Calculation of Current through a Diode

Current through an Ideal Diode: The diode equation gives an expression for the current through a diode as a function of voltage. The Ideal Diode Law, expressed as shown below   Where, I = the net current flowing through the diode I0 = Reverse Saturation Current V = applied voltage across the terminals of the … Read more

How are Overhead Line Insulators Cleaned?

Cleaning of overhead transmission line is not required because any dust and dirt that falls out of the sky onto them will be limited thickness and will not affect the electricity flow in any way nor will it decrease clearance (which is the insulation) in any meaningful way. Thus it is not necessary to clean … Read more

Why do Capacitor Block DC but Allows AC

All of us know that a Capacitor do not allow DC current to pass through it but allows AC current. In this post we will discuss this kind of behavior of Capacitor.First we will consider DC supply connected to a parallel plate capacitor as shown in figure below. Let the capacitance be C. So as … Read more

Calculation of Reactive Power of a Capacitor

This post gives is a quick derivation of the formula for calculating the steady state reactive power absorbed by a capacitor when excited by a sinusoidal voltage source. Given a capacitor with a capacitance value of C in Farads, excited by a voltage source V in volts, it will draw a current i amps into … Read more

How to Prepare for Mathematics for GATE-2018

Mathematics is an important subject for securing a good rank in GATE exam. If you see the statistics, you will note that every year around five questions are asked form Mathematics. Marks wise it will stand around 12. So once can secure his/her 12 marks by just preparing Mathematics. There are three sections where math … Read more