What happens to the induced current if the magnetic field is suddenly removed fr

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Question: What happens to the induced current if the magnetic field is suddenly removed from a coil? (2022)

Options:

Correct Answer: It stops immediately

Exam Year: 2022

Solution:

If the magnetic field is suddenly removed, the change in magnetic flux becomes zero, leading to an immediate stop in the induced current.

What happens to the induced current if the magnetic field is suddenly removed from a coil? (2022)

What happens to the induced current if the magnetic field is suddenly removed from a coil? (2022)

Step 1: Understand that a coil can have a magnetic field around it when there is current flowing through it.
Step 2: Know that when the magnetic field is present, it creates magnetic flux in the coil.
Step 3: Realize that induced current is generated in the coil when there is a change in magnetic flux.
Step 4: When the magnetic field is suddenly removed, the magnetic flux in the coil changes quickly.
Step 5: If the magnetic field is completely removed, the change in magnetic flux becomes zero.
Step 6: Since there is no change in magnetic flux, the induced current stops immediately.

Electromagnetic Induction – The principle that a change in magnetic flux through a coil induces an electromotive force (EMF) and consequently a current.
Faraday's Law of Induction – The law stating that the induced EMF in a circuit is directly proportional to the rate of change of magnetic flux through the circuit.
Lenz's Law – The law that states the direction of induced current will oppose the change in magnetic flux that produced it.