# Resistor Series Parallel Formula

## To calculate the total resistance of the series circuit

$R_{t} = R_{1}+R_{2}+R_{3}$

Where,

Rt= Total Resistance

R1 = Resistance 1

R2 = Resistance 2

R3 = Resistance 3

## Total Resistance Of 2 Resistors Connected parallel

$R_{t} = \frac{R_{1}R_{2}}{R_{1}+R_{2}}$

Where,

Rt= Total Resistance

R1 = Resistance 1

R2 = Resistance 2

## Total Resistance Of 3 or more Resistors Connected parallel

$\frac{1}{R_{t}}=\frac{1}{R_{1}}+\frac{1}{R_{2}}+\frac{1}{R_{3}}+——$

Where,

Rt= Total Resistance

R1 = Resistance 1

R2 = Resistance 2

R3 = Resistance 3

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