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प्रश्न
In which of the following devices, the eddy current is not used ______
विकल्प
Electromagnet
Induction furnace
Electric heater
Magnetic breaking in train
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उत्तर
In which of the following devices, the eddy current is not used Electric heater.
संबंधित प्रश्न
Give one example of use of eddy currents.
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.
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.
How are eddy currents generated in a conductor which is subjected to a magnetic field?
Write two examples of their useful applications .
How can the disadvantages of eddy currents be minimized?
Why and where are eddy currents are undesirable? How are they minimized?
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 ______.
What are eddy currents?
Two simple pendula of length L and 4L are pulled aside to the right and are at rest so that they make an angle 30° with the vertical. They are then released simultaneously at time t = 0. The time after which they will be in phase is ______.
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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.
