Asked in MDCAT Test Series 26 — Electromagnetic Induction

A moving charge is surrounded by:

Correct answer: A. 2 fields

  • A. 2 fields
  • B. 4 fields
  • C. 3 fields
  • D. None of these

Explanation

A moving charge, or an electric charge in motion, generates two types of fields:1. Electric Field (E): An electric field is produced by a stationary charge or a moving charge. It is a vector field that exerts a force on other charged objects. The electric field extends in all directions around the charge, and its strength depends on the magnitude of the charge and the distance from the charge.2. Magnetic Field (B): A magnetic field is generated by a moving charge or a current-carrying wire. It is also a vector field and exerts forces on other moving charges or current-carrying wires. The magnetic field forms loops around the direction of the current flow, and its strength depends on the current and the distance from the current-carrying wire.So, a moving charge is surrounded by both electric and magnetic fields, resulting in a total of two fields.

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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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