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Magnetism and Electromagnetism

Magnetism and Electromagnetism
Reciprocal of permeability is

Permeability
Susceptibility
conductance
Reluctivity

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Magnetism and Electromagnetism
Air gap has_______eluctance as compared to iron or steel path

little
higher
lower
zero

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

permeance
residual magnetism
reluctance
susceptance

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Magnetism and Electromagnetism
A square cross-sectional magnet has a pole strength of 1 x 10 Wb and cross sectional area of 20 mm x 20 mm. What is the strength at a distance of 100 mm from the unit pole in air ?

63380 N/Wb
633.8 N/Wb
63.38 N/Wb
6338 N/Wb

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Magnetism and Electromagnetism
The use of permanent magnets is. not made in

Loud speakers
Energy meters
None of the listed here
Transformers

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Magnetism and Electromagnetism
What is the flux density in a magnetic field in which the flux in 0.1 m2 is 600 Wb?

600 T
600 T
6,000 T
6 T

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