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Magnetism and Electromagnetism

Magnetism and Electromagnetism
Magnetism of a magnet can be destroyed by

Heating
Hammering
By inductive action of another magnet
All of the listed here

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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
The two conductors of a transmission line carry equal current I in opposite directions. The force on each conductor is

proportional to 7
proportional to X
inversely proportional to I
proportional to distance between the conductors

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Magnetism and Electromagnetism
The magnetic materials exhibit the property of magnetisation because of

orbital motion of electrons
spin of nucleus
either of these
spin of electrons

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Magnetism and Electromagnetism
When the current through the coil of an electromagnet reverses, the

direction of the magnetic field remains unchanged
direction of the magnetic field reverses
magnetic field expands
magnetic field collapses

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Magnetism and Electromagnetism
Which of the following is not a unit of flux?

Maxwell
Tesla
Weber
All of the listed here

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MORE MCQ ON Magnetism and Electromagnetism

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