(A) The Assertion describes Lenz's Law,which states that the direction of induced current is such that it opposes the change in magnetic flux that pro

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If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.

(A) The Assertion describes Lenz's Law,which states that the direction of induced current is such that it opposes the change in magnetic flux that produced it.Lenz's Law is a direct consequence of the Law of Conservation of Energy. If the induced current were to aid the change in magnetic flux,it would lead to an infinite increase in energy,which violates the principle of conservation of energy.Therefore,the Reason correctly explains the Assertion.

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

Easy

Assertion : An induced current has a direction such that the magnetic field due to the current opposes the change in the magnetic flux that induces the current.
Reason : The above statement is in accordance with the conservation of energy.

AIIMS 2011 All AIIMS

A
If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
B
If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
C
If the Assertion is correct but Reason is incorrect.
D
If both the Assertion and Reason are incorrect.

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Class 12

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Chapter

Electromagnetic Induction

Subtopic

Faraday's and Lenz's Law

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AIIMS 2011 Paper All AIIMS years →

$A$ coil has $200$ turns and an area of $70 \ cm^2$. The magnetic field perpendicular to the plane of the coil is $0.3 \ Wb/m^2$ and it takes $0.1 \ s$ to rotate through $180^o$. The value of the induced $e.m.f.$ will be ...... $V$.

MediumAIIMS 1997

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Magnetic flux (in $Wb$) linked with a closed loop varies with time $t$ (in $s$) as $\phi = 2t^2 + 1$. The magnitude of induced emf at $t = 1 \ s$ is $..... \ V$.

Easy

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$A$ moving conductor coil in a magnetic field produces an induced $e.m.f$. This is in accordance with

Easy

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In the following figure,the magnet is moved towards the coil with a speed $v$ and the induced $emf$ is $e$. If the magnet and the coil recede away from one another,each moving with speed $v$,the induced $emf$ in the coil will be: (Assume the separation in both cases is the same)

Medium

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The magnetic flux through a coil of resistance $R$ changes by an amount $\Delta \phi$ in time $\Delta t$. The total quantity of induced electric charge $Q$ is

EasyMHT CET 2022

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Assertion : An induced current has a direction such that the magnetic field due to the current opposes the change in the magnetic flux that induces the current.Reason : The above statement is in accordance with the conservation of energy.

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$A$ coil has $200$ turns and an area of $70 \ cm^2$. The magnetic field perpendicular to the plane of the coil is $0.3 \ Wb/m^2$ and it takes $0.1 \ s$ to rotate through $180^o$. The value of the induced $e.m.f.$ will be ...... $V$.

Magnetic flux (in $Wb$) linked with a closed loop varies with time $t$ (in $s$) as $\phi = 2t^2 + 1$. The magnitude of induced emf at $t = 1 \ s$ is $..... \ V$.

$A$ moving conductor coil in a magnetic field produces an induced $e.m.f$. This is in accordance with

In the following figure,the magnet is moved towards the coil with a speed $v$ and the induced $emf$ is $e$. If the magnet and the coil recede away from one another,each moving with speed $v$,the induced $emf$ in the coil will be: (Assume the separation in both cases is the same)

The magnetic flux through a coil of resistance $R$ changes by an amount $\Delta \phi$ in time $\Delta t$. The total quantity of induced electric charge $Q$ is

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Assertion : An induced current has a direction such that the magnetic field due to the current opposes the change in the magnetic flux that induces the current.
Reason : The above statement is in accordance with the conservation of energy.