Analog Electronics
The per unit impedance of a synchorous machine is 0.242. If base voltage is increased by 1.1 times, then per unit value will be

 0.220.
 0.266.
  0.200.
 0.242.

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Analog Electronics
Pinch-off voltage in a JFET is

 the gate to source voltage that gives zero drain current.
 the drain voltage that gives zero drain current.
 the gate to source voltage that gives unity drain current.
 the drain voltage that gives infinite drain current.

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Analog Electronics
In a transistor amplifier, the reverse saturation electric current ICO

  double for every 10° rise in temperature.
  double for every 5° rise in temperature.
  double for every 1° rise in temperature.
  increase linearly with the temperature.

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