Question:
In which of the following devices, the eddy current effect is not used ?
In which of the following devices, the eddy current effect is not used ?
Updated On: May 5, 2024
- electromagnet
- electric heater
- induction furnace
- magnetic braking in train
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The Correct Option is B
Solution and Explanation
Electric heater does not involve Eddy currents. It uses Joule's heating effect.
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Concepts Used:
Electromagnetic Induction
Electromagnetic Induction is a current produced by the voltage production due to a changing magnetic field. This happens in one of the two conditions:-
- When we place the conductor in a changing magnetic field.
- When the conductor constantly moves in a stationary field.
Formula:
The electromagnetic induction is mathematically represented as:-
e=N × d∅.dt
Where
- e = induced voltage
- N = number of turns in the coil
- Φ = Magnetic flux (This is the amount of magnetic field present on the surface)
- t = time
Applications of Electromagnetic Induction
- Electromagnetic induction in AC generator
- Electrical Transformers
- Magnetic Flow Meter