Question

In the voltage-divider circuit shown in the figure, the no-load value of vo is 5 V When the load resistance RI is attached across the terminals a and b, vo drops to 3 V.(Figure 1) PartA Find RL Express your answer with the appropriate units RI-7.28 Submit Previous Answers Request Answer Incorrect, Try Again: One attempt remaining Provide Feedback igure 1 of 1 40Ω 20 V R2 vo

Answer 1

Here ,

for the value of R2

without load

5 = R2 * 20/(R2 + 40)

R2 = 13.33 Ohm

Now, when load is connected

let the net resistance is R

3 = R * 20/(40 + R)

R = 7.06 Ohm

Now, for RL

1/7.06 = 1/RL + 1/13.33

solving for RL

RL = 15 Ohm

the resitance RL is 15 Ohm