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A thermistor differs from a resistance thermometer in that its resistance

  • A.changes only above a definite threshold temperature
  • B.falls sharply as the temperature rises
  • C.rises linearly with temperature over a wide range
  • D.is unaffected by temperature but changes with strain

Answer: B

The common thermistor has a large negative temperature coefficient and a markedly nonlinear characteristic. That gives a large signal over a narrow range, whereas a platinum resistance thermometer is nearly linear over hundreds of degrees but changes only slowly.

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