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If the magnetic field through a loop of wire is increasing, what is the directio

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Question: If the magnetic field through a loop of wire is increasing, what is the direction of the induced current?

Options:

  1. Clockwise
  2. Counterclockwise
  3. No current induced
  4. Depends on the field strength

Correct Answer: Counterclockwise

Solution: 

According to Lenz\'s law, the induced current will flow in a direction that opposes the change in magnetic flux. If the magnetic field is increasing, the induced current will be counterclockwise.

If the magnetic field through a loop of wire is increasing, what is the directio

Practice Questions

Q1
If the magnetic field through a loop of wire is increasing, what is the direction of the induced current?
  1. Clockwise
  2. Counterclockwise
  3. No current induced
  4. Depends on the field strength

Questions & Step-by-Step Solutions

If the magnetic field through a loop of wire is increasing, what is the direction of the induced current?
  • Step 1: Understand that a loop of wire can have a magnetic field passing through it.
  • Step 2: Recognize that if the magnetic field is increasing, it means more magnetic lines are passing through the loop.
  • Step 3: Remember Lenz's law, which states that the induced current will flow in a direction that opposes the change in magnetic flux.
  • Step 4: Since the magnetic field is increasing, the induced current will try to create a magnetic field that opposes this increase.
  • Step 5: Determine the direction of the opposing magnetic field. If the external magnetic field is pointing into the loop, the induced current must create a magnetic field pointing out of the loop.
  • Step 6: Use the right-hand rule: curl the fingers of your right hand in the direction of the induced current, and your thumb will point in the direction of the magnetic field created by the current.
  • Step 7: Since the induced magnetic field needs to point out of the loop, the current must flow counterclockwise.
  • Lenz's Law – Lenz's law states that the direction of induced current is such that it opposes the change in magnetic flux through a loop.
  • Magnetic Flux – Magnetic flux is the product of the magnetic field and the area through which it passes, and changes in flux can induce current.
  • Induced Current Direction – The direction of induced current can be determined using the right-hand rule in conjunction with Lenz's law.
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