Analog Electronics
The β of a transistor is the ratio of the

 emitter current to collector current.
 base current to collector current.
 collect current to emitter current.
  collect current to base current.

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Analog Electronics
The common-source JFET amplifier has

  a high input impedance and a very high voltage gain.
  a high input impedance and a voltage gain less than 1.
  a very high input impedance and a relatively low voltage
  no voltage gain.

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