Which of the following is a desirable feature in a transistor amplifier

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Which of the following is a desirable feature in a transistor amplifier:

  1. Low input impedance, Low output impedance
  2. Low input impedance, High output impedance
  3. High input impedance, Low output impedance
  4. High input impedance, High output impedance

Correct answer: 2. Low input impedance, High output impedance

Explanation: The transistor amplifier should have low input impedance and high output impedance so that input signal is transferred from low resistance circuit to high resistance output circuit. This results in high voltage gain and power gain.

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