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Magnetism and Electromagnetism

Magnetism and Electromagnetism
The attraction capacity of electromagnet will increase if the

Core length increases
Core area increases
Flux density increases
Flux density decreases

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Magnetism and Electromagnetism
What is the magnetomotive force in a 75-turn coil of wire when there are 4 A of current through it?

30 At
187 At
300 At
18.75 At

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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
One telsa is equal to

1 Wb/mm²
1 Wb/m²
1 mWb/m²
1 Wb/m

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

Ebolite
Brass
Copper
Zinc

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Magnetism and Electromagnetism
The direction of magnetic lines of force is

From north pole to south pole
From one end of the magnet to another
From south pole to north pole
None of the listed here

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MORE MCQ ON Magnetism and Electromagnetism

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