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Magnetism and Electromagnetism

Magnetism and Electromagnetism
An electromagnetic field exists only when there is

an increasing current
current
voltage
decreasing current

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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

Is zero
None of the listed here
Decrease
Increase

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Magnetism and Electromagnetism
The materials are a bit inferior conductors of magnetic flux than air.

Dielectric
Ferromagnetic
Diamagnetic
None of the listed here

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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
The change of cross-sectional area of conductor in magnetic field will affect

both of the listed here
resistance of conductor
reluctance of conductor
None of these

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Magnetism and Electromagnetism
The main constituent of permalloy is

Cobalt
Chromium
Nickel
Tungsten

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MORE MCQ ON Magnetism and Electromagnetism

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