Electric current collectors

What are current collectors? Current collectors are components fitted to an electric equipment in motion to collect electric current required for its operation from a stationary busbar. They can be…

Interview questions on PLC (Programmable Logic Controllers)

Here are the most frequently asked Interview questions on PLC. This article aims to cover most of the interview questions on programmable logic controllers so as to prepare you to…

Interview question – Induction Motors

Here are the most frequently asked questions on Induction motors. This article aims to cover most of the interview questions on induction motors so as to prepare you to crack…

Difference between Transistors and Thyristors

Transistors and thyristors are semiconductors switching devices. They are used for controlling current flow in circuits. They play a very important role in all power conversion devices. In this article…

The difference between kVA and kVAR

The difference between kVA and kVAR is pretty simple. "kVA" is the unit of apparent power whereas "kVAR" is the unit of reactive power. Before getting into the topic, we…

Drawout circuit breaker positions and indications explained

Several operating indications can be seen on the front of an ACB or MCCB. Being an electrician or an engineer it is important that one must understand those indication and…

What is PIV rating in a diode?

PIV stands for 'Peak Inverse Voltage'. It refers to the maximum reverse bias voltage a semiconductor diode or other semiconductor devices can withstand without damaging themselves. The peak inverse voltage…

Difference between resistance and impedance

When we speak about DC electricity, resistance is the term used to refer to opposition to current flow whereas impedance is the term used in AC electricity. Impedance is basically…

Difference between EMF and Voltage

The difference between EMF and voltage is that the EMF is the potential difference measured across a power source without load connected to it whereas voltage is the potential difference…

Difference between volts and amps | Volts vs amps

Volts and amps or ampere are two measures of electricity. Specifically, voltage is the measure of electric potential difference between two points whereas ampere is the measure of electric current.…