Practice portal › Electromagnetic Induction › Applications and Conceptual

'The polarity of the induced emf is such that it tends to produce a current which opposes the change in magnetic flux that produced it.' This statement is known as the law of ______.

Asked in GUJCET 2022 · Applications and conceptual

Answer: (4) Lenz

Step-by-step solution

Idea: two laws describe induction. Faraday's law gives how large the induced emf is; Lenz's law gives its direction.

The quoted statement is about direction (polarity): the induced current opposes the change in flux that causes it.

This is Lenz's law; the minus sign in ε = -(dΦ_B)/(dt) expresses it.

So the statement is Lenz's law.

Why the other options are wrong

Reading this solution needs no sign-in. You only sign in to practise against the clock and keep your progress.

Practise this with a timer