(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

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

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.

Explore More

Browse All

Question Bank

All Subjects

Class 12 Questions

Class 12

Physics Questions

Chapter

Electromagnetic Induction

Subtopic

Faraday's and Lenz's Law

The formula for induced $e.m.f.$ in a coil due to change in magnetic flux through the coil is (here $A$ = area of the coil,$B$ = magnetic field).

Easy

View Solution

$A$ rectangular coil of $20$ turns and an area of cross-section $25 \, cm^2$ has a resistance of $100 \, \Omega$. If a magnetic field which is perpendicular to the plane of the coil changes at the rate of $1000 \, T/s$,the current in the coil is $....... \, A$.

MediumAIPMT 1992

View Solution

$A$ conducting loop is placed in a uniform magnetic field with its plane perpendicular to the field. An $emf$ is induced in the loop if:
$(a)$ It is translated (inside the field)
$(b)$ It is rotated about its axis
$(c)$ It is rotated about a diameter
$(d)$ It is deformed

Medium

View Solution

The magnetic flux through a loop of resistance $10 \Omega$ is given by $\phi = 5t^2 - 4t + 1 \text{ Wb}$. How much current is induced in the loop after $0.2 \text{ s}$ (in $\text{ A}$)?

EasyWBJEE 2010

View Solution

$A$ conducting loop is placed in a uniform magnetic field with its plane perpendicular to the field. An $emf$ is induced in the loop if

Easy

View Solution

Vedclass Products

For Students

Vedclass Test Series

Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.

Start Free Trial

For Teachers

Exam Paper Generator

Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.

Try Free

For Institutes

Online Exam Module

Live online exams with unlimited students, 360° analytics & white-label branding.

See Demo

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

Similar Questions

The formula for induced $e.m.f.$ in a coil due to change in magnetic flux through the coil is (here $A$ = area of the coil,$B$ = magnetic field).

$A$ rectangular coil of $20$ turns and an area of cross-section $25 \, cm^2$ has a resistance of $100 \, \Omega$. If a magnetic field which is perpendicular to the plane of the coil changes at the rate of $1000 \, T/s$,the current in the coil is $....... \, A$.

$A$ conducting loop is placed in a uniform magnetic field with its plane perpendicular to the field. An $emf$ is induced in the loop if:$(a)$ It is translated (inside the field)$(b)$ It is rotated about its axis$(c)$ It is rotated about a diameter$(d)$ It is deformed

The magnetic flux through a loop of resistance $10 \Omega$ is given by $\phi = 5t^2 - 4t + 1 \text{ Wb}$. How much current is induced in the loop after $0.2 \text{ s}$ (in $\text{ A}$)?

$A$ conducting loop is placed in a uniform magnetic field with its plane perpendicular to the field. An $emf$ is induced in the loop if

Vedclass Test Series

Exam Paper Generator

Online Exam Module

$A$ conducting loop is placed in a uniform magnetic field with its plane perpendicular to the field. An $emf$ is induced in the loop if:
$(a)$ It is translated (inside the field)
$(b)$ It is rotated about its axis
$(c)$ It is rotated about a diameter
$(d)$ It is deformed