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A coil of wire is placed in a magnetic field. If the magnetic field strength is

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Question: A coil of wire is placed in a magnetic field. If the magnetic field strength is increased, what happens to the induced EMF in the coil?

Options:

  1. It increases
  2. It decreases
  3. It remains the same
  4. It becomes zero

Correct Answer: It increases

Solution: 

According to Faraday\'s law of electromagnetic induction, the induced EMF in a coil is directly proportional to the rate of change of magnetic flux. Increasing the magnetic field strength increases the magnetic flux, thus increasing the induced EMF.

A coil of wire is placed in a magnetic field. If the magnetic field strength is

Practice Questions

Q1
A coil of wire is placed in a magnetic field. If the magnetic field strength is increased, what happens to the induced EMF in the coil?
  1. It increases
  2. It decreases
  3. It remains the same
  4. It becomes zero

Questions & Step-by-Step Solutions

A coil of wire is placed in a magnetic field. If the magnetic field strength is increased, what happens to the induced EMF in the coil?
  • Step 1: Understand what a coil of wire is. It is a loop or series of loops of wire that can conduct electricity.
  • Step 2: Know what a magnetic field is. It is an area around a magnet where magnetic forces can be felt.
  • Step 3: Learn about magnetic flux. It is the amount of magnetic field passing through the coil.
  • Step 4: Remember Faraday's law of electromagnetic induction. It states that the induced EMF (electromotive force) in a coil is related to how quickly the magnetic flux changes.
  • Step 5: Realize that increasing the magnetic field strength means more magnetic field lines are passing through the coil.
  • Step 6: Understand that when the magnetic field strength increases, the magnetic flux through the coil also increases.
  • Step 7: Conclude that since the magnetic flux is increasing, the induced EMF in the coil will also increase.
  • Faraday's Law of Electromagnetic Induction – The induced EMF in a coil is proportional to the rate of change of magnetic flux through the coil.
  • Magnetic Flux – Magnetic flux is the product of the magnetic field strength and the area through which it passes, and it influences the induced EMF.
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