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Magnetism and Electromagnetism

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
8
6
4

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Magnetism and Electromagnetism
A conductor of length L has current I passing through it, when it is placed parallel to a magnetic field. The force experienced by the conductor will be

None of the listed here
BLI2
Zero
BLI

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Magnetism and Electromagnetism
The direction of a magnetic field within a magnet is

back to front
front to back
from north to south
from south to north

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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
0.3 AT
30 AT
3 AT

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Magnetism and Electromagnetism
The unit for permeability is

At/m
Wb/At × m
At/Wb
Wb

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Magnetism and Electromagnetism
When two ends of a circular uniform wire are joined to the terminals of a battery, the field at the center of the circle

will be infinite
will be zero
will depend on the radius of the circle
will depend on the amount of e.m.f. applied

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