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Magnetism and Electromagnetism

Magnetism and Electromagnetism
If the cross-sectional area of a magnetic field increases, but the flux remains the same, the flux density

remains the same
doubles
increases
decreases

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Magnetism and Electromagnetism
The attraction capacity of electromagnet will increase if the

Flux density decreases
Core length increases
Core area increases
Flux density increases

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Magnetism and Electromagnetism
The unit for permeability is

At/Wb
Wb/At × m
Wb
At/m

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Magnetism and Electromagnetism
The uniform magnetic field is

The field of a set of parallel conductors
The field of a single conductor
None of the listed here
The field in which all lines of magnetic flux are parallel and equidistant

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Magnetism and Electromagnetism
Materials subjected to rapid reversal of magnetism should have

Large area of B-H loop
High co-ercivity and high retentivity
High co-ercivity and low density
High permeability and low hysteresis loss

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

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

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MORE MCQ ON Magnetism and Electromagnetism

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