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What is the principle behind the operation of an electric motor?

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Question: What is the principle behind the operation of an electric motor?

Options:

  1. Electromagnetic induction
  2. Lorentz force
  3. Magnetic resonance
  4. Thermal expansion

Correct Answer: Lorentz force

Solution: 

Electric motors operate on the principle of the Lorentz force, where a current-carrying conductor in a magnetic field experiences a force that causes it to rotate.

What is the principle behind the operation of an electric motor?

Practice Questions

Q1
What is the principle behind the operation of an electric motor?
  1. Electromagnetic induction
  2. Lorentz force
  3. Magnetic resonance
  4. Thermal expansion

Questions & Step-by-Step Solutions

What is the principle behind the operation of an electric motor?
Correct Answer: Lorentz force
  • Step 1: Understand that an electric motor uses electricity to create motion.
  • Step 2: Know that a conductor (like a wire) carries electric current.
  • Step 3: Recognize that a magnetic field is created by magnets or electromagnets.
  • Step 4: Learn about the Lorentz force, which is the force experienced by the conductor when it is in the magnetic field.
  • Step 5: Realize that this force causes the conductor to move or rotate.
  • Step 6: Understand that the rotation of the conductor is what creates mechanical motion in the motor.
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