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What is the direction of the magnetic field produced by a current-carrying wire

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Question: What is the direction of the magnetic field produced by a current-carrying wire when viewed from one end? (2023)

Options:

  1. Always towards the wire
  2. Always away from the wire
  3. Depends on the direction of current
  4. Always perpendicular to the wire

Correct Answer: Depends on the direction of current

Exam Year: 2023

Solution: 

The direction of the magnetic field produced by a current-carrying wire depends on the direction of the current, as determined by the right-hand rule.

What is the direction of the magnetic field produced by a current-carrying wire

Practice Questions

Q1
What is the direction of the magnetic field produced by a current-carrying wire when viewed from one end? (2023)
  1. Always towards the wire
  2. Always away from the wire
  3. Depends on the direction of current
  4. Always perpendicular to the wire

Questions & Step-by-Step Solutions

What is the direction of the magnetic field produced by a current-carrying wire when viewed from one end? (2023)
  • Step 1: Identify the direction of the electric current flowing through the wire. This can be from positive to negative.
  • Step 2: Use your right hand to apply the right-hand rule. Point your thumb in the direction of the current.
  • Step 3: Curl your fingers around the wire. The direction your fingers curl represents the direction of the magnetic field lines.
  • Step 4: If you are looking at one end of the wire, the direction of the magnetic field will be in the direction your fingers point.
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