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प्रश्न
How can the disadvantages of eddy currents be minimized?
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उत्तर १
Eddy currents heat up the core and dissipate electrical energy in the form of heat. Eddy currents are minimised by using laminations of metal to make a metal core. The laminations are separated by an insulating materials like lacquer. The plane of the lamination must be arranged parallel to the magnetic field, so that they current acroos the eddy current paths. This arrangements reduces the strength of the eddy currents.
उत्तर २
Minimize eddy currents:-
(i) In order to reduce the eddy current loss, the resistance of the core should be increased. Because of it, we laminate the core that will have relatively high resistance.
(ii) The plane of these sheets is placed perpendicular to the direction of the current so that they would cancel each other currents.
संबंधित प्रश्न
Metallic (nonferromagnetic) and nonmetallic particles in a solid waste may be separated as follows. The waste is allowed to slide down an incline over permanent magnets. The metallic particles slow down as compared to the nonmetallic ones and hence are separated. Discuss the role of eddy currents in the process.
A metallic bob A oscillates through the space between the poles of an electromagnet (See the figure). The oscillations are more quickly damped when the circuit is on, as compared to the case when the circuit is off. Explain.
State applications of eddy currents.
Give the uses of Foucault current.
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 ______.
Identify the wrong statement.
If the length of a simple pendulum increases by 5%, then its period shall increase by ______.
Eddy currents are also known as ______
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.
