Question on: JAMB Physics - 2024
Which of the following operates based on magnetic effect of electric current?
A
electric heater
B
photocell
C
Dynamo
D
Cold cathode
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Correct Option: C
The correct answer is the dynamo because it operates based on the magnetic effect of electric current.
- Dynamo: A generator that converts mechanical energy into electrical energy using electromagnetic induction.
- Electric heater: Operates based on the heating effect of electric current.
- Photocell: Converts light energy into electrical energy using the photoelectric effect.
- Cold cathode: Operates based on thermionic or field emission principles.
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