## What is the square root of 123423?

Let’s assume, just for laughs, that you are in the middle of the woods with no Internet-capable device or calculator in sight. You only have a log table. You must find the square root of  123423, or that fierce tiger will eat you whole. I am going to teach you to get rid of this …

## Mathematics Involving in LCR Circuit

I will first review the mathematical topic of Complex Numbers, and then use the concept of the complex number to solve the differential equation involving the RLC circuit. Review of Complex Number Generally, we write complex numbers as . We, electrical engineers, had already used the symbol I for current, so we used to represent …

## From Maxwell’s Equations to Electrical Engineering

When I was taking a trip down memory lane, I recalled a conversation with one of my friends which goes like this: He: Why do they have to teach the courses that I will never use in my life? Me: Courses like? He: Electromagnetics. (Electromagnetics is a course where we study Maxwell’s Equations.) Me (Surprised): …

## Negative Feedback

An Analogy I am obsessed with throwing the paper ball into the trash can from my working table. I could not score the ball into that trash can on my first attempt. After that, I can score the ball by decreasing or increasing the initial velocity if the ball lands behind or in front of …

I have mentioned the word Loading, frequently in my posts. In the post- voltage divider, I bring up that the passive filters are subjected to the loading phenomenon. Since I have not explained this term, though I am using it frequently, it needs explanation. Loading is not to load rounds in the magazine. We do …

## Operational Amplifier (Op-amp)

How does op-amp work?  Op-amp is a device with positive and negative inputs, denoted by the + and – signs. The inputs are high impedance. As a result, it doesn’t cause loading. There is one output, which is low impedance.   You are used to seeing Figure 1. You do not see Figure 2 often. …

## Can we divide vector by vector?

No, we can not divide vector by vector. Here is possibly the simplest explanation. To explain this, consider the dot product of two vectors and which gives the scalar . Here doesn’t equal to , and is an unknown vector. Considering division as the inverse of multiplication, we have to find such that it gives …

## Voltage Divider

What is the most used tool by the Electrical Engineers? Of course, memorization (Talking in the case of Nepal. I do not know about other places.). Memorization is good until you have to memorize fewer things. However, after reading a few pages, the amount of stuff you must remember becomes enormous. If you think there …