Advertisements
Advertisements
प्रश्न
How can the disadvantages of eddy currents be minimized?
Advertisements
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
Describe briefly three main useful application of eddy currents ?
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.
Write two examples of their useful applications .
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 ______.
What are eddy currents?
Which one is not an application of eddy current?
Eddy currents are also known as ______
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.
