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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)?

360
90
180
270

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Magnetism and Electromagnetism
A conductor of length L has current I passing through it, when it is placed parallel to a magnetic field. The force experienced by the conductor will be

BLI
None of the listed here
BLI2
Zero

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Magnetism and Electromagnetism
The electromagnet has 50 turns and a current of 1A flows through the coil. If the length of the magnet circuit is 200 mm, what is the magnetic field strength?

250 AT/m
2500 AT/m
25 AT/m
0.25 AT/m

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Magnetism and Electromagnetism
Which of the following type of materials are not very important for engineering applications?

Diamagnetic material
Ferro magnetic material
None of the listed here
Paramagnetic material

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Magnetism and Electromagnetism
The induced voltage across a stationary conductor in a stationary magnetic field is

zero
decreased
increased
reversed in polarity

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Magnetism and Electromagnetism
Magnetising steel is normals difficult because

it has low permeability
it corrodes easily
it has high specific gravity
it has high permeability

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MORE MCQ ON Magnetism and Electromagnetism

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