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Magnetism and Electromagnetism

Magnetism and Electromagnetism
Reciprocal of permeability is

Reluctivity
Permeability
conductance
Susceptibility

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Magnetism and Electromagnetism
Strength of an electromagnet can be increased by

All of the listed here
Increasing the cross-sectional area
Increasing the number of turns
Increasing current supply

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Magnetism and Electromagnetism
Degaussing is the process of

Demagnetising metallic parts
Remagnetising metallic parts
Removing gases from the materials
Removal of magnetic impurities

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Magnetism and Electromagnetism
When two ends of a circular uniform wire are joined to the terminals of a battery, the field at the center of the circle

will depend on the amount of e.m.f. applied
will be zero
will be infinite
will depend on the radius of the circle

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Magnetism and Electromagnetism
Fleming's left hand rule is used to find

Direction of flux in a solenoid
Polarity of a magnetic pole
Direction of magnetic field due to current carrying conductor
Direction of force on a current carrying conductor in a magnetic field

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Magnetism and Electromagnetism
Temporary magnets are used in

Motors
All of the listed here
Loud speakers
Generators

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MORE MCQ ON Magnetism and Electromagnetism

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