When a current carrying conductor placed in an external magnetic field, experience a force. The device whose working based on this principle is:
Correct answer: B. Electric motor
- A. Electric bell
- B. Electric motor
- C. Dynamo
- D. None of these
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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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