AC motors and generators. Exercise 2.

Поставьте следующие предложения в вопросительной и отрицательной формах:

  1. Alternating current is advantageous for electric power transmission.
  2. Most large electric generators are of the AC type.
  3. Alternators driven by high-speed turbines are often two-pole machines.
  4. It is often desirable to generate as high a voltage as possible.
  5. The armature of AC generators is composed of two windings.
  6. A larger number of phases may be obtained by increasing the number of windings in the armature.
  7. Modern electrical-engineering practice three-phase alternating current.
  8. Three-phase alternator is the dynamoelectric machine used for the generation of electric power.