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Magnetism and Electromagnetism

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

300 At
18.75 At
30 At
187 At

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

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Magnetism and Electromagnetism
Which of the following is not a unit of flux?

All of the listed here
Tesla
Maxwell
Weber

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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?

300 AT
3 AT
0.3 AT
30 AT

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Magnetism and Electromagnetism
The materials are a bit inferior conductors of magnetic flux than air.

Ferromagnetic
Dielectric
Diamagnetic
None of the listed here

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Magnetism and Electromagnetism
The most effective and quickest may of making a magnet from soft iron is by

The use of permanent magnet
Induction
Placing it inside a coil carrying current
Rubbing with another magnet

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