Direction of rotation of armature of motor can be found with the help of ______.

Correct option is B

The correct answer is (B) Fleming’s left-hand rule.

• Explanation: Fleming’s left-hand rule helps determine the direction of force (motion) on the armature of a motor, given the direction of the magnetic field and current.

• Incorrect Options Explanations:

  • Fleming’s right-hand rule: This rule is used to find the direction of induced current in a generator, not in a motor.
  • Right hand thumb rule: This rule is used to find the direction of magnetic field around a current-carrying conductor.
  • Maxwell’s corkscrew rule: This rule is used to find the direction of the magnetic field in relation to a moving electric charge, not for motor rotation.

Information Booster:

• Fleming’s left-hand rule:
  • Thumb represents the direction of motion (force).
  • First finger represents the direction of magnetic field.
  • Second finger represents the direction of current.
• Armature: The rotating part of a motor, where mechanical energy is converted into electrical energy.