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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?

0.3 AT
300 AT
3 AT
30 AT

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Magnetism and Electromagnetism
A 300 mm long conductor is carrying a current of 10 A and is situated at right angles to a magnetic field having a flux density of 0.8 T ; the force on the conductor will be

24 N
2.4 N
0.24 N
240 N

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Magnetism and Electromagnetism
Fleming's left hand rule is used to find

Direction of magnetic field due to current carrying conductor
Direction of force on a current carrying conductor in a magnetic field
Direction of flux in a solenoid
Polarity of a magnetic pole

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Magnetism and Electromagnetism
The unit for reluctance is

At/m
tesla
Wb
At/Wb

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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
150 At
100 At
200 At

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

Copper
Ebolite
Brass
Zinc

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