Given below are two statements
Statement I: Photovoltaic cells are often made up of crystal silicon.
Statement II: Photovoltaic cells are also made up of inexpensive amorphous silicon, which is like ordinary glass and has no crystal properties.
In light of the above statements, choose the most appropriate answer from the options given below:नीचे दो कथन दिए गए हैं
कथन I: प्रकाश-वोल्टीय (photovoltaic) सेल प्रायः क्रिस्टलीय सिलिकॉन से बने होते हैं।
कथन II: प्रकाश-वोल्टीय सेल सस्ते अक्रिस्टलीय (amorphous) सिलिकॉन से भी बनते हैं, जो साधारण काँच जैसा होता है और जिसमें क्रिस्टलीय गुण नहीं होते।
उपर्युक्त कथनों के आलोक में, नीचे दिए गए विकल्पों में से सर्वाधिक उपयुक्त उत्तर चुनिए:
Pick an option to check yourself, or open the answer below.
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Correct answer: A. Both Statement I and Statement II are correctकथन I और कथन II दोनों सही हैं
Explanation
Most commercial solar cells are indeed made from mono- or poly-crystalline silicon, so Statement I is correct. Thin-film cells are made from amorphous silicon, a cheaper non-crystalline form whose atoms are randomly arranged like those in ordinary glass, so Statement II is also correct. Hence both statements are correct.अधिकांश व्यावसायिक सौर सेल वस्तुतः एकल-क्रिस्टलीय या बहु-क्रिस्टलीय सिलिकॉन से बनते हैं, अतः कथन I सही है। पतली-फिल्म वाले सेल अक्रिस्टलीय सिलिकॉन से बनाए जाते हैं, जो सस्ता अक्रिस्टलीय रूप है और जिसके परमाणु साधारण काँच की भाँति अव्यवस्थित ढंग से सज्जित होते हैं, अतः कथन II भी सही है। अतः दोनों कथन सही हैं।More People, Development and Environment questions
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