This topic contains a solution. Click here to go to the answer

Author Question: In a synchronous AC motor, the speed of the motor is controlled by changing the ________ in the ... (Read 57 times)

colton

  • Hero Member
  • *****
  • Posts: 627
In a synchronous AC motor, the speed of the motor is controlled by changing the ________ in the stator.
 
  A) Pulse width B) Voltage C) Frequency D) Temperature

Question 2

A PTC circuit protector prevents excessive current flow in a circuit by __________.
 
  A) Grounding the current B) Changing to a very high resistance
  C) Opening a set of contacts D) Burning open



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

strudel15

  • Sr. Member
  • ****
  • Posts: 324
Answer to Question 1

C

Answer to Question 2

B




colton

  • Member
  • Posts: 627
Reply 2 on: Jun 23, 2018
Wow, this really help


kalskdjl1212

  • Member
  • Posts: 353
Reply 3 on: Yesterday
Gracias!

 

Did you know?

A cataract is a clouding of the eyes' natural lens. As we age, some clouding of the lens may occur. The first sign of a cataract is usually blurry vision. Although glasses and other visual aids may at first help a person with cataracts, surgery may become inevitable. Cataract surgery is very successful in restoring vision, and it is the most frequently performed surgery in the United States.

Did you know?

Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.

Did you know?

Every flu season is different, and even healthy people can get extremely sick from the flu, as well as spread it to others. The flu season can begin as early as October and last as late as May. Every person over six months of age should get an annual flu vaccine. The vaccine cannot cause you to get influenza, but in some seasons, may not be completely able to prevent you from acquiring influenza due to changes in causative viruses. The viruses in the flu shot are killed—there is no way they can give you the flu. Minor side effects include soreness, redness, or swelling where the shot was given. It is possible to develop a slight fever, and body aches, but these are simply signs that the body is responding to the vaccine and making itself ready to fight off the influenza virus should you come in contact with it.

Did you know?

It is difficult to obtain enough calcium without consuming milk or other dairy foods.

Did you know?

Hippocrates noted that blood separates into four differently colored liquids when removed from the body and examined: a pure red liquid mixed with white liquid material with a yellow-colored froth at the top and a black substance that settles underneath; he named these the four humors (for blood, phlegm, yellow bile, and black bile).

For a complete list of videos, visit our video library