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प्रश्न
How are eddy currents generated in a conductor which is subjected to a magnetic field?
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उत्तर १
Magnetic flux associated with the plate keeps on changing as the plate moves in and out of the region between magnetic poles. This flux change induces eddy currents in the plate. Directions of eddy currents are opposite when the plate swings into the region between the poles and when it swings out of the region .
उत्तर २
When a conductor is moved in a magnetic field or in a changing magnetic field, Electric current is induced throughout the volume of a conductor and flouse in a closed loop. These concepts are said to be eddy currents.
संबंधित प्रश्न
Give one example of use of eddy currents.
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.
A metal sheet is placed in front of a strong magnetic pole. A force is needed to ______________ .
(a) hold the sheet there if the metal is magnetic
(b) hold the sheet there if the metal is nonmagnetic
(c) move the sheet away from the pole with uniform velocity if the metal is magnetic
(d) move the sheet away from the pole with uniform velocity if the metal is nonmagnetic.
Neglect any effect of paramagnetism, diamagnetism and gravity.
Write two examples of their useful applications .
How is Eddy current produced? How do they flow in a conductor?
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?
A constant retarding force of50 N is applied to a body of mass 20 kg moving initially with a speed of 15 ms-1. How long does the body take to stop?
