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Magnetism and Electromagnetism

Magnetism and Electromagnetism
Two long parallel conductors carry 100 A. If the conductors are separated by 20 mm, the force per meter of length of each conductor will be

0.1 N
100 N
10 N
0.01 N

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

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

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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?

300 At
18.75 At
30 At
187 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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Magnetism and Electromagnetism
What will be the current passing through the ring shaped air cored coil when number of turns is 800 and ampere turns are 3200?

12
4
6
8

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Magnetism and Electromagnetism
How does the magnetic compass needle behave in a magnetic field?

It starts rotating
It assures a position right angle to magnetic field
None of the listed here
It assures a position which follows a line of magnetic flux

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