Analog Electronics
A 741 C has

  a voltage gain of 100,000.
All of these
  an input impedance of 2 MΩ.
  an output impedance of 75 Ω.

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Analog Electronics
A working diode must have

 Low resistance when forward biased, while high resistance when reverse bias
 High resistance when forward biased, while low resistance when reverse bias
 Low resistance when forward or reverse biased
 High resistance when forward or reverse biased

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