Magnetism and Electrom Questions and Answers

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Q31
What device is similar to an RTD but has a negative temperature coefficient?
  • A Strain gauge
  • B Thermistor
  • C Negative-type RTD
  • D Thermocouple
Answer: Option B
Q32
The silicon-controlled rectifier can be turned off
  • A by a negative gate pulse
  • B by forced commutation
  • C with the off switch
  • D when the breakover voltage is exceeded
Answer: Option B
Q33
The output voltage of a typical thermocouple is
  • A less than 100 mV
  • B greater than 1 V
  • C Thermocouples vary resistance, not voltage.
  • D None of the above
Answer: Option A
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