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Magnetism and Electromagnetism

Magnetism and Electromagnetism
Reciprocal of permeability is

Reluctivity
conductance
Susceptibility
Permeability

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Magnetism and Electromagnetism
Magnetising steel is normals difficult because

it corrodes easily
it has high specific gravity
it has low permeability
it has high permeability

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Magnetism and Electromagnetism
What is the magneto-motive force in a 75-turn coil of wire when there are 4 A of current through it?

300 AT
0.3 AT
3 AT
30 AT

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Magnetism and Electromagnetism
Unit for quantity of electricity is

Ampere-hour
Joule
Ampere
Coulomb

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Magnetism and Electromagnetism
When a solenoid is activated, the force that moves the plunger is

varying voltage
a permanent magnetic field
a steady current
an electromagnetic field

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Magnetism and Electromagnetism
For a given wirewound core, an increase in current through the coil

reverses the flux lines
causes no change in flux density
increases the flux density
decreases the flux density

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MORE MCQ ON Magnetism and Electromagnetism

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