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Voltage Divider Calculator
Input voltage from the battery and the value of two resistors of different resistance to find the output voltage of the circuits.
Voltage Divider Calculator
Voltage Divider Calculator is used to find the output voltage of the voltage divider circuit.
What is the Voltage divider?
A voltage divider is a simple circuit that consists of two resistors connected in series with the voltage battery to find the output voltage of the circuits. It is commonly used to obtain a desired output voltage from a given input voltage.
Formula of the Output Voltage:
The output voltage (Vout) of voltage divider circuits can be determined using the below formula.
Vout = (Vin × Rb) / (Ra + Rb)
Where,
- Vout = out-put voltage series circuit
- Vin = input voltage of the series circuit
- Ra = value of the first resistor (in ohm)
- Rb = value of the second resistor (in ohm)
How to evaluate the output voltage?
Example 1:
Let's assume we have two resistors, resistor one with a value of 4 kilohms (kΩ) and resistor two with a value of 6 kilohms (kΩ). Suppose the input voltage (Vin) of circuits is 12 volts then calculate the output voltage (Vout) using a voltage divider circuit.
Solution:
Step 1:
Write the data from the above conditions.
Vin = 12 volts, Ra = 4 kΩ, Rb = 6 kΩ, Vout=?
Step 2:
Write the formula of the voltage divider.
Vout = (Vin × Rb) / (Ra + Rb)
Step 3:
Substitute the values into the above formula.
Vin = 12, Ra = 4, Rb = 6
Vout = (Vin × Rb) / (Ra + Rb)
Vout = (12 ×6) / (4 + 6))
Vout = (12 × 6) / (10)
Vout = 72/10
Vout = 7.2 volts
Example 2:
Let's assume we have two resistors, resistor one with a value of 3 kilohms (kΩ) and resistor two with a value of 1 kilohm (kΩ). Suppose the input voltage (Vin) of circuits is 9 volts then calculate the output voltage (Vout) using a voltage divider circuit.
Solution:
Step 1:
Write the data from the above conditions.
Vin = 9 volts, R1 = 3 kΩ, R2 = 1 kΩ, Vout=?
Step 2:
Write the formula of the voltage divider.
Vout = (Vin × Rb) / (Ra + Rb)
Step 3:
Substitute the values into the above formula.
Vin = 9, Ra = 3, Rb = 1.
Vout = (Vin × Rb) / (Ra + Rb)
Vout = (9 × 1) / (3 + 1))
Vout = (9 × 1) / (4)
Vout = 9/4
Vout = 2.25 volts