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Brushed DC motor

Friday, 24 October 2014

Five types of DC motor are :

1. Permanent magnet DC motor

2. Separately excited DC motor

3. DC shunt- wound motor

4. DC series-wound motor

5.DC compound motors ---
a. Cumulative compound.
b. Differentially compounded.

Wind Power Energy general knowledge

The Universe is unevenly heated by the sun , such that the poles receive less energy from the sun then the equator, along with this, dry land heats up or cools down even quickly than the seas do. The differential heating drives a world wide atmospheric convection system reaching from the universe surface to the startosphere which acts as a virtual ceiling. Most of the energy stored in these wind movements can be found at high aptitudes where continues wind speeds of over 160 km/h or 99 mph occur.
Basically, the wind energy is converted through friction into diffuse heat throughout the Earth's surface and the atmosphere. The total amount of economically extractable power available from the wind is considerably more than present human power use from all sources.

EEE CSE Viva MCQ Question Answers

Monday, 1 September 2014

1. Decibel is the unit of : Sound.

2. Angstrom measures : Length of Light Waves.

3. The largest plannet in the Solar system is :Jupitar.

4. The inventor of the Telephone :. Alexander Graham Bell.

5. Bluetooth is the popular name for the : Wireless networking Standard.

6. The most used Search engine  of the world is: Google.

7. E=mc`2 defines the Theory of relativity.

8. DOS : Stands for Disk Operating System.

9. Start Button was first introduced in the operating system : Windows 98.

10. The type of computers are also called midrange computers is- Mini computers.

Important Electrical Electrical Units

Wednesday, 20 August 2014

1.SI unit of megnetic flux is Weber

2. Unit of magneto motive force is Ampere-Turn

3.CGC unit of magneto motive force Gilbert

4.The unit of flux is in CGS system is Maxwell

5.Flux density is measured in Tesla

How Power Plants Work

Tuesday, 1 April 2014

How Power Plants Work

Electricity is actually the flow or movement of electrons through a material. Electric generating plants typically produce electricity using magnetic conduction. This happens when a large number of conductive wires are spun around inside a magnetic field, causing electrons to move (i.e., electricity to flow).
In a generating plant, the potential energy of various types of fuels (fossil, nuclear, or renewable) is converted into another form of energy (usually mechanical or heat energy). This energy is used to turn fan-like blades inside a turbine. These blades are attached to a pole-like shaft. When the blades inside the turbine begin to turn, the shaft begins to turn. This causes wires located inside a magnetic field within the generator to turn. The resulting flow of electrons is electricity. More or less electricity can be created by varying certain factors including: the type of materials used in the wire, the speed at which the turbine rotates, the size of the magnetic field, and the number of wire coils inside the magnetic field, among others.
Wires coming from the generator are used to conduct the flow of electricity out to a neighboring switchyard, where the electricity is “stepped up” (i.e., the voltage is raised) so that it can be sent to customers.
Steam-electric plants produce electricity by using heat energy to turn water into steam. The highly pressurized steam then travels through pipes to the blades in the turbine. When the steam hits the turbine, it causes the blades to spin.
Hydroelectric generating facilities use mechanical energy (i.e., the movement of water) to cause the blades in the turbine to turn.
In a steam-electric solar generating facility, heat from the sun’s rays is used to create the steam that is needed to rotate the turbine.


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