Question

"Whenever magnetic flux linked with a closed coil changes, an induced emf is setup in the coil and lasts as long as the change in magnetic flux continues." This is:

• A. Lenz’s Law
• B. Faraday’s first law of electromagnetic induction
• C. Faraday’s second law of electromagnetic induction
• D. Biot-Savart law

Hint:

Faraday’s First Law = Emf is induced when magnetic flux changes. Second Law gives the magnitude: \( \text{emf} = -\dfrac{d\Phi}{dt} \).

Answer 1

The Correct Option is B

Faraday's First Law states that an emf is induced in a circuit whenever the magnetic flux linked with it changes.
The emf persists only while the flux is changing.