When an $n-p-n$ junction transistor is used as an amplifier in common emitter mode,

  • A
    the base-emitter junction is reverse biased.
  • B
    the input impedance is high and the output impedance is low.
  • C
    input signal is applied between the base and emitter and the output is obtained between collector and emitter.
  • D
    the input voltage and the output voltage are in phase.

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