ if $i$ is increased.
B
There will be attraction between $A$ and $B$ if $i$ is increased.
C
There will be neither attraction nor repulsion when $i$ is changed.
D
Attraction or repulsion between $A$ and $B$ depends on the direction of current. It does not depend on whether the current is increased or decreased.

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Electromagnetic Induction

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Faraday's and Lenz's Law

Consider a magnet surrounded by a wire loop with an on/off switch $S$ as shown in the figure. If the switch is thrown from the off position (open circuit) to the on position (closed circuit), will a current flow in the circuit? Explain.

Easy

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$A$ metallic ring is dropped down, keeping its plane perpendicular to a constant and horizontal magnetic field. The ring enters the region of magnetic field at $t = 0$ and completely emerges out at $t = T \, \text{sec}$. The current in the ring varies as

MediumAIIMS 2006

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The magnetic flux through a coil perpendicular to its plane is varying according to the relation $\phi = (5t^3 + 4t^2 + 2t - 5) \; Wb$. If the resistance of the coil is $5 \; \Omega$,then the induced current through the coil at $t = 2 \; s$ will be $.... \; A$. (in $.6$)

MediumJEE MAIN 2022

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Discuss Faraday's experiment of two coils for the generation of electric current in a coil.

Medium

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$A$ rectangular coil of $100$ turns and size $0.1 \,m \times 0.05 \,m$ is placed perpendicular to a magnetic field of $0.1 \,T$. If the field drops to $0.05 \,T$ in $0.05 \,s$, the magnitude of the e.m.f. induced in the coil is (in $\,V$)

MediumKCET 2013

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Two circular coils $A$ and $B$ are facing each other as shown in the figure. The current $i$ through coil $A$ can be altered.

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Consider a magnet surrounded by a wire loop with an on/off switch $S$ as shown in the figure. If the switch is thrown from the off position (open circuit) to the on position (closed circuit), will a current flow in the circuit? Explain.

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$A$ rectangular coil of $100$ turns and size $0.1 \,m \times 0.05 \,m$ is placed perpendicular to a magnetic field of $0.1 \,T$. If the field drops to $0.05 \,T$ in $0.05 \,s$, the magnitude of the e.m.f. induced in the coil is (in $\,V$)

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