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Magnetism and Electromagnetism

Magnetism and Electromagnetism
The induced voltage across a stationary conductor in a stationary magnetic field is

zero
decreased
increased
reversed in polarity

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Magnetism and Electromagnetism
The unit for reluctance is

At/m
At/Wb
Wb
tesla

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

Diamagnetic
Ferromagnetic
Dielectric
None of the listed here

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Magnetism and Electromagnetism
The induced voltage across a coil with 250 turns that is located in a magnetic field that is changing at a rate of 8 Wb/s is

31.25 V
3,125 V
2,000 V
1,000 V

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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

increases
remains unchanged
reverses polarity
decreases

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Magnetism and Electromagnetism
There is 900 mA of current through a wire with 40 turns. What is the reluctance of the circuit if the flux is 400 Wb?

9,000 At/Wb
14,400 At/Wb
1,440 At/Wb
90,000 At/Wb

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MORE MCQ ON Magnetism and Electromagnetism

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