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If the current in a coil is doubled, the magnetic field strength around the coil

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Question: If the current in a coil is doubled, the magnetic field strength around the coil will?

Options:

  1. Double
  2. Halve
  3. Remain the same
  4. Increase by four times

Correct Answer: Double

Solution: 

The magnetic field strength around a coil is directly proportional to the current, so if the current is doubled, the magnetic field strength will also double.

If the current in a coil is doubled, the magnetic field strength around the coil

Practice Questions

Q1
If the current in a coil is doubled, the magnetic field strength around the coil will?
  1. Double
  2. Halve
  3. Remain the same
  4. Increase by four times

Questions & Step-by-Step Solutions

If the current in a coil is doubled, the magnetic field strength around the coil will?
  • Step 1: Understand that a coil creates a magnetic field when current flows through it.
  • Step 2: Know that the strength of the magnetic field depends on the amount of current flowing through the coil.
  • Step 3: Remember that if you double the current, you are increasing the flow of electricity through the coil.
  • Step 4: Since the magnetic field strength is directly related to the current, doubling the current will also double the magnetic field strength.
  • Magnetic Field Strength – The strength of the magnetic field around a coil is directly proportional to the electric current flowing through it, as described by Ampère's Law.
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