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What happens to the magnetic field when the distance from a long straight conduc

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Question: What happens to the magnetic field when the distance from a long straight conductor is doubled? (2023)

Options:

  1. It doubles
  2. It halves
  3. It remains the same
  4. It quadruples

Correct Answer: It halves

Exam Year: 2023

Solution: 

The magnetic field around a long straight conductor decreases with distance. Specifically, it is inversely proportional to the distance from the conductor.

What happens to the magnetic field when the distance from a long straight conduc

Practice Questions

Q1
What happens to the magnetic field when the distance from a long straight conductor is doubled? (2023)
  1. It doubles
  2. It halves
  3. It remains the same
  4. It quadruples

Questions & Step-by-Step Solutions

What happens to the magnetic field when the distance from a long straight conductor is doubled? (2023)
  • Step 1: Understand that a long straight conductor carries an electric current.
  • Step 2: Know that this current creates a magnetic field around the conductor.
  • Step 3: Remember that the strength of the magnetic field decreases as you move away from the conductor.
  • Step 4: Recognize that if you double the distance from the conductor, the magnetic field strength will be less than it was before.
  • Step 5: Learn that the magnetic field strength is inversely proportional to the distance, meaning if the distance increases, the magnetic field strength decreases.
  • Magnetic Field Behavior – The magnetic field around a long straight conductor decreases with distance, following an inverse relationship.
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