## What is Resistor?

Resistor itself says resist, an electrical component that resist or limits the flow of electric current. For more information about resistor read our blog **What is Resistor?**

## Ohm’s Law

Ohm’s law states that voltage across the ends of a conductor is directly proportional to the current flowing to the conductor where all physical conditions (Like Temperatures, Humidity, Pressure, etc) remain constant.

## V ∝ I

If we write in equation then,

## V = IR or I = V/R

Where R is the resistance of a conductor. For more information about Ohm’s law read our blog **Ohm’s Law.**

## Calculate total Current Using Ohm’s Law

In circuits where resistances are in parallel, the voltage across the each resistor is same but current is divided among it. If two resistors are connected(Fig 1) in parallel then,

#### ITotal = I1 + I2

If three resistor are connected(Fig 2) in parallel then,

#### ITotal = I1 + I2 + I3

If n no. of resistors are connected(Fig 3) in parallel then,

#### ITotal = I1 + I2 + I3 + …. + In

Now, we can write I1 as V/R1, I2 as V/R2 and so on upto nth resistors according Ohm’s Law.