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Magnetism and Electromagnetism

Magnetism and Electromagnetism
What is the magnetomotive force (mmf) of a wire with 8 turns carrying three amperes of current?

24 At
2.4 At
240 At
2,400 At

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Magnetism and Electromagnetism
The direction of magnetic lines of force is

From south pole to north pole
From one end of the magnet to another
None of the listed here
From north pole to south pole

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Magnetism and Electromagnetism
Magnetism of a magnet can be destroyed by

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

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Magnetism and Electromagnetism
The main constituent of permalloy is

Tungsten
Nickel
Chromium
Cobalt

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Magnetism and Electromagnetism
The direction of a magnetic field within a magnet is

back to front
from north to south
from south to north
front to back

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Magnetism and Electromagnetism
Tesla is a unit of

Flux
Flux density
Field strength
Inductance

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MORE MCQ ON Magnetism and Electromagnetism

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