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Magnetism and Electromagnetism

Magnetism and Electromagnetism
What will be the current passing through the ring shaped air cored coil when number of turns is 800 and ampere turns are 3200?

8
6
12
4

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Magnetism and Electromagnetism
Which of the following is expected to have the maximum permeability ?

Copper
Brass
Zinc
Ebolite

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Magnetism and Electromagnetism
A basic one-loop dc generator is rotated at 90 rev/s. How many times each second does the dc output voltage peak (reach maximum)?

90
270
360
180

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Magnetism and Electromagnetism
Materials subjected to rapid reversal of magnetism should have

High permeability and low hysteresis loss
Large area of B-H loop
High co-ercivity and high retentivity
High co-ercivity and low density

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Magnetism and Electromagnetism
Air gap has_______eluctance as compared to iron or steel path

higher
lower
zero
little

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Magnetism and Electromagnetism
The initial permeability of an iron rod is

The permeability almost in non-magnetised state
The lowest permeability of the iron rod
The permeability at the end of the iron rod
The highest permeability of the iron rod

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MORE MCQ ON Magnetism and Electromagnetism

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