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Magnetism and Electromagnetism

Magnetism and Electromagnetism
A magnetic field exists around

Aluminium
Moving Charges
Iron
Copper

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

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

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Magnetism and Electromagnetism
A material which is slightly repelled by a magnetic field is known as

diamagnetic material
conducting material
paramagnetic material
ferromagnetic material

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Magnetism and Electromagnetism
A permeable substance is one

Which is a strong magnet
Which is a bad conductor
Which is a good conductor
Through which the magnetic lines of force can pass very easily

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

30 At
187 At
300 At
18.75 At

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Magnetism and Electromagnetism
Materials subjected to rapid reversal of magnetism should have

High permeability and low hysteresis loss
High co-ercivity and low density
Large area of B-H loop
High co-ercivity and high retentivity

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MORE MCQ ON Magnetism and Electromagnetism

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