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Magnetism and Electromagnetism

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?

300 AT
30 AT
0.3 AT
3 AT

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Magnetism and Electromagnetism
The change of cross-sectional area of conductor in magnetic field will affect

both of the listed here
reluctance of conductor
resistance of conductor
None of these

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Magnetism and Electromagnetism
The uniform magnetic field is

The field in which all lines of magnetic flux are parallel and equidistant
The field of a single conductor
The field of a set of parallel conductors
None of the listed here

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

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

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

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

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Magnetism and Electromagnetism
What is the magnitude and the direction of force per 1.1m length of a pair of conductors of a direct current linecarrying 10 amperes and spaced 100 mm apart ?

22 x 10"7 N
22 x 10"5 N
22 x 10-6 N
22 x 10"8 N

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