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Lenz's law violates the principle of con...

Lenz's law violates the principle of conservation of energy.
Reason: Induced e.m.f. opposes always the change in magnetic flux responsible for its production.

A

If both asseration and reason are true and reason is the correct explanation of assertion.

B

If both asseration and reason are true but reason is not the correct explanation of assertion.

C

If assertion is true but reason is false.

D

If assertion is false but reason is true.

Text Solution

Verified by Experts

The correct Answer is:
D
Lenz's Law is based on conservation of energy and induced emf always opposes the cause of it i.e., change in magnetic flux.
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Does Len'z law violet the principle of energy conservation ?

Lenz's law gives us the direction of current induced in a circuit. According to this law, the polarity of induced e.m.f is always such that is opposes the change in magnetic flux responsible for its production. It means if e.m.f. is induced due to increase in magnetic flux, the direction of e.m.f. induced is such as to oppose the increase in magnetic flux. The reverse is also true. Read the above passage and answer the following questions : (i) Does Lenz's law violate the principle of conservation of energy ? (ii) Name any other rule for finding the direction of induced current. (iii) What does Lenz's law imply in day to day life?

Knowledge Check

  • Assertion (A): Lenz's law does not violets the principle of conservation of energy. Reason (R): Induce e.m.f. never opposes the change in magnetic flux that causes the e.m.f.

    A
    Both A and R are true and R is the correct explanation of A
    B
    Both A and R are true but R is NOT the correct explanation of A
    C
    A is true but R is false
    D
    A is false and R is true

  • To induce an e.m.f. in a coil, the linking magnetic flux

    A
    Must decrease
    B
    Can either increase or decrease
    C
    Must remain constant
    D
    Must increase

  • STATEMENT-1: Lenz's law is based on the principle of conservation of energy. Because STATEMENT-2: The magnitude of the induced emf is directly proportional to the rate of change of the magnetic flux.

    A
    Statement-1 is True , Statement-2 is True , Statement-2 is a correct explanation for Statement-1.
    B
    Statement-1 is True , Statement-2 is True , Statement-2 is NOT a correct explanation for Statement-1.
    C
    Statement-1 is True , Statement-2 is False
    D
    Statement-1 is False , Statement-2 is True

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    Does chanbe in magnetic flux induce e.m.f. or current ?

    Does the change in magnetic flux always produce both emf and current?

    As per Lenz's law the induced emf tends to produce a current which opposes the change in magnetic flux that produced it.

    Faraday's Law | Lenz Law | Induced emf by changing area and magnetic field

    Assertion: Lenz's law is about violation of energy conservation in electromagnetic induction . Reason: When magnetic flux linked with a coil changes then emf is induced in such a manner that it opposes the cause that has induced it.

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