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Downloads Principle of Electronics Book

Sunday, 7 December 2014

Free Electrical And Electronics And Telecommunication Books Downloads
Downloads Principle of Electronics
By
V.K MEHTA
ROHIT MEHTA

S. CHAND Production


Downloads Click..

Happy Engineering.... :)

Electrical and Electronics Dictionary

Tuesday, 25 November 2014



 Electrical and Electronics Dictionary

Electric Network: The electrical components(resister,capacitor,inductor and supply sources) is connected in circuit in whatever i.e. series or parallel is called electrical network.

Complex Network:  It is those circuits which consists of many parameters (resister,capacitor etc) and these parameters are connected in such a manner that don’t solve easily by ohm law. When use ohm’s law for the solution of circuit so it’s required a lot of equation so we solve these circuits by different theorems. These circuits may be AC or DC.

Circuit: Circuit is a close conducting which allows current to pass or intending to pass pitch the circuit.

Open Circuit: Such circuits which not complete the path and its external resistance in infinite and zero current.

Short Circuit: Such circuit which provide shortest path to complete the circuit (before the load).  It’s resistance is zero and current is infinite.

Parameters  or Constant: The different element from which an electric  circuit are making is parameters or constant. i.e. resistance, inductance and capacitance.

Linear Circuit: Such circuit whose parameters do not change and remain constant with voltage or current is called linear circuit.

Non Linear Circuit: Such circuit whose parameters are change with voltage or current and do not remain constant is called non-linear circuit.

Unilateral Circuit: This is those circuit to which we apply the supply from only one side or they pass current from one side and from the other side they just behave like open circuit. i.e. diode, which is normally  used for rectification(conversion from AC to DC) process.

Bilateral Circuit: This is that type of circuit which pass the current from both side, OR they work in proper way when current is applied to it. i.e. transmission line etc.

Node: Appoint in a circuit which connect two or more than two circuit elements together is called node. OR Node is a point in a circuit from which current is distributed in two or more than two paths.

Branch: The path b/w two junctions is called branch.
A close path in a circuit which do not encounter any component more than one time.

Mesh: It is a component, which do not have any loop in it. OR Mesh is a loop, which has no loop within it.

LASER-'light amplification by stimulated emission of radiation

IMEI : International Mobile Station Equipment Identity (IMEI)

There are following parts of an IMEI:
*       -           Type Approval Code (TAC): 6 decimal places, centrally assigned.
*       -           Final Assembly Code (FAC): 6 decimal places, assigned by the manufacturer.
*       -           Serial Number (SNR): 6 decimal places, assigned by the manufacturer.
*       -           Spare (SP): 1 decimal place.
                         Thus, IMEI = TAC + FAC + SNR + SP

International Mobile Subscriber Identity ( IMSI):

Mobile Subscriber ISDN Number ( MSISDN)

Mobile Station Roaming Number ( MSRN):

Time division multiple access :(TDMA)

FDMA:Frequency-division multiple access

A private automatic branch exchange :PABX
 
Quadrature Phase Shift Keying :(QPSK)

                                                                 Electrical and Electronics Device Symbol

Alternating Currents (AC) Mcq Viva questions answers-1

Friday, 7 November 2014

Alternating Currents (AC) Mcq Viva interview Short questions answers

 1. The a.c. system is preferred to d.c. system because - a.c. voltage is easily changed in magnitude

2.  In a a.c. system, we generate sine wave from because - it produces least disturbance in electrical circuits.

3. Friction-will produce A.C. voltage.

4. Electroplating - will work only D.C. voltages.

5. In a D.C circuit we consider the resistances (R) only. But in an A.C circuit in addition to resistance (R), inductance (L), and capacitance (C).


                                                   figure: AC supply Input - Output

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.

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