Question

Lenz's law is in accordance with the law of conservation of energy. How? ​

Answer 1

$\bold {\huge {Answer :-}}$

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✭Electromagnetic Induction✭

✭Lenz Law✭

➛ In Faraday’s experiment when N- pole of magnet is moved towards the coil, the face of the coil towards the approaching magnet acquires N – polarity.

➛Work has to be done against force of repulsion in bringing the magnet closer to the coil.

➛Similarly, when N- pole of magnet is moved away the coil, the face of the coil towards the receding magnet acquires South polarity.

➛Work has to be done against force of attraction in taking the magnet away from the coil.

➛It is this mechanical work done on the magnet against the force of repulsion or attraction in moving the magnet w.r.t. the coil that changes into electrical energy producing induced e.m.f. and induced current. When the magnet is stationary, no work done and so no induced current.

➛Hence Lenz’s Law obeys the principle of conservation of energy

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LENZ LAW

⇨According to Lenz's law, the polarity of the induced emf is such that it opposes the change in magnetic flux responsible for its generation

Answer 2

${\bold {\boxed{\underline {\huge {\pink {Answer :}}}}}}$

$according \: to \: lenz \: law$

the direction of induced current is such that it oppose the cause which produces it.

it means induced current opposes the change in magnetic flux.

Lenz's law obey law of conversation of energy it is used to find the direction of induced current.

According to Faraday's law of EMF:

• 1st law:-when the magnetic flux linked with a circuit or a coil changes with time then an induced EMF produced in the coil and if the circuit of the coil is complete then an induced current also begins to flow in the coil. EMF induces till the flux changes.
• 2nd law:- according to this law, the induced EMF is directly proportional to the rate of change of magnetic flux.