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The same flux passes through all the parts of circuits whose total reluctance is the sum of the reluctance of the series-connected part of the circuit, Also, the MMF is equal to the sum of all the MMFs required for the individual part. Which magnetic circuit have all these properties?
Calculate the reluctance when the magnetomotive force is 10A turns and the flux is 5Wb.
Calculate the reluctance of the material with a mmf of 3.5 units and flux of 7units.
A semiconducting crystal 12mm long, 5mm wide and 1mm thick has a magnetic flux density of 0.5Wb/m2 applied from front to back perpendicular to largest faces. When a current of 20mA flows length wise through the specimen, the voltage measured across its width is found to be 37μV. What is the Hall coefficient of this semiconductor?
What is the relation between reluctance, flux and mmf of the machine?
The reluctance offered to the stator flux by two very large air gaps in series with high permeability iron, in reluctance machine is maximum, when the space angle θr = ___________
The reluctance offered to the stator flux by two small air gaps in series with high permeability iron, in reluctance machine is minimum, when the space angle θr = ___________
From the reaction, Methane –> Carbon + 2(Hydrogen molecule) find the ratio of N Flux of A to the Total N flux( A+B); Given N Flux of B =-2 N flux of A.
Which among the following serves the two purposes i.e., 1. They support the exciting coils (or field coils) 2. They spread out the flux in the air-gap and also reduce the reluctance of the magnetic path
A 100KW, 250 V, 400 A, a long shunt compound generator has an armature resistance of 0.025 ohms. There are 1000 shunt fields turns per pole and 3 series field turns per pole. The series field is connected in a such a fashion that positive armature current produces direct-axis MMF which adds to that of the shunt field. Compute the gross MMF at the rated terminal current when shunt field current is 4.7A and speed is 1150 rpm.