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A circular loop of wire is placed in a uniform magnetic field. What happens to t

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Question: A circular loop of wire is placed in a uniform magnetic field. What happens to the induced EMF if the area of the loop is increased?

Options:

  1. Increases
  2. Decreases
  3. Remains the same
  4. Depends on the magnetic field strength

Correct Answer: Increases

Solution: 

According to Faraday\'s law of electromagnetic induction, the induced EMF is proportional to the rate of change of magnetic flux. Increasing the area increases the flux, thus increasing the induced EMF.

A circular loop of wire is placed in a uniform magnetic field. What happens to t

Practice Questions

Q1
A circular loop of wire is placed in a uniform magnetic field. What happens to the induced EMF if the area of the loop is increased?
  1. Increases
  2. Decreases
  3. Remains the same
  4. Depends on the magnetic field strength

Questions & Step-by-Step Solutions

A circular loop of wire is placed in a uniform magnetic field. What happens to the induced EMF if the area of the loop is increased?
  • Step 1: Understand that a circular loop of wire is placed in a magnetic field.
  • Step 2: Know that the magnetic field has a certain strength and direction.
  • Step 3: Learn about magnetic flux, which is the amount of magnetic field passing through the loop.
  • Step 4: Recognize that the area of the loop affects the magnetic flux; a larger area means more magnetic field lines can pass through.
  • Step 5: Remember Faraday's law, which states that the induced EMF (electromotive force) is related to the change in magnetic flux over time.
  • Step 6: If the area of the loop increases, the magnetic flux through the loop also increases.
  • Step 7: Since the induced EMF is proportional to the change in magnetic flux, an increase in area leads to an increase in induced EMF.
  • Faraday's Law of Electromagnetic Induction – The induced EMF in a circuit is proportional to the rate of change of magnetic flux through the circuit.
  • Magnetic Flux – Magnetic flux is the product of the magnetic field strength and the area through which it passes, taking into account the angle between the field and the normal to the surface.
  • Induced EMF – Induced EMF is the voltage generated by a change in magnetic flux through a loop of wire.
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