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  • Question
  • 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
    Figure shows an RC potentiometer to measure ac voltage. It is desired that V0/Vi should be independe


  • Options
  • A. 10 ?F
  • B. 11 ?F
  • C. 0.1 ?F
  • D. 0.09 ?F

  • Correct Answer
  • 10 ?F 

    Explanation
    Since resistances are in the ratio of 10 : 1, capacitances should be in the ratio of 1 : 10 because XC ? 1/C.

    More questions

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    • Options
    • A. must be isolated
    • B. may or may not be isolated
    • C. should be preferably, isolated
    • D. should not be isolated
    • Discuss
    • 2. In a ripple counter,

    • Options
    • A. whenever a flip flop sets to 1, the next higher FF toggles
    • B. whenever a flip flop sets to 0, the next higher FF remains unchanged
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    • D. whenever a flip flop sets to 0, the next higher FF faces race condition
    • Discuss
    • 3. Maximum efficiency of class B power amplifier is 50%.

    • Options
    • A. True
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    • Options
    • A. Class A
    • B. Class B
    • C. Class C
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    • Options
    • A. R and L
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    • C. R and C
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    • 6. For the strip line in the given figure the capacitance per unit length =

    • Options
    • A.
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    • Options
    • A. TE01
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    • C. TE05
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    • Discuss
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    • Options
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    • B. very wide
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    • 9. If temperature is increased, the temperature coefficient of a metal

    • Options
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    • C. may increase or decrease
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    • Options
    • A. True
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