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Analog circuits miscellaneous

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Analog circuits miscellaneous
  1. Assuming that operational amplifier shown in the figure is ideal, the current, I, through 1 kΩ resistor is

    1. – 4 mA
    2. – 2 mA
    3. 2 mA
    4. 4 mA
Correct Option: A

In this case, V0 = 4V

Is = -
4
 = - 2 mA
2

But Is = I + 2
∴ I = – 4 mA.


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