Advertisements
Advertisements
Question
List out the advantages of stationary armature-rotating field system of AC generator.
Solution
- The current is drawn directly from fixed terminals on the stator without the use of brush contacts.
- The insulation of stationary armature winding is easier.
- The number of sliding contacts (slip rings) is reduced. Moreover, the sliding contacts are used for low-voltage DC Source.
- Armature windings can be constructed more rigidly to prevent deformation due to any mechanical stress.
APPEARS IN
RELATED QUESTIONS
Suppose the loop is stationary but the current feeding the electromagnet that produces the magnetic field is gradually reduced so that the field decreases from its initial value of 0.3 T at the rate of 0.02 T s−1. If the cut is joined and the loop has a resistance of 1.6 Ω how much power is dissipated by the loop as heat? What is the source of this power?
Draw a labelled diagram of an ac generator.
State the principle on which the AC generator works. Draw a labelled diagram and explain its working.
State A.C. generator underlying principle?
`20/pi^2`H inductor is connected to a capacitor of capacitance C. The value of C in order to impart maximum power at 50 Hz is
In an A.C. circuit, the peak value of voltage is 320 volt. Its effective voltage is ______
In an A.C circuit, the current
The average value of alternating current over a full cycle is always ______. [I0 = Peak value of current]
State the basic principle behind the working of an ac generator.
With the help of a labelled diagram, describe the principle and working of an ac generator. Hence, obtain an expression for the instantaneous value of the emf generated.
