everyday science MCQ #4530

everyday science MCQ #4530

1. Question 1

   Q1. An electric motor runs on which principle?

   • A) Electrical energy can be converted into chemical energy in the presence of magnetic fields
   • B) A conductor carrying current in the direction perpendicular to the external magnetic field feels a force
   • C) The current flowing through a conductor causes the generation of heat that drives the engine
   • D) A changing magnetic field induces an electromotive force in a conductor

   Answer: A conductor carrying current in the direction perpendicular to the external magnetic field feels a force

   Explanation: An electric motor works on the Lorentz force principle: a current-carrying conductor placed perpendicular to a magnetic field experiences a mechanical force, causing rotation.