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Question

A generator is a device that converts:

This question was previously asked in
RRB NTPC 2019 CBT 1 Question Paper (8-Mar-2021) (Shift 2)
The correct answer is
mechanical energy to electrical energy

Generator Energy Conversion Principle

A generator is an essential device in electrical engineering. Its primary function is to convert one form of energy into another.

Core Function: The fundamental purpose of a generator is to transform mechanical energy into electrical energy. This conversion is typically achieved through the principle of electromagnetic induction.

  • Input: Mechanical energy, often from a rotating source like a turbine (powered by wind, water, steam, etc.) or an engine.
  • Process: This mechanical energy causes relative motion between a magnetic field and conductors (coils of wire).
  • Output: According to Faraday's law of induction, this motion induces an electromotive force (voltage), resulting in the generation of electrical energy (current).

This process is the basis for most large-scale electricity production worldwide.

Therefore, the correct conversion is mechanical energy to electrical energy.

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