The Output Voltage Of Divider Is

By Aina Parasher|Updated : July 11th, 2022

The output voltage of divider is 16 V with no-load, when load is now connected what happens to the output voltage?

  1. Zero
  2. Less than 16 V
  3. Greater than 16 V
  4. Equal to 16 V

Answer: B. Less than 16 V

The output voltage of divider is 16 V.

Solution

Voltage dividers (potential dividers) produce an output voltage as a fraction of input voltage. They are used to provide different voltage levels from a common voltage level.

The simplest and most basic type of passive voltage divider circuit is two resistors connected in series. Here, the circuit consisting of two resistors R1 and R2 are connected in series across a voltage source of voltage V1 as shown below.

According to the voltage division rule, the voltage across R2 resistor

Vout=V1×R2/(R1+R2)

Given,
Vout=V1×R2/(R1+R2)=16 V

Suppose when a load resistance of RL is connected in parallel with R2 as shown below,

Then equivalent resistance of R2 and RL combination is =R2//RL=R2×RL/R2+RL

This equivalent resistance will be less than resistance R2, so, the output voltage across a parallel combination of resistors R2 and RL will be less than 16 V.

Vout(with load)=V1[R2//RL/R1+(R2//RL)]<16 V

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