What is voltage divider
Voltage divider rules state that , the voltage across any resistance in a series circuit us the source voltage times the ratio of that resistance to the total resistance of the circuit
It is used to calculate the voltage across desired elements
Yes of course we do have ohm’s law but using voltage divider in some cases is more easy .
For example
In following circuit , let’s say we need to find VR(34), For this purpose we will do the following steps
1. Find Rt
2. Find total Current
3. Find individual voltage of R3 and R4
4. Add R3 and R4 voltages
How ever in VDR we can solve this using a simple formula
Voltage Divider Equation
We know to find Voltage in particular element we use ohms law
Where as I total is
Voltage Divider Explained
Use 1 : Find Direct Voltage Across Resistor
Lets say we have a circuit with R1 and R2 , with Voltage V and we want , to find R1 and R2 using VDR
Here the voltage divider formula can be used as
Use 2 : Find Voltage across 2 or More resistor
Lets say we have a following circuit , and we need to find , V R34
Using VDR we can simply get the answer using following equation
Use 3 : Finding Voltage between Resistors
Lets say for the following case , we need to find the V out , which is a point that lies between R1 and R2.
There are two methods two solve this , one using R1 and the other using R2
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