Analog Electronics
One of the following is the primary function of an oscillator

 generates sustained oscillations at a constant amplitude and specific frequency
None of these
 produces sinusoidal oscillations
 generates non sinusoidal waveforms

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Analog Electronics
The ICBO is the electric current that flows when some DC voltage is applied

  in the reverse direction to the emitter junction with collector open.
  in the forward direction to the collector junction with emitter open.
  in the reverse direction to the collector junction with emitter open.
  in the forward direction to the emitter junction with collector open.

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