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A bridge whose balance depends on frequency can be used as a

  • A.means of measuring capacitance without the frequency of the source being known
  • B.substitute for a tuned detector when the supply contains a strong harmonic content
  • C.frequency meter or the tuning element of an oscillator
  • D.detector of harmonics in a supply whose waveform departs from a sine wave

Answer: C

Balance at one frequency alone is exactly what a frequency measurement needs, and putting an amplifier around such a network makes it oscillate at that frequency. Most bridges are deliberately designed so that their balance is free of frequency, which is the opposite requirement.

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