Exam-style question
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EC38: For Operational amplifier configurations, a student is analysing a summing amplifier mixer. Which option gives the best Summing amplifier configuration reasoning for the objective "Explain the role of input resistors"?.
- A.EC38 correct: In the summing amplifier mixer, the answer follows the signal path from input condition to component response to output change, so it supports Explain the role of input resistors.
- B.EC38 distractor: It names a component but does not connect the input condition to the measured output in Summing amplifier configuration.
- C.EC38 distractor: It reverses the cause-and-effect chain, so the output is explained before the circuit condition is set.
- D.EC38 distractor: It gives a generic electronics definition without applying the summing amplifier mixer context.
Model answer
What a good answer should say
- The correct option is EC38 correct: In the summing amplifier mixer, the answer follows the signal path from input condition to component response to output change, so it supports Explain the role of input resistors.
Explanation
Why this works
It is best because it keeps Summing amplifier configuration anchored to the circuit signal path: input condition, component response, then output change. The distractors are wrong because they omit the output link, reverse the electronics causality, or drift into a generic component definition rather than applying the summing amplifier mixer.
Common mistake
No common mistake is linked to this question yet.