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If the current in a wire is doubled, how does the magnetic field at a point near

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Question: If the current in a wire is doubled, how does the magnetic field at a point near the wire change?

Options:

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

Correct Answer: It doubles

Solution: 

According to the Biot-Savart Law, the magnetic field is directly proportional to the current, so if the current is doubled, the magnetic field also doubles.

If the current in a wire is doubled, how does the magnetic field at a point near

Practice Questions

Q1
If the current in a wire is doubled, how does the magnetic field at a point near the wire change?
  1. It remains the same
  2. It doubles
  3. It quadruples
  4. It halves

Questions & Step-by-Step Solutions

If the current in a wire is doubled, how does the magnetic field at a point near the wire change?
Correct Answer: Magnetic field doubles.
  • Step 1: Understand that a wire carrying electric current creates a magnetic field around it.
  • Step 2: Learn about the Biot-Savart Law, which states that the magnetic field created by a current is directly related to the amount of current flowing through the wire.
  • Step 3: Recognize that if the current in the wire is increased (for example, doubled), the strength of the magnetic field will also increase.
  • Step 4: Conclude that if the current is doubled, the magnetic field at a point near the wire will also double.
  • Biot-Savart Law – The law that describes how electric currents produce magnetic fields, stating that the magnetic field is directly proportional to the current.
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