Analog Electronics
In a rectifier circuit, the diode converts

 alternating voltage to direct voltage.
 alternating current to direct voltage.
 both (A) and (C) options are connect.
 alternating voltage to direct current.

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Analog Electronics
The common-source JFET amplifier has

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

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