explain Lenz's law with the help of conservation of energy
Answers
Explanation:
Lenz's law is based upon the law of conservation of energy. Lenz law states that the induced current always tends to oppose the cause which produce it. So in order to do work against opposing force we have to put extra effort. This extra work leads to periodic change in magnetic flux hence more current is induced.
What is Lenz’s Law?
The induced electromotive force with different polarities induces a current whose magnetic field opposes the change in magnetic flux through the loop in order to ensure that original flux is maintained through the loop when current flows in it.
Lenz’s Law Formula
The Lenz’s Law is reflected in the formula of Faraday’s law. Here the negative sign is contributed from Lenz’s law. The expression is –
Emf = −N(Δϕ/Δt)
Where,
Emf is the induced voltage (also known as electromotive force).
N is the number of loops.
Δϕ =Change in magnetic flux.
Δt = Change in time