The magneto-motive force is______________?
Correct answer: C. the sum of all currents embraced by one line of magnetic field
- A. the voltage across the two ends of exciting coil
- B. the flow of an electric current
- C. the sum of all currents embraced by one line of magnetic field
- D. the passage of magnetic field through an exciting coil
Explanation
By Ampere's circuital law, magnetomotive force around a magnetic path equals the algebraic sum of currents enclosed by that path, expressed in ampere-turns. For a coil this is also commonly written as NI.
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