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Magnetism and Electromagnetism

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

240 At
24 At
2.4 At
2,400 At

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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?

600 T
6 T
6,000 T
600 T

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Magnetism and Electromagnetism
Which of the following materials are diamagnetic?

Silver and copper
Iron
Silver
Copper

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Magnetism and Electromagnetism
Which of the following is the unit of magnetic flux density?

Lumens
Tesla
Weber
None of the listed here

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Magnetism and Electromagnetism
Strength of an electromagnet can be increased by

Increasing the number of turns
Increasing current supply
Increasing the cross-sectional area
All of the listed here

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Magnetism and Electromagnetism
For which of the following materials the saturation value is the highest?

Diamagnetic materials
Paramagnetic materials
Ferrites
Ferromagnetic materials

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MORE MCQ ON Magnetism and Electromagnetism

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