A certain voltage divider consists of two 12 kΩ resistors in series. Which of the following load resistors will have the most effect on the output voltage?
A. 1 MΩ
B. 24 kΩ
C. 18 kΩ
D. 12 kΩ
Answer: Option D
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Related Questions on Series Parallel Circuits
The internal resistance of a 20,000 ohm/volt voltmeter set on its 5 V range is
A. 20,000 Ω
B. 100,000 Ω
C. 200,000 Ω
D. 1,000,000 Ω
A. 2 V, 4 V
B. 2 V, 2 V
C. 2 V, 6 V
D. 4 V, 6 V
For two resistors in series
R1 = 12 kohm + 12 kohm =24 kohm
As voltage divider formula is given as
Vout = Vin × (R2 / R1+R2)
Vout /Vin = R2/R1+R2
For most effect Vout/Vin should be minimum i.e. value of R2 should be as low as possible.
Thus, R2 = 12 kohm