What happens to the induced current in a coil if the magnetic field is suddenly

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Question: What happens to the induced current in a coil if the magnetic field is suddenly removed?

Options:

Correct Answer: Induced current stops immediately

Solution:

If the magnetic field is suddenly removed, the change in magnetic flux becomes zero, and thus the induced current stops immediately.

What happens to the induced current in a coil if the magnetic field is suddenly removed?

What happens to the induced current in a coil if the magnetic field is suddenly removed?

Step 1: Understand that a coil can have an induced current when there is a changing magnetic field around it.
Step 2: Recognize that the induced current is created due to a change in magnetic flux through the coil.
Step 3: Know that magnetic flux is the amount of magnetic field passing through the coil.
Step 4: When the magnetic field is suddenly removed, the magnetic flux through the coil changes to zero.
Step 5: Since the change in magnetic flux is now zero, there is no longer any change to induce current.
Step 6: Therefore, the induced current in the coil stops immediately when the magnetic field is removed.

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.
Lenz's Law – The law that states the direction of induced current will oppose the change in magnetic flux that produced it.