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

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Magnetism and Electromagnetism
The magnetomotive force is

The passage of magnetic field through an exciting coil
The flow of an electric current
The sum of all currents embraced by one line of magnetic field
The voltage across the two ends of exciting coil

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