How can the polarity of an electromagnet be determined if the direction of current flow is known?
Synchronous Generator
In comparison to an asynchronous generator, it is a machine where the rotor speed is equal to the rotating magnetic field produced by the stator, i.e., mechanical speed is equal to the electrical speed, thus called synchronous, and not asynchronous.
Salient Pole Rotor
Salient pole rotor includes a large number of exposed poles mounted on a magnetic wheel. The construction of a bright pole is as shown in the image on the left. The proposed poles are made of metal laminations. The rotor winding is provided on these poles and is supported by pole shoes.
Unit 13 Magnetic Induction
Unit 15 Alternating Current
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Unit 16 Inductance in AC circuits
18. How many degrees are the current and voltage out of phase with each other in a pure resistive circuit?
19. How many degrees are the current and voltage out of phase with each other in a pure inductive circuit?
20. To what is inductive reactance proportional?
21. Four inductors, each having an inductance of 0.6 H, are connected in series. What is the total inductance of the circuit?
22.Three inductors are connected in parallel. Inductor 1 has an inductance of 0.06 H; Inductor 2 has an inductance of
0.05H and Inductor 3 has an inductance of 0.1 H. What is the total inductance of this circuit?
23..An inductor is connected to a 240-V; 1000-Hz line. The circuit current is 0.6 A. What is the inductance of the inductor?
24 .An inductor with an inductance of3.6 H is connected to a 480-V; 60-Hz line. How much current will flow in
this circuit?
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