Which principle is used in solar cells?
Correct answer: B. Charge
- A. Momentum
- B. Charge
- C. Mass
- D. All of these options are correct
Explanation
Solar cell devices are known to follow the 'photovoltaic effect', which is the conversion of sunlight to direct current. Since the current is involved, the option, closest to the current, is 'Charge'. The principle used in solar cells is the movement of charge, making option B correct. Neither momentum nor mass is directly involved in the operation of solar cells, making options A and C incorrect.
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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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