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Magnetism and Electromagnetism

Magnetism and Electromagnetism
The ability of a material to remain magnetized after removal of the magnetizing force is known as

reluctance
retentivity
permeability
hysteresis

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Magnetism and Electromagnetism
The change of cross-sectional area of conductor in magnetic field will affect

both of the listed here
reluctance of conductor
resistance of conductor
None of these

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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)?

270
90
360
180

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Magnetism and Electromagnetism
One telsa is equal to

1 mWb/m²
1 Wb/mm²
1 Wb/m
1 Wb/m²

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Magnetism and Electromagnetism
What is the reluctance of a material that has a length of 0.07 m, a cross-sectional area of 0.014 m2, and a permeability of 4,500 Wb/At × m?

11 At/Wb
111 At/Wb
1111 At/Wb
1 At/Wb

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Magnetism and Electromagnetism
How does the magnetic compass needle behave in a magnetic field?

It starts rotating
It assures a position which follows a line of magnetic flux
None of the listed here
It assures a position right angle to magnetic field

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MORE MCQ ON Magnetism and Electromagnetism

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