The ratio of output voltage V0 to the voltage difference Vin between the positive (+) input and negative (-) input of a pump is (where Vin=V+ - V - :
Correct answer: B. Voltage gain
- A. Current gain
- B. Voltage gain
- C. Open-loop gain
- D. Closed-loop gain
Explanation
The correct answer is Voltage gain. It is defined as the ratio of the output voltage (V0) to the input voltage difference (Vin), which matches the description in the question. The other options are incorrect because:Current gain is unrelated to voltage as it concerns the ratio of currents.Open-loop gain describes a scenario without feedback, which is irrelevant to the question's context.Closed-loop gain involves feedback mechanisms, which are not mentioned in the question.
This question appeared on the ETEA MDCAT 2012 paper, which you can sit online with every answer explained.
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About PN Junction
A PN junction forms when p type and n type semiconductor regions meet, creating a depletion layer and a potential barrier. The topic covers forward and reverse bias, diode current voltage characteristics, breakdown and rectification, while distinguishing an ordinary junction diode from a transistor formed from multiple junctions.
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