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Magnetism and Electromagnetism

Magnetism and Electromagnetism
The electromagnet has 50 turns and a current of 1A flows through the coil. If the length of the magnet circuit is 200 mm, what is the magnetic field strength?

250 AT/m
25 AT/m
2500 AT/m
0.25 AT/m

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Magnetism and Electromagnetism
Gilbert is a unit of

conductance
magnetomotive force
permittivity
electromotive force

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Magnetism and Electromagnetism
When two ends of a circular uniform wire are joined to the terminals of a battery, the field at the center of the circle

will be infinite
will depend on the radius of the circle
will be zero
will depend on the amount of e.m.f. applied

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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?

12
4
6
8

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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 highest permeability of the iron rod
The permeability at the end of the iron rod

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Magnetism and Electromagnetism
If the cross-sectional area of a magnetic field increases, but the flux remains the same, the flux density

decreases
remains the same
doubles
increases

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MORE MCQ ON Magnetism and Electromagnetism

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