Which best describes a field-effect transistor? A current-controlled device in w

Question

Which best describes a field-effect transistor?

  A current-controlled device in which current at the base controls the collector voltage
  A voltage-controlled device in which voltage at the gate controls the drain current
  A current-controlled device in which the current at the gate controls collector current
  A voltage-controlled device attributed to having low input impedance

_______________________________________________________________________________

      8.84 V
      7.64 V
      -7.64 V
      -8.84 V

_______________________________________________________________________________

Which best describes a field-effect transistor? A current-controlled device in which current at the base controls the collector voltage A voltage-controlled device in which voltage at the gate controls the drain current A current-controlled device in which the current at the gate controls collector current A voltage-controlled device attributed to having low input impedance What is the output voltage in the circuit given below if Rf = 210 k, Ri = 33 k, Vi = 1.2 V, and Vcc = 15 V 8.84 V 7.64 V -7.64 V -8.84 V

Explanation / Answer

FET is best described as

A voltage-controlled device in which voltage at the gate controls the drain current

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