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Magnetism and Electromagnetism

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

Zero
BLI
BLI2
None of the listed here

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Magnetism and Electromagnetism
A basic one-loop dc generator is rotated at 90 rev/s. How many times each second does the dc output voltage peak (reach maximum)?

90
360
180
270

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Magnetism and Electromagnetism
If a loop in a basic dc generator suddenly begins rotating at a faster speed, the induced voltage

remains unchanged
increases
reverses polarity
decreases

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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

Increase
Is zero
None of the listed here
Decrease

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Magnetism and Electromagnetism
Core of an electromagnet should have

Both low coercivity and high susceptibility
None of the listed here
Low coercivity
High susceptibility

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Magnetism and Electromagnetism
The main constituent of permalloy is

Cobalt
Tungsten
Chromium
Nickel

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MORE MCQ ON Magnetism and Electromagnetism

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