Electricity Concepts

How does a resistive voltage divider work?

Introduction A resistive voltage divider is an arrangement of two resistances in series that allows us to have at the midpoint a fraction of the voltage at the ends. Applications of a resistive divider The divider with potentiometer is usually used as an analog input in the frequency driver of the motors. Using the potentiometer …

Parallel Resistors Calculations

Introduction In this article we will deduce how to calculate the resulting resistive value by placing resistors in parallel, i.e. connecting two or more resistors with their interconnected legs. In addition we will use LT Spice to verify these results. See also calculations with resistances in series Analyzing figure 1 we can see that the …

Series Resistance Calculations

Introduction In this article we will deduce how to calculate the resulting resistive value by placing resistances in series, i.e. connecting two or more chained resistances. We will also use LT Spice to verify these results. See also calculations with parallel resistances If we think about the physical size of the resistors we realize what …

What is electrical resistance? – Simple circuits

Introduction In this article we will see the concept of electrical resistance, resistive elements and we will analyze a simple circuit to see the effect it has on the current. What is electrical resistance? It is a property of matter that indicates the difficulty that the electric current has in crossing it. There are materials …

What is electricity? – Concept of electric charge

Introduction Electricity is so present in our daily lives that we often forget its importance until suddenly a blackout occurs. In this article we will look at the concept of electricity, its application in the home and industry. We are also going to delve into the nature of matter in order to understand where electricity …