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Magnetism and Electromagnetism

Magnetism and Electromagnetism
Hysteresis loop in case of magnetically hard materials is more in shape as compared to magnetically soft materials.

rectangular
None of the listed here
triangular
circular

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

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

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Magnetism and Electromagnetism
The unit of relative permeability is

Hennry
Its dimensionless
Hennry/meter
None of the listed here

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Magnetism and Electromagnetism
The relative permeability is less than unity is case of

Diamagnetic material
Paramagnetic material
Ferrits
Ferromagnetic material

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Magnetism and Electromagnetism
A 300 mm long conductor is carrying a current of 10 A and is situated at right angles to a magnetic field having a flux density of 0.8 T ; the force on the conductor will be

24 N
240 N
0.24 N
2.4 N

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Magnetism and Electromagnetism
For a given wire-wound core, an increase in current through the coil

Reverses the flux lines
Causes no change in flux density
Decreases the flux density
Increases the flux density

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MORE MCQ ON Magnetism and Electromagnetism

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