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What is Static mmf?
Static magnetomotive force (MMF) refers to the magnetic potential created by a coil or winding when a steady electric current flows through it, resulting in a constant magnetic field. It is calculated as the product of the current passing through the coil and the number of turns in the coil (MMF = N * I, where N is the number of turns and I is the current). Static MMF is crucial in understanding magnetic circuits and is fundamental in the design of transformers, inductors, and other electromagnetic devices. Unlike dynamic MMF, static MMF does not account for time-varying fields or currents.
What is the reason for the distance limitation with the use of mmf?
MMF can stand for lots of things. What is MMF?
What is mmf?
Full-form Of MMF: MAGNETO MOTIVE FORCEDefinition Of MMF ( Magneto motive Force ): Just as electromotive force ( emf ) is necessary to pass current in electric circuit, magneto motive force ( mmf ) is necessary to establish flux in the magnetic circuit. Magneto motive force is the multiplication of current flowing through the coil and the number of turns of the coil.Unit of magneto motive force ( mmf ) is ampere turn.Thus, it should be understood that the magneto motive force can be increased by increasing the number of turns in the coil or by increasing the current flowing through the coil or by increasing both.CommentThe unit of measurement of magnetomotive force is actually the ampere, although it is frequently spoken as 'ampere turn' to prevent its confusion with electric current.
How is Ohm's Law for Magnetism analogous to voltage EMF?
Magnetomotive force (not 'magneticmotive force') is analogous to electromotive force, in the same way that magnetic flux is analogous to current, and reluctance is analogous to resistance. Mmf, flux, and reluctance also have the same 'Ohm's law' relationship as emf, current, and resistance. It is mmf that sets up the magnetic flux; it is the emf that sets up the current.One point worth noting is that despite mmf being measured in amperes (the product of the current flowing through a coil and the number of turns), it is still analogous to emf, and not current!
What is the amount of MMF generated by a 50-turn electromagnetic coil supplied by 12 VDC at a current of one ampere?
600 amperes.
What is the phase difference between stator mmf and rotor mmf?
The phase diference is proportional to the load
What is the difference between emf and mmf?
emf is electromotive force mmf is magnetic motive force emf drives electon where as mmf drives magnetic field
Why mmf method is called optimistic?
The mmf (Modified Monotonic Function) method is called optimistic because it assumes that future states can only improve from the current state. It optimistically selects the best possible outcome at each decision point, without considering the potential for negative changes or disruptions.
What is the unit for Magneto motive Force?
around the megnet genrated field its call magneto motive force
What is meant by maganetization current?
It is the one which is used to produce flux in transformer and main field flux in motor or generator. Flux is proportional to the current passed through the coil. Flux is inversely proportional to the reluctance of the medium that the flux passes through. Flux is analogous to current. Reluctance is analogous to resistance. MMF is analogous to voltage. so if there is a coil carrying 5A current and 10 turns it produces 5*10 = 50 Ampere Turns MMF . so as the current increases MMF increases. If reluctance of the medium used is high there will be more flux. Let us take a transformer in that in order to produce EMF in the secondary we have to give flux from the primary for that we need a current in the primary that is called Magnetizing current . Any way if we load the transformer , the transformer primary carries (N2 / N1 ) * I2 current in addition to magnetizing current. Apart from these two currents there will be another current which is responsible for core loss in the transformer. Please note that all these three currents are at different phase angles i.e. they are not in same phase. Medium for the flux in the transformer is core. If it is a iron core reluctance is more , to produce same EMF it will take more magnetizing current. If we use CRGO steel as core reluctance is less. For less magnetizing current itself we get flux for the required EMF in secondary.
What is the formula for total current in a series circuit?
Current = (Voltage across the circuit) divided by (Total resistance of the circuit). The current is the same at every point in the series circuit.
Why the current is the same in both sides of the main line that connects the voltage source to the parallel branches.?
The current in the main line is the same as the current in the parallel branches because of Kirchhoff's current law, which states that the total current entering a junction must equal the total current leaving the junction. Therefore, the current entering the parallel branches from the main line is the same as the current returning to the main line from the parallel branches.
