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Magnetism and Electromagnetism

Magnetism and Electromagnetism
Magnetism of a magnet can be destroyed by

Heating
By inductive action of another magnet
Hammering
All of the listed here

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Magnetism and Electromagnetism
What is the magnetomotive force in a 75-turn coil of wire when there are 4 A of current through it?

300 At
18.75 At
30 At
187 At

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Magnetism and Electromagnetism
Fleming's left hand rule is used to find

Direction of flux in a solenoid
Polarity of a magnetic pole
Direction of magnetic field due to current carrying conductor
Direction of force on a current carrying conductor in a magnetic field

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

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

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Magnetism and Electromagnetism
Which of the following is not a unit of flux?

Tesla
Weber
Maxwell
All of the listed here

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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?

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

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MORE MCQ ON Magnetism and Electromagnetism

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