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Magnetism and Electromagnetism

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

30 At
300 At
18.75 At
187 At

ANSWER DOWNLOAD EXAMIANS APP

Magnetism and Electromagnetism
What is the mmf of a wire with 8 turns carrying three amperes of current?

24 AT
2.4 AT
0.24 AT
240 AT

ANSWER DOWNLOAD EXAMIANS APP

Magnetism and Electromagnetism
The two conductors of a transmission line carry equal current I in opposite directions. The force on each conductor is

proportional to distance between the conductors
proportional to X
proportional to 7
inversely proportional to I

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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
633.8 N/Wb
63.38 N/Wb

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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
BLI2
BLI
None of the listed here

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

ANSWER DOWNLOAD EXAMIANS APP
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