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Magnetism and Electromagnetism

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
What is the magnitude and the direction of force per 1.1m length of a pair of conductors of a direct current linecarrying 10 amperes and spaced 100 mm apart ?

22 x 10-6 N
22 x 10"7 N
22 x 10"5 N
22 x 10"8 N

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

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

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Magnetism and Electromagnetism
A square cross-sectional magnet has a pole strength of 1 x 10 Wb and cross sectional area of 20 mm x 20 mm. What is the strength at a distance of 100 mm from the unit pole in air ?

63380 N/Wb
6338 N/Wb
63.38 N/Wb
633.8 N/Wb

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

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

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Magnetism and Electromagnetism
The attraction capacity of electromagnet will increase if the

Flux density decreases
Flux density increases
Core length increases
Core area increases

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MORE MCQ ON Magnetism and Electromagnetism

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