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Magnetism and Electromagnetism

Magnetism and Electromagnetism
The Biotsavart's law is a general modification of

Kirchhoff's law
Faraday's laws
Lenz's law
Ampere's law

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

150 At
100 At
200 At
300 At

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Magnetism and Electromagnetism
A permeable substance is one

through which the magnetic lines of force can pass very easily
which is a strong magnet
which is a bad conductor
which is a good conductor

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Magnetism and Electromagnetism
Ferrites are a sub-group of

Ferro magnetic material
Ferri-magnetic material
Paramagnetic material
Non-magnetic materials

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Magnetism and Electromagnetism
What is the reluctance of a material that has a length of 0.07 m, a cross-sectional area of 0.014 m2, and a permeability of 4,500 Wb/At × m?

1111 At/Wb
1 At/Wb
11 At/Wb
111 At/Wb

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Magnetism and Electromagnetism
The commonly used material for shielding or screening magnetism is

Aluminium
Copper
Soft iron
Brass

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MORE MCQ ON Magnetism and Electromagnetism

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