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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?

2.4 At
240 At
2,400 At
24 At

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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?

24 At
2.4 At
2,400 At
240 At

ANSWER DOWNLOAD EXAMIANS APP

Magnetism and Electromagnetism
For a given wire-wound core, an increase in current through the coil

Causes no change in flux density
Decreases the flux density
Increases the flux density
Reverses the flux lines

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Magnetism and Electromagnetism
Susceptibility is positive for

non-magnetic substances
diamagnetic substances
ferromagnetic substances
None of these

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Magnetism and Electromagnetism
Which of the following is not a unit of flux?

Tesla
Weber
Maxwell
All of the listed here

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Magnetism and Electromagnetism
A keeper is used to

Change the direction of magnetic lines
Amplify flux
Provide a closed path for flux
Restore lost flux

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MORE MCQ ON Magnetism and Electromagnetism

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