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Magnetism and Electromagnetism

Magnetism and Electromagnetism
The unit for permeability is

Wb
At/Wb
At/m
Wb/At × m

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Magnetism and Electromagnetism
What is the reluctance of a material that has a length of 0.07 m, a cross-sectional area of 0.014 m2, and a permeability of 4,500 Wb/At × m?

1111 At/Wb
111 At/Wb
11 At/Wb
1 At/Wb

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Magnetism and Electromagnetism
A permeable substance is one

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

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Magnetism and Electromagnetism
When the north poles of two bar magnets are brought close together, there will be

no force
a force of attraction
a force of repulsion
a downward force

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

2.4 AT
24 AT
240 AT
0.24 AT

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

24 At
2,400 At
240 At
2.4 At

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MORE MCQ ON Magnetism and Electromagnetism

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