Analog Electronics
In modern the MOSFET, the material used for the gate is

  high - purity silica.
  epitaxially grown silicon.
  high - purity silicon.
  heavily doped poly crystalline silicon.

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Analog Electronics
When a transistor is connected in common emitter mode, it with have

Negligible input resistance and high output resistance
Low input resistance as well as output resistance
Medium input resistance and high output resistance
High input resistance and low output resistance

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Analog Electronics
The magnitude of electric current ICBO

  depends largely upon the emitter doping.
  depends largely upon emitter-base junction base potential.
  increases with the increase in temperature.
  is generally greater in silicon than in germanium transistor.

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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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