Md Nazmul Islam

Have you ever wondered what causes power to go out for a few seconds? There is a saying that, good with good and bad with bad. Electricity maintains this law. This electricity for the welfare of the people but if you can't control this electricity tragedy can be...

More or less every electrical engineer bears a question in mind that, why is the AC signal frequency always 50/60 Hz? Why not use other values? Europe, Africa, Asia all produce this same amount of AC signal frequency. So, let us discuss this topic today. But, before that get...

Once, I was walking down the road. There I saw some people establishing a new transformer. I became curious and went towards it to see how it is done. Then, I took a look at the plate. I saw something written like Dny11 on its body. Then, I wondered,...

The Economic Choice of Transmission Voltage - One day, I was teaching about transmission lines in a class. Then a student asked me a question, "Sir, how does the PGCB (Power Grid Company of Bangladesh) fix the transmission voltage as 132, 230, or 400 KiloVolt?" The question was logical....

AC-DC and Filament of an electric bulb | A love Story - Ever thought about, AC-DC and Filament of an electric bulb. Why can't DC be used instead of AC? Let's learn from a love story, shall we? It’s raining outside. The atmosphere is gloomy. Holding a cup of hot...

Why stones are used in Substation instead of Sand or Grass? Ever thought, why stones are used in substation instead of sand or grass? The reason is simple. But, can't be explained easily. What comes to mind when we hear about substations? Transformer, circuit breaker, lightning arrester, etc devices come...

What does mAh mean in a battery - What do we mean by the mAh rating? Especially, in the case of mobile batteries, what does it stand for? Today, I will discuss a very exciting topic with you all. At the age of 4G, there is hardly any person without...

Conventional current flows from positive to negative; electrons flow from negative to positive. Why the two directions are opposite and which one to use.

Common misconceptions about Electricity and the solution to it - let's find out. Electricity is a part and parcel of our daily lives. We can not go a single day without it. During the summer times, we can not stay for a single while without fans and air conditioners....

Substation Synchronizing System - We all are familiar with the term Substation Synchronizing System. Today, I will try to explain it more elaborately. First, let us learn about substation synchronization. Substation Synchronizing System: The lexical meaning of synchronization is rhythm or consistency. In other words, synchronization is the process...

Optical Ground Wire: Transmission Line is not unknown to us. While travelling on a train, on a highway or even by river, these transmission lines can be seen. Moreover, students of Electrical Engineering can never overlook it. You must have noticed a very thin wire on the apex of the...

What are the causes of Load shedding? How it differs from the conventional concept. The truth behind load shedding. What are the causes of Load shedding? Is a power outage called load shedding? Load Shedding: A concept remains in general people's mind that power outage is load shedding. What is the reality behind...