Figure shows an RC potentiometer to measure ac voltage. It is desired that V0/Vi should be independent of frequency. The value of C should be
Electronics and Communication Engineering
Measurements and Instrumentation
Choose an option
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A10 μF
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B11 μF
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C0.1 μF
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D0.09 μF
Answer
Correct Answer: 10 μF
Explanation
Since resistances are in the ratio of 10 : 1, capacitances should be in the ratio of 1 : 10 because XC ∝ 1/C.