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Magnetism and Electromagnetism

Magnetism and Electromagnetism
A coil of wire is placed in a changing magnetic field. If the number of turns in the coil is decreased, the voltage induced across the coil will

Decrease
Be excessive
Remain Constant
Increase

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Magnetism and Electromagnetism
Which of the following is the unit of magnetic flux density?

Tesla
None of the listed here
Lumens
Weber

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

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

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

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Magnetism and Electromagnetism
If the steel disk in a crankshaft position sensor has stopped with the tab in the magnet's air gap, the induced voltage

Decrease
Is zero
Increase
None of the listed here

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

reluctance
residual magnetism
susceptance
permeance

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MORE MCQ ON Magnetism and Electromagnetism

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