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Magnetism and Electromagnetism

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

None of the listed here
triangular
circular
rectangular

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Magnetism and Electromagnetism
The force between two long parallel conductors is inversely proportional to

Distance between the conductors
Radius of conductor
Product of current in two conductors
Current in one conductor

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Magnetism and Electromagnetism
Which of the following is expected to have the maximum permeability ?

Ebolite
Zinc
Copper
Brass

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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
270
90
180

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Magnetism and Electromagnetism
Two long parallel conductors carry 100 A. If the conductors are separated by 20 mm, the force per meter of length of each conductor will be

100 N
10 N
0.01 N
0.1 N

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Magnetism and Electromagnetism
What is the flux density when the flux is 5.5 Wb and the cross-sectional area is 6 × 10–3 m2?

91.7 T
91 T
917 T
9.7 T

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