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Magnetism and Electromagnetism

Magnetism and Electromagnetism
The commonly used material for shielding or screening magnetism is

Soft iron
Aluminium
Copper
Brass

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

24 At
240 At
2.4 At
2,400 At

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

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

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Magnetism and Electromagnetism
Substances which have permeability less than the permeability of free space are known as

Bipolar
Ferro magnetic material
Diamagnetic material
Paramagnetic material

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Magnetism and Electromagnetism
The bar magnet has

None of the listed here
Both dipole and monopole moment
Dipole moment
Monopole moment

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Magnetism and Electromagnetism
Gilbert is a unit of

conductance
permittivity
electromotive force
magnetomotive force

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MORE MCQ ON Magnetism and Electromagnetism

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