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Magnetism and Electromagnetism

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

Ferrits
Diamagnetic material
Ferromagnetic material
Paramagnetic material

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Magnetism and Electromagnetism
In the left hand rule, forefinger always represents

magnetic field
direction of force on the conductor
Voltage
current

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

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

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Magnetism and Electromagnetism
Air gap has_______eluctance as compared to iron or steel path

zero
little
lower
higher

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Magnetism and Electromagnetism
What is the flux density in a magnetic field in which the flux in 0.1 m2 is 600 Wb?

6 T
600 T
6,000 T
600 T

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

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