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Magnetism and Electromagnetism

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)?

270
360
180
90

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Magnetism and Electromagnetism
The susceptibility of paramagnetic materials generally lies between

KT3 and 1CT6
1CT3 and 1CT7
KT4 and KT8
10"2 and KT5

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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
2.4 At
240 At

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Magnetism and Electromagnetism
A coil of wire is placed in a changing magnetic field. If the number of turns in the coil is decreased, the voltage induced across the coil will

Decreases
None of the listed here
Remain same
Increases

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Magnetism and Electromagnetism
Hysteresis loop in case of magnetically hard materials is more in shape as compared to magnetically soft materials.

circular
triangular
rectangular
None of the listed here

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Magnetism and Electromagnetism
Gilbert is a unit of

permittivity
magnetomotive force
electromotive force
conductance

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