If ground is applied to the (+) terminal of an inverting op-amp, the (-) terminal will_____________?
Correct answer: B. Be virtual ground
- A. Not need an input resistor
- B. Be virtual ground
- C. Have high reverse current
- D. Not invert the signal
Explanation
With the non-inverting terminal grounded and negative feedback present, the virtual-short rule forces the inverting terminal to approximately 0 V as well. It is called a virtual ground because it is not physically connected to ground.
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