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Anderson's bridge is a modification of the Maxwell-Wien bridge in which

  • A.the detector and the source are interchanged so as to improve the sensitivity of the null
  • B.a fixed capacitor is used with an extra resistance branch
  • C.the standard capacitor is made variable and the resistances are all left fixed in value
  • D.a mutual inductance replaces the capacitor in the arm opposite the unknown coil

Answer: B

A fifth arm carrying a variable resistance is added to a bridge using a fixed capacitor, and the network becomes a five-arm one whose balance is worked out by delta-star conversion. Its merit is that a fixed standard capacitor suffices and low-Q coils are handled well.

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