As shown in figures "A", "B", and "C" of the...

Question 1 / 205eccefa5bacbc34ba4d486b4

Question 1 of 205eccefa5bacbc34ba4d486b4

As shown in figures "A", "B", and "C" of the illustration, if the negative DC signal voltage is more negative at the inverting input than at the non-inverting input, what will be the characteristic of the output? See illustration EL-0111.

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Question 1 of 20

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🔍 Key Concepts

• Operational amplifier (op-amp) symbol in figure A and C, noting which terminal is the inverting (-) input and which is the non-inverting (+) input • How an op-amp’s output polarity relates to which input has the more positive (or less negative) voltage • Difference between an ideal op-amp used as a comparator (very high gain) versus a simple subtractor (actual difference of inputs)

💭 Think About

• If the inverting input (-) is at a more negative voltage than the non-inverting input (+), which input is effectively more positive? How does that affect the sign of the output for an op-amp? • Look at the internal blocks in figure A labeled Differential Amplifier and Voltage Amplifier. Does an op-amp normally provide just the small input difference at the output, or does it multiply that difference by a very large gain? • Imagine slowly increasing the voltage on the non-inverting (+) input while keeping the inverting (-) input fixed. At the moment when the + input becomes higher than the – input, what happens to the output direction (positive vs. negative)?

✅ Before You Answer

• Be clear which terminal in the illustration is + (non-inverting) and which is − (inverting) before deciding the sign of the output. • Decide whether the device in EL-0111 is behaving as a high‑gain amplifier/comparator or a simple difference meter that outputs only the small, actual difference. • Confirm that when V+ > V− on an op‑amp, the output tends to drive toward the positive supply, and when V− > V+, it tends to drive toward the negative supply; then match that behavior to the wording of the choices.

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Question 1 of 20

the output voltage will be the actual difference between the input voltages and will be negative

the output voltage will be a greatly amplified difference between the input voltages and will be negative

the output voltage will be the actual difference between the input voltages and will be positive

the output voltage will be a greatly amplified difference between the input voltages and will be positive

Question 1 / 205eccefa5bacbc34ba4d486b4

Question 1 of 205eccefa5bacbc34ba4d486b4

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Question 1 of 20

5eccefa5bacbc34ba4d486b4

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🔍 Key Concepts

💭 Think About

✅ Before You Answer

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