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

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

Options:

  1. Electromagnetic induction
  2. Lorentz force
  3. Magnetic resonance
  4. Electrolysis

Correct Answer: Lorentz force

Solution: 

An electric motor operates on the principle of the Lorentz force, which states that a current-carrying conductor in a magnetic field experiences a force.

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

Practice Questions

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

Questions & Step-by-Step Solutions

What is the principle behind the working of an electric motor?
  • Step 1: Understand that an electric motor converts electrical energy into mechanical energy.
  • Step 2: Learn about the Lorentz force, which is the force experienced by a wire carrying electric current in a magnetic field.
  • Step 3: Recognize that when electricity flows through a wire in a magnetic field, the wire experiences a push or pull due to the Lorentz force.
  • Step 4: This push or pull causes the wire (or coil) to move, creating rotational motion.
  • Step 5: The rotational motion of the wire is what powers the motor and does work, like turning a fan or driving a car.
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