## What is Resistors ?

A resistor is an electronic component designed to resist the flow of electrical current in a circuit. It is used to control the amount of current flowing through a circuit or to divide the voltage in a circuit. Resistors are usually made of a material with high resistance, such as carbon, and are designed to have a specific resistance value, which is measured in ohms (Î©).

## Resistors in Series

Series Resistors are two or more resistors connected one after another, end-to-end, so that the current flows through them in a sequential manner. In this configuration, the total resistance of the circuit is the sum of the individual resistances of each resistor.

**The equation for calculating the total resistance of resistors in series is:**

**R**eq total = R1 + R2 + R3 + ... + Rn

Where

**R1, R2, R3, ..., Rn are the individual resistance values of each resistor.**

To calculate the voltage drop across each resistor in a series circuit, you can use Ohm's Law, which states that:

### V = IR

Where

**V is the voltage drop across the resistor, I is the current flowing through the resistor, and R is the resistance of the resistor.**So, the voltage drop across each resistor in a series circuit can be calculated by multiplying the current by the resistance of that particular resistor.

## Resistors in Parallel

Parallel Resistors are two or more resistors connected across each other, so that the voltage across each resistor is the same. In this configuration, the total resistance of the circuit is less than the resistance of any individual resistor.

The equation for calculating the total resistance of resistors in parallel is:

### 1/Req Total = 1/R1 + 1/R2 + 1/R3 + ... + 1/Rn

Where

**R1, R2, R3, ..., Rn are the individual resistance values of each resistor.**The total current flowing through the circuit is the sum of the current flowing through each individual resistor.

To calculate the current flowing through each resistor in a parallel circuit, you can use Ohm's Law, which states that:

### I = V/R

Where

**I is the current flowing through the resistor, V is the voltage across the resistor, and R is the resistance of the resistor.**So, the current flowing through each resistor in a parallel circuit can be calculated by dividing the voltage by the resistance of that particular resistor.