Asked in MDCAT Test Series 26 — Electromagnetic InductionModerate

Faraday's law explains how electric field will interact with:

Correct answer: B. Magnetic field

  • A. Electric field
  • B. Magnetic field
  • C. Battery
  • D. None of these

Explanation

Faraday's law is one of the fundamental principles of electromagnetism. It states that a changing magnetic field will induce an electric field. This means that if you have a magnetic field that is changing over time, it will create an electric field that is also changing over time. The electric field will interact with charged particles, such as electrons, causing them to move. This movement of charged particles generates an electric current. This principle is used in many devices, including generators, transformers, and motors. For example, a generator uses Faraday's law to convert mechanical energy into electrical energy. When a coil of wire is rotated in a magnetic field, the changing magnetic field induces an electric field in the coil, which generates an electric current. This current can be used to power electrical devices.

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About Electromagnetic Induction

Changing magnetic flux induces an emf according to Faraday's law, while Lenz's law gives the direction that opposes the change producing it. Transformers apply induction between coils to step alternating voltage up or down, with turns ratio, current transformation and energy losses determining practical operation.

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