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Which bridge would be chosen to measure the inductance of a coil whose quality factor is about 0.5?

  • A.Anderson's bridge
  • B.Hay's bridge
  • C.the Maxwell-Wien bridge with a parallel resistance of several megohms in the standard arm
  • D.the Wien bridge

Answer: A

A quality factor below one is a very lossy coil. Hay's bridge is ruled out because its inductance expression is only approximate at low Q, and the Maxwell-Wien bridge would need an unmanageably large parallel resistance. Anderson's bridge handles such coils well.

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