Single correct option
The principle on which an electric generator works is
- A. Heating effect of current
- B. Magnetic effect of current
- C. Chemical effect of current
- D. Electromagnetic induction
Show answer and solution
Answer: (D) Electromagnetic induction
A generator rotates a coil in a magnetic field, so the flux through the coil changes and an emf is induced (Faraday's law). The magnetic effect of current is the principle of the electric motor, a common mix-up.
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