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What is the effect of doubling the distance from a long straight wire on the mag

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Question: What is the effect of doubling the distance from a long straight wire on the magnetic field strength?

Options:

  1. It doubles the magnetic field strength
  2. It halves the magnetic field strength
  3. It quadruples the magnetic field strength
  4. It has no effect on the magnetic field strength

Correct Answer: It halves the magnetic field strength

Solution: 

According to the Biot-Savart Law, the magnetic field strength is inversely proportional to the distance, so doubling the distance halves the magnetic field strength.

What is the effect of doubling the distance from a long straight wire on the mag

Practice Questions

Q1
What is the effect of doubling the distance from a long straight wire on the magnetic field strength?
  1. It doubles the magnetic field strength
  2. It halves the magnetic field strength
  3. It quadruples the magnetic field strength
  4. It has no effect on the magnetic field strength

Questions & Step-by-Step Solutions

What is the effect of doubling the distance from a long straight wire on the magnetic field strength?
  • Step 1: Understand that a long straight wire creates a magnetic field around it.
  • Step 2: Know that the strength of this magnetic field depends on the distance from the wire.
  • Step 3: Learn about the Biot-Savart Law, which tells us how the magnetic field strength changes with distance.
  • Step 4: 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 5: If you double the distance from the wire, the magnetic field strength becomes half of what it was before.
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