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A loop of wire is moved into a magnetic field at a constant speed. What is the e

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Question: A loop of wire is moved into a magnetic field at a constant speed. What is the effect on the induced current as the loop enters the field?

Options:

  1. It increases
  2. It decreases
  3. It remains constant
  4. It becomes zero

Correct Answer: It increases

Solution: 

As the loop enters the magnetic field, the area of the loop within the field increases, leading to an increase in magnetic flux and thus an increase in the induced current according to Faraday\'s law.

A loop of wire is moved into a magnetic field at a constant speed. What is the e

Practice Questions

Q1
A loop of wire is moved into a magnetic field at a constant speed. What is the effect on the induced current as the loop enters the field?
  1. It increases
  2. It decreases
  3. It remains constant
  4. It becomes zero

Questions & Step-by-Step Solutions

A loop of wire is moved into a magnetic field at a constant speed. What is the effect on the induced current as the loop enters the field?
  • Step 1: Understand that a loop of wire is being moved into a magnetic field.
  • Step 2: Recognize that the magnetic field has lines of force that represent the magnetic flux.
  • Step 3: As the loop enters the magnetic field, more of the loop is inside the field.
  • Step 4: Realize that when more of the loop is in the magnetic field, the area of the loop within the field increases.
  • Step 5: Know that an increase in the area within the magnetic field leads to an increase in magnetic flux.
  • Step 6: Apply Faraday's law, which states that a change in magnetic flux induces an electric current in the loop.
  • Step 7: Conclude that as the loop enters the magnetic field, the induced current increases due to the increasing magnetic flux.
  • Electromagnetic Induction – The process by which a changing magnetic field induces an electromotive force (EMF) in a conductor.
  • Faraday's Law – The law stating that the induced EMF in a circuit is proportional to the rate of change of magnetic flux through the circuit.
  • Magnetic Flux – The product of the magnetic field strength and the area through which it passes, influencing the induced current.
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