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Define Magnetic field
The area around a magnet is known as the magnetic field and it is in this area that the effects of the magnetic force formed by the magnet can be detected. A magnetic field cannot be seen, felt, smelt or heard and thus is difficult to represent. Michael Faraday suggested that the magnetic field could be shown pictorially, by imagining the field to having of lines of magnetic flux, which enables investigation of the distribution and density of the field to be carried out
Q. For themagnetic circuit shown in Figure, neglecting leakage and fringing, determine the mmf of the exciting coil required to produce a flux density of 1.6 T in the air gap. Them
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Ask qu1. If the resistor Radj is adjusted to 175O what is the rotational speed of the motor at no-load conditions? 2. Assuming no armature reaction, what is the speed of the motor
Equivalent Circuit of a DC Machine A review of the material presented with regard to elementary direct-current machines can be helpful at this stage to recall the principles of
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