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A bridge intended for use up to 100 kHz would use arms wound

  • A.as ordinary solenoids
  • B.on iron cores
  • C.with as many turns as possible in order to raise the resistance of the arm
  • D.with a non-inductive winding of low self capacitance

Answer: D

At a hundred kilohertz the residual inductance and self capacitance of a resistor are no longer negligible against its resistance. Arms for such work are wound in a way that cancels the flux, and are kept physically small so that the capacitance between turns is low.

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