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What happens to the magnetic field strength if the distance from a long straight

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Question: What happens to the magnetic field strength if the distance from a long straight conductor is doubled?

Options:

  1. It doubles
  2. It halves
  3. It quadruples
  4. It becomes zero

Correct Answer: It halves

Solution: 

The magnetic field strength around a long straight conductor is inversely proportional to the distance from the conductor. Therefore, if the distance is doubled, the magnetic field strength halves.

What happens to the magnetic field strength if the distance from a long straight

Practice Questions

Q1
What happens to the magnetic field strength if the distance from a long straight conductor is doubled?
  1. It doubles
  2. It halves
  3. It quadruples
  4. It becomes zero

Questions & Step-by-Step Solutions

What happens to the magnetic field strength if the distance from a long straight conductor is doubled?
  • Step 1: Understand that a long straight conductor creates a magnetic field around it.
  • Step 2: Know that the strength of this magnetic field depends on the distance from the conductor.
  • Step 3: Remember that the magnetic field strength is inversely proportional to the distance. This means that as the distance increases, the magnetic field strength decreases.
  • Step 4: If the distance from the conductor is doubled, it means you are moving further away from it.
  • Step 5: Since the distance is doubled, the magnetic field strength will be halved.
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