Analog Electronics
With both bases grounded, the only offset that produces an error is the

  input offset voltage.
  β.
  input bias current.
  input offset current.

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

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

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