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The dissipation factor obtained from Schering's bridge is given by the product of the angular frequency and

  • A.the capacitance of the specimen and the resistance of the high-voltage standard arm
  • B.the ratio of the two resistive arms divided by the standard capacitance in the bridge
  • C.the time constant of the detector circuit at the frequency of the applied test voltage
  • D.the resistance and capacitance of one adjustable arm

Answer: D

Balance yields \( \tan\delta = \omega C_4 R_4 \), where the subscripted quantities are the capacitor and resistor forming the parallel adjustable arm. The dissipation factor therefore depends on frequency, so the test frequency is always quoted with the result.

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