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What is the effect of increasing the radius of a circular loop carrying current

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Question: What is the effect of increasing the radius of a circular loop carrying current on the magnetic field at its center?

Options:

  1. It increases the magnetic field
  2. It decreases the magnetic field
  3. It has no effect
  4. It reverses the direction of the magnetic field

Correct Answer: It decreases the magnetic field

Solution: 

The magnetic field at the center of a circular loop is inversely proportional to the radius; thus, increasing the radius decreases the magnetic field.

What is the effect of increasing the radius of a circular loop carrying current

Practice Questions

Q1
What is the effect of increasing the radius of a circular loop carrying current on the magnetic field at its center?
  1. It increases the magnetic field
  2. It decreases the magnetic field
  3. It has no effect
  4. It reverses the direction of the magnetic field

Questions & Step-by-Step Solutions

What is the effect of increasing the radius of a circular loop carrying current on the magnetic field at its center?
Correct Answer: Magnetic field decreases.
  • Step 1: Understand that a circular loop can carry an electric current.
  • Step 2: Know that when current flows through the loop, it creates a magnetic field.
  • Step 3: Identify that the magnetic field strength at the center of the loop depends on the radius of the loop.
  • Step 4: Learn that the relationship between the magnetic field strength and the radius is inversely proportional.
  • Step 5: Realize that 'inversely proportional' means that as one value increases, the other value decreases.
  • Step 6: Conclude that if you increase the radius of the loop, the magnetic field strength at the center will decrease.
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