Exam-style question
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Which of the following circuit configurations has the input signal applied to the non‑inverting (+) terminal of an op‑amp, with a feedback resistor from the output to the inverting (−) terminal?.
- A.Non‑inverting amplifier
- B.Inverting amplifier
- C.Differential amplifier
- D.Summing amplifier
Model answer
What a good answer should say
- Non‑inverting amplifier
Explanation
Why this works
Formula/rule: In a non‑inverting amplifier the input is connected to the non‑inverting (+) terminal and a feedback resistor is connected from the output to the inverting (−) terminal. Substitution: The circuit described has the input at + and a feedback resistor from output to −.
Working: This matches the rule for a non‑inverting amplifier. Answer: Non‑inverting amplifier.
Units/conclusion: The circuit is a non‑inverting amplifier.
Common mistake
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