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Jamana Prasad Kalam Jamana Prasad Kalam 3 years, 9 months ago
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Sia ? 4 years, 2 months ago
विज्ञान (Science) का शाब्दिक अर्थ - वस्तु का व्यवस्थित ज्ञान है। विज्ञान शब्द की उत्पत्ति लैटिन भाषा के शब्द Skientia से हुई है , जिसका अर्थ है - ज्ञान या जानना। ... इससे यह स्पष्ट होता कि प्रकृति में पाई जाने वाली वस्तुओं एवं इनमें होने वाली अनेक घटनाओं का अध्ययन या ज्ञान प्राप्त करना ही विज्ञान है।
Aaditya Kumar 3 years, 11 months ago
Posted by Satyam Kr. Thakur 4 years, 2 months ago
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Sia ? 4 years, 2 months ago
दिया है : सर्वांगसम वृत्तों की दो जीवाएँ AB तथा CD इस प्रकार है कि इन जीवाओं द्वारा वृत्तों के केंद्र O तथा O’ पर अंतरित कोण बराबर होते हैं।
सिद्ध करना है : AB = CD
उपपत्ति :
ΔAOB तथा ΔCO'D में,
∠AOB = ∠CO'D (दिया है)
OA = O'C (सर्वांगसम वृत्तों की त्रिज्या)
OB = O'D (सर्वांगसम वृत्तों की त्रिज्या)
∴ ΔAOB ≅ ΔCO'D (SSS सर्वांगसमता नियम द्वारा)
AB = CD (CPCT द्वारा)
अतः सर्वांगसम वृत्तों की जीवाएँ उनके केन्द्रों पर बराबर कोण अंतरित करें, तो जीवाएँ बराबर होती हैं।
Posted by Satyam Kr. Thakur 4 years, 2 months ago
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Sia ? 4 years, 2 months ago
विद्युत आवेश के गति या प्रवाह में होने पर उसे विद्युत धारा (इलेक्ट्रिक करेण्ट) कहते हैं। मात्रात्मक रूप से, आवेश के प्रवाह की दर को विद्युत धारा कहते हैं। इसका SI मात्रक एम्पीयर है। एक कूलांम प्रति सेकेण्ड की दर से प्रवाहित विद्युत आवेश को एक एम्पीयर धारा कहेंगे।
Koshal Soni 2 years, 5 months ago
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Sia ? 4 years, 2 months ago
असंतृप्त चक्रीय यौगिकों (unsaturated cyclic compounds)को सुगंधित यौगिकों (aromatic compounds)के रूप में भी जाना जाता है और बेंज़िन (Benzene ) असंतृप्त चक्रीय हाइड्रोकार्बन है। इसका सूत्र C6H6 है
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Nayan Mandal 3 years ago
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