alleryWhich of the following is the working principle of an electric generator?
ACoulomb's law of electrostatics
BJoule heating effect
CElectromagnetic induction
DOhm's law
Answer & Solution
Correct answer: C. Electromagnetic induction
1. A generator converts mechanical energy into electrical energy.
2. A coil rotates in a magnetic field, changing the flux through the coil.
3. The changing flux induces an EMF in the coil (Faraday's law).
4. This is the principle of electromagnetic induction.
5. So generators work on electromagnetic induction.
6. Ohm's law and Joule heating describe current behaviour, not generation.
_Source: syllabus Science Ch 13 'Magnetic Effects of Electric Current' (learncbse.in extract)_
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