1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Romashka-Z-Leto [24]
4 years ago
10

a) Give a brief description of the type of DC motor that operates with its field windings running in Series with the armature an

d list two (2) of its features.
Engineering
1 answer:
astraxan [27]4 years ago
5 0

Answer:

The answer to the question is:

Explanation:

The series motor or series excitation motors, is a type of direct current electric motor in which the armature and the inductor or excitation winding are connected in series. The applied voltage is constant, while the excitation field increases with the load, since the current is the same excitation current. The flow increases in proportion to the current in the armor, as the flow grows with the load, the velocity drops as that load increases.

The main features of this engine are:

- It is packed when it is idle, because the speed of a direct current motor increases as the inductor flow decreases and, in the series motor, this decreases with increasing speed, since the intensity in the inductor is the same as in the induced.

- The power is almost constant at any speed.

- The abrupt variations in the supply voltage affect it little, since an increase in this causes an increase in the intensity and, therefore, in the flow and the counter-electromotive force, stabilizing the absorbed intensity.

You might be interested in
A 75- kw, 3-, Y- connected, 50-Hz 440- V cylindrical synchronous motor operates at rated condition with 0.8 p.f leading. the mot
Thepotemich [5.8K]

78950W the answer

Explanation:

A 75- kw, 3-, Y- connected, 50-Hz 440- V cylindrical synchronous motor operates at rated condition with 0.8 p.f leading. the motor efficiency excluding field and stator losses, is 95%and X=2.5ohms. calculate the mechanical power developed, the Armature current, back e.m.f, power angle and maximum or pull out torque of the motor

A 75- kw, 3-, Y- connected, 50-Hz 440- V cylindrical synchronous motor operates at rated condition with 0.8 p.f leading. the motor efficiency excluding field and stator losses, is 95%and X=2.5ohms. calculate the mechanical power developed, the Armature current, back e.m.f, power angle and maximum or pull out torque of the motor

5 0
3 years ago
A geothermal heat pump absorbs 15 KJ/s of heat from the Earth 15 m below a house. This heat pump uses a 7.45 kJ/s compressor.
Anna007 [38]

Answer:

COP of the heat pump is 3.013

OP of the cycle is  1.124

Explanation:

W = Q₂ - Q₁

Given

a)

Q₂ = Q₁ + W

     = 15 + 7.45

     = 22.45 kw

COP = Q₂ / W = 22.45 / 7.45 = 3.013

b)

Q₂ = 15 x 1.055 = 15.825 kw

therefore,

Q₁ = Q₂ - W

Q₁ = 15.825 - 7.45 = 8.375

∴ COP = Q₁ / W = 8.375 / 7.45 = 1.124

4 0
4 years ago
Read 2 more answers
Define the word vision statement​
Elena L [17]

Answer:

A vision statement describes what a company desires to achieve in the long-run, generally in a time frame of five to ten years, or sometimes even longer. It depicts a vision of what the company will look like in the future and sets a defined direction for the planning and execution of corporate-level strategies.

Explanation:

While companies should not be too ambitious in defining their long-term goals, it is critical to set a bigger and further target in a vision statement that communicates a company’s aspirations and motivates the audience. Below are the main elements of an effective vision statement:

-Forward-looking

-Motivating and inspirational

-Reflective of a company’s culture and core values

-Aimed at bringing benefits and improvements to the organization in the future

-Defines a company’s reason for existence and where it is heading

7 0
3 years ago
__________ affect(s) the amount of air conditioning required.
Grace [21]

Answer:

Option D

All the above

Explanation:

Depending with the number of occupants in a building, the number of air conditioners required can either be increased or reduced. For instance, if the building is to be a classroom of over 50 students, 1 air-conditioner can't serve effectively. Similarly, the activity of occupants also dictate the amount of air conditioners required since if it's a gym room where occupants exercise often then the air conditioners required is different from if the room was to serve as a  lounge. The appliances that also operate in a room require that air conditioners be installed as per the heat that may be generated by the appliances.

5 0
4 years ago
6. What types of injuries can occur in an electronics lab and how can they be prevented?
marysya [2.9K]

Answer:

The most common injuries in a chemistry lab is making a fire, heat burns, chemical burns, cuts and scrapes, contamination, inhalation, and spills and breaks.

1.) You can prevent making a fire by making sure you close and seal flammable materials.

2.) You can prevent heat burns by teaching the students how to properly use tongs,water baths, and other cooling equipment. 

3.) You can prevent chemical burns by treating the chemicals with caution, measure carefully, and use the approved containers.

4.) You can prevent cuts and scrapes by telling the students how to use the blades safely, and also when they are disposing broken or sharp items they should know how to wrap them up so no one else will get hurt. 

5.) You can prevent contamination by washing your hands, protect their clothing and skin with a lab coat or a lab apron, gloves and glasses, and cleaning your area where the germs of the chemicals were so no one will become.

6.) You can prevent inhalation by opening up windows, using ventilation fans, and using an equipment that measures the amount of gas emission in a room.

7.) Finally, you can prevent spills and breaks by telling the students what will happen if anything spills, and tell them to clean up.  

8 0
4 years ago
Other questions:
  • A series R-L circuit is given. Circuit is connected to an AC voltage generator. a) Derive equations for magnitude and phase of c
    13·1 answer
  • Air enters a well-insulated turbine operating at steady, state with negligible velocity at 4 MPa, 300°C. The air expands to an e
    10·1 answer
  • If a machine uses LESS effort to overcome a given resistance force (if Fe is less than FR), it has an actual mechanical advantag
    13·1 answer
  • assume a five layer network model. There are 700 bytes of application data. There is a 20 bye header at the transport layer, a 2
    5·1 answer
  • Convert 25 mm into in.
    13·1 answer
  • one number is 11 more than another number. find the two number if three times the larger number exceeds four times the smaller n
    14·1 answer
  • What is the normal balance side of an asset?
    9·1 answer
  • What is the answer???
    10·1 answer
  • Water flow enters a pipe at a velocity of 1m/s. The pipe inlet is 10cm. The pipe outlet is 6cm. 1. Determine the velocity of the
    9·1 answer
  • What is the name of this piece?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!