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سؤال 422

What is the typical output impedance of an op-amp?

  1. Very lowپاسخ درست
  2. Very high
  3. 100 ohms
  4. 10,000 ohms

توضیح

An operational amplifier is designed so that its output voltage barely changes with load, which means the output impedance must be very low. Negative feedback lowers it further still, typically to a fraction of an ohm.

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شروع تمرین
سؤال 422: What is the typical output impedance of an op-amp? · FCC Amateur Extra Class (Element 4) · Questena