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Magnetism and Electromagnetism

Magnetism and Electromagnetism
Tesla is a unit of

Field strength
Inductance
Flux density
Flux

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Magnetism and Electromagnetism
Gilbert is a unit of

permittivity
electromotive force
magnetomotive force
conductance

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

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

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Magnetism and Electromagnetism
A basic one-loop dc generator is rotated at 90 rev/s. How many times each second does the dc output voltage peak (reach maximum)?

360
180
270
90

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Magnetism and Electromagnetism
Core of an electromagnet should have

Both low coercivity and high susceptibility
Low coercivity
None of the listed here
High susceptibility

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Magnetism and Electromagnetism
The magnetism left in the iron after exciting field has been removed is known as

residual magnetism
permeance
susceptance
reluctance

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MORE MCQ ON Magnetism and Electromagnetism

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