If a transistor amplifier draws 2mA when input voltage is 10 V, then its input impedance is ____________?
Correct answer: D. 5 kΩ
- A. 20 kΩ
- B. 2 kΩ
- C. 10 kΩ
- D. 5 kΩ
Explanation
Input impedance is found from Ohm's law: Z = V/I = 10 V / 0.002 A = 5000 Ω, or 5 kΩ.
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