Correct Answer - Option 4 : 2500 AT
Magnetomotive force (MMF):
The current flowing in an electric circuit is due to the existence of electromotive force similarly magnetomotive force (MMF) is required to drive the magnetic flux in the magnetic circuit. The magnetic pressure, which sets up the magnetic flux in a magnetic circuit is called Magnetomotive Force.
The strength of MMF is equal to the product of the current and no. of turns of the coil
MMF can be expressed as
MMF = N I = (Flux) x (Reluctance)
The SI unit of MMF is ampere-turn (AT)
Calculation:
Given, N = 250 turns, I = 10 A
MMF = N × I = 250 × 10
MMF = 2500 AT
