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प्रश्न
Write two examples of their useful applications .
उत्तर १
Eddy currents are used Magnetic braking in trains, Electromagnetic damping, Induction furnace, Electric power meters.
उत्तर २
Uses of Eddy Current:-
- Induction furnace:- The heating effect of eddy current is used for melting metal in induction furnace.
- Electric Brakes:- It is an efficient system of brakes employed in electric trains when the train is to be stopped, a strong magnetic field is applied to the rotating drum. This results in the generation of large eddy currents
संबंधित प्रश्न
Give one example of use of eddy currents.
Why and where are eddy currents are undesirable? How are they minimized?
The plane in which eddy currents are produced in a conductor is inclined to the plane of the magnetic field at an angle equal to ______.
For high frequency, capacity offers
A metal plate is getting heated. It can be because ______.
- a direct current is passing through the plate.
- it is placed in a time varying magnetic field.
- it is placed in a space varying magnetic field, but does not vary with time.
- a current (either direct or alternating) is passing through the plate.
Consider a metallic pipe with an inner radius of 1 cm. If a cylindrical bar magnet of radius 0.8 cm is dropped through the pipe, it takes more time to come down than it takes for a similar unmagnetised cylindrical iron bar dropped through the metallic pipe. Explain.
