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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.

None of the listed here
rectangular
circular
triangular

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Magnetism and Electromagnetism
The stray line of magnetic flux is defined as

A line vertical to the flux lines
A line of magnetic flux which does not follow the designed path
A line of magnetic flux in a non-uniform field
The mean length of a ring shaped coil

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

magnetic field
Voltage
current
direction of force on the conductor

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Magnetism and Electromagnetism
When the speed at which a conductor is moved through a magnetic field is increased, the induced voltage

decreases
reaches zero
remains constant
increases

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Magnetism and Electromagnetism
The change of cross-sectional area of conductor in magnetic field will affect

resistance of conductor
both of the listed here
reluctance of conductor
None of these

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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?

300 At
30 At
187 At
18.75 At

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