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Magnetism and Electromagnetism

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

600 T
6,000 T
600 T
6 T

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Magnetism and Electromagnetism
Temporary magnets are used in

All of the listed here
Motors
Loud speakers
Generators

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Magnetism and Electromagnetism
What is the magneto-motive force (mmf) of a wire with 8 turns carrying three amperes of current?

2,400 At
24 At
2.4 At
240 At

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

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

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Magnetism and Electromagnetism
The ability of a material to remain magnetized after removal of the magnetizing force is known as

hysteresis
reluctance
retentivity
permeability

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

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

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MORE MCQ ON Magnetism and Electromagnetism

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