9 December 2019

Advantages & Disadvantages of Integrated Circuits


Integrated Circuit
  • It is a circuit in which transistor, resistors, capacitors, diodes etc. are fabricated in a single small chip.

Advantages of Integrated Circuits
  • Less weight

8 December 2019

Comparison Between Frequency Modulation ( FM ) and Amplitude Modulation ( AM )


Amplitude Modulation
  • When the amplitude of the carrier wave is changed according to intensity of signal, it is called as amplitude modulation.
  • Amplitude of carrier wave changes with modulation

7 December 2019

Electrical Wiring Important Defination


Appliance
  • It is an energy consuming device or equipment.

Light electrical Appliances
  • It is electrical appliances whose power rating less than 5.0 kW.

3 December 2019

Calculation of Earth Fault Current


The magnitude of earth fault current in the line to earth fault on an earthed system is determined by 
  • Impedance from source to fault
  • Impedance of earth return paths

27 October 2019

Capacitor ( Function of capacitor )

  • The capacitor is defined as the conducting plates separated by dielectric material. 
  • The function of capacitor is to store electricity in which excess electrons on one plate and deficit electrons on other plate. 

Capacitors in Series and Parallel

Capacitor in series

  • If the positive plate of one capacitor is connected to negative plate of another capacitor , it is called as series connection of capacitors. 
  • If there are three capacitors connected across direct supply voltage V,

26 October 2019

Why Crushed Rock is used at the earth surface in the substation?

  • We always see crushed rock spread on the surface of soil in the substation. 
  • The resistivity of gravel is approximately 2000 ohm – meter whereas the soil resistivity is only 100 ohm – meter. 
  • We say that the resistivity of gravel is 20 times than that of soil.