define lenzs law?

Lenz’s law

• According to Lenz’s law:-The polarity of the induced emf is such that it tends to produce induced current in such a direction that it opposes the change in magnetic flux that produced it.
• The (-) ive sign in given equatione= (-) (dΦ/dt)tells about the direction.
• According to Faraday’s law whenever there is change in the magnetic flux, emf is induced, as aresult there will be induced current.
• According to Lenz’s law the direction of the induced current will be such that it opposes the change in the magnetic flux.

For example:-

• Consider a circuit where the magnetic flux is increasing, as a result flux will change and which induces the emf in the circuit, and as a result current will be induced in the circuit.
• The direction of the induced current will be such that it will oppose the cause which induced it.
• The induced current will be in such a direction that it decreases the magnetic flux.