What Are Dc Motors?


A Direct Current (DC) motor is a motor that turns energy from a direct current and turns this into mechanical energy. The first DC motor was developed around the 1830's-1840s. They were commercially unsuccessful, because these motors were battry powered and batteries were still very expensive and the quality was low.



What are DC motors?

A Direct Current (DC) motor is a motor that turns energy from a direct current and turns this into mechanical energy. The first DC motor was developed around the 1830's-1840s. They were commercially unsuccessful, because these motors were battry powered and batteries were still very expensive and the quality was low.


What are the 10 rights of a child?

Child Rights in India - Right To Education And Health

  • Right to Survival: • Right to be born. • Right to minimum standards of food, shelter and clothing.
  • Right to Protection: • Right to be protected from all sorts of violence.
  • Right to Participation: • Right to freedom of opinion.
  • Right to Development: • Right to education.


What should be included in a online syllabus?

The syllabus should include a statement of course objectives and requirements, a description of the grading system, tentative examination schedule, as appropriate to the course, and a clear attendance policy.


What are objective types?

Simply, an objective type test is one which is free from any subjective bias either from the tester or the marker.


Why is National Science Day celebrated?

The day was first celebrated on February 28, 1987. On this day, scientist Chandrasekhara Venkata Raman discovered the Raman Effect. Raman won the Nobel Prize in 1930 for his work on 'The scattering of light and the discovery of the Raman effect. '


Why is it important to post to a blog regularly?

Blogging gives you a great opportunity to demonstrate and share your knowledge, and by blogging regularly on a small number of related topics you become known as the expert in your field. People are more likely to buy your services when you've already shown them you know what you're talking about!


Does BYJU's take money?

BYJU'S operates roughly on a premium business model where a paid subscription is required for most of the content.


What is the dimension of resistance Mcq?

∴ Dimension of resistance, R=IT=


How does the air rotate with Earth?

But because the Earth rotates, circulating air is deflected. Instead of circulating in a straight pattern, the air deflects toward the right in the Northern Hemisphere and toward the left in the Southern Hemisphere, resulting in curved paths. This deflection is called the Coriolis effect.


How many periodic tests are there in CBSE?

3 Periodic Tests


What type of test is the GMAT?

The GMAT, which stands for the graduate management admission test, is a standardized test intended to measure a test taker's aptitude in mathematics, verbal skills, and analytical writing. The GMAT is most commonly used as the primary exam reviewed by business schools to gain entrance into an MBA program.


How do you ace a science test?

10 Steps To Ace Your Next Test

  1. Get informed. Don't walk into your test unprepared for what you will face.
  2. Think like your teacher.
  3. Make your own study aids.
  4. Practice for the inevitable.
  5. Study every day.
  6. Cut out the distractions.
  7. Divide big concepts from smaller details.
  8. Don't neglect the “easy” stuff.


Is torque a vector?

Torque is a vector quantity. The direction of the torque vector depends on the direction of the force on the axis.


What is Pascal law state and prove?

Pascal's Law states that the external static pressure applied on a confined liquid is distributed or transmitted evenly throughout the liquid in all directions. Proof: Consideration: Let us suppose an incompressible liquid filled in a vessel of shape as shown in the figure.


Why is it hard to define health?

To try to define health as simply the absence of disease or infirmity leads you into difficulties: ill health can't be defined simply in terms of disease, for example, because people can have a disease (especially one with minor symptoms) without feeling ill, and they can have unwanted symptoms (nausea, faintness,


What are the application of electrochemistry?

A lot of things in sanitation use electrochemistry, too, through a process called electrolysis. Electrolysis is the practice of using electricity to start a chemical reaction. A lot of manufacturers use this process to separate brine into sodium hydroxide and chlorine.


What are the disadvantages of a batch processing system?

With batch processing, users may be forced to viewing data in both systems in order to see the most current data, resulting in losing order processing efficiency. Depending on the order flow volume throughout the workday, batch processing may create bottlenecks when transaction levels spike.


What are the 4 historical thinking concepts?

The six “historical thinking concepts” are: historical significance, primary source evidence, continuity and change, cause and consequence, historical perspectives and ethical dimensions.


What is an intelligence course?

The Intelligence Certificate provides a comprehensive study of the various issues of intelligence policy, process, epistemology, analysis, and history.


How can I get IIBF certificate?

Such candidates send an e-mail to [email protected] requesting for copy of e-certificate with subject line “Copy of e-Certificate” giving member/registration no, exam name etc. Candidate will receive duplicate certificate in e-format from the e-mail [email protected]


Dated : 05-Jul-2022

Category : Education

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