Questions – Answers

Electrical and Electronics Engineering Interview Questions and Answers

Difference Between Relay and Circuit Breaker

Main Differences between Circuit Breaker and Relay A Relay is a switch used as sensing and controlling device which makes and closes the contacts electronically or electromechanically. Relay is also…
Read More »

Main Difference Between Contactor and Starter

Difference Between Contactor and Motor Starter The magnetic starter is very similar to the magnetic contactor in both design and operation. Both devices operate by activating contacts when the coil…
Read More »
Main Difference between Fuse and Circuit Breaker

What is the Difference between Fuse and Circuit Breaker A fuse is a device, which is used to protect circuits from over current, overload and make sure the protection of the circuit. It…
Read More »

Difference Between MCB, MCCB, ELCB, RCD (RCCB) and RCBO Circuit Breakers

Main Difference Between MCB, MCCB, ELCB, RCCB (RCD or RCB) and RCBO Circuit Breakers Different types of circuit breakers are installed and used for safety purposes in both residential as well…
Read More »
What is Inductor – Its Working, Parameters, Factors & Applications

Inductor and its Working, Parameters, Factors and Applications An inductor is one of the most used electrical components in a circuit. It is referred by many names such as choke,…
Read More »
Analysis of a Simple R-L Circuit with AC and DC Supply

Analysis of a Simple R-L Circuit and Inductor Behavior Analysis of a Simple R-L Circuit with DC Supply: The circuit shown in Figures-1 is a simple R-L circuit (it has…
Read More »
Why Don’t Birds and Squirrels Get Electrocuted on Power Lines?

Why Don’t Birds Setting on Power Lines Get Electrocuted? We mentioned many times that electricity is our best friend as well as a worst enemy. If you give it a…
Read More »

Why is Electric Power Transmission Multiple of 11 i.e 11kV, 22kV, 66kV etc?

Why are all the Transmission Line Voltages Multiple of 11kv? Not 10kV? Obliviously, this is an interview type question for electrical engineers especially related to power engineering. Now, we are…
Read More »
Why is Earth Pin Thicker and Longer in a 3-Pin Plug?

Why is Earth Pin Longer and Larger in a 3-Pin Plugs? We know that electricity is our best friend as well as the worst enemy because if you give it…
Read More »
What Are the Colored Aerial Marker Balls on Power Lines For?

What Are Marker Balls and Why Are They Used on Power Lines? Almost all of us have seen colored balls (usually orange, yellow, red, or white) on transmission and distribution…
Read More »