Analog Electronics
In CB configuration, the output V-I characteristics of a transistor are drawn by taking

  VCE versus IC for constant IE.
  VCB versus IC for constant IE.
  VCB versus IB for constant IE.
  VCB versus IB for constant IE.

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Analog Electronics
In all base driver amplifiers

ac collector voltage is in phase with ac base voltage
None of these
ac collector voltage is 180° out of phase with ac base voltage
ac emitter voltage is 180° out of phase with ac base voltage

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