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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?

2,400 At
2.4 At
24 At
240 At

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Magnetism and Electromagnetism
The unit for reluctance is

At/m
tesla
Wb
At/Wb

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Magnetism and Electromagnetism
An electromagnetic field exists only when there is

an increasing current
current
decreasing current
voltage

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Magnetism and Electromagnetism
A permeable substance is one

which is a strong magnet
which is a good conductor
which is a bad conductor
through which the magnetic lines of force can pass very easily

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Magnetism and Electromagnetism
What is the flux density when the flux is 5.5 Wb and the cross-sectional area is 6 × 10–3 m2?

91 T
91.7 T
9.7 T
917 T

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

Weber
None of the listed here
Tesla
Lumens

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MORE MCQ ON Magnetism and Electromagnetism

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