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The Wien bridge is chiefly used to measure

  • A.the mutual inductance between two windings on a common magnetic circuit
  • B.frequency
  • C.the capacitance of a specimen together with the angle by which its current leads
  • D.the inductance of a coil whose quality factor is too low for Hay's bridge to handle

Answer: B

Its balance depends on frequency, so once the arms are set the bridge is silent only at one frequency. That property makes it a frequency-measuring network and, with an amplifier round it, the frequency-determining element of the Wien bridge oscillator.

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