## Mathematics Involving in LCR Circuit

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

## 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 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 about Maxwell’s Equations) Me (Surprised): …

## Negative Feedback

An Analogy I have an obsession with throwing the ball of paper into the trash can from my working table. At my first attempt, I cannot score the ball into that trash can. After that, I can score the ball by decreasing or increasing the initial velocity if the ball lands behind or in front …

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 phenomenon called loading. 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 …

## Operational Amplifier (Op-amp)

How does op-amp work?  Op-amp is a device with two inputs, positive and negative input, denoted by the + and – signs respectively. 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 …

## 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 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 number of stuff you have to memorize becomes enormous. If you think, there …