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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?

8
4
6
12

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Magnetism and Electromagnetism
Magnetising steel is normals difficult because

it has high permeability
it corrodes easily
it has high specific gravity
it has low permeability

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Magnetism and Electromagnetism
The stray line of magnetic flux is defined as

A line of magnetic flux in a non-uniform field
The mean length of a ring shaped coil
A line of magnetic flux which does not follow the designed path
A line vertical to the flux lines

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Magnetism and Electromagnetism
The use of permanent magnets is. not made in

Loud speakers
None of the listed here
Transformers
Energy meters

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Magnetism and Electromagnetism
The magnetism left in the iron after exciting field has been removed is known as

susceptance
permeance
residual magnetism
reluctance

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Magnetism and Electromagnetism
An electromagnetic field exists only when there is

decreasing current
voltage
an increasing current
current

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MORE MCQ ON Magnetism and Electromagnetism

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