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लंबाई तथा एक समान अनुप्रस्थ-काट क्षेत्रफल ‘A’ के किसी बेलनाकार चालक का प्रतिरोध ‘R’ है।

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लंबाई तथा एक समान अनुप्रस्थ-काट क्षेत्रफल ‘A’ के किसी बेलनाकार चालक का प्रतिरोध ‘R’ है। उसी पदार्थ के किसी अन्य चालक जिसकी लंबाई 2.5l प्रतिरोध 0.5R है, अनुप्रस्थ काट का क्षेत्रफल होगा :

(अ) 5A
(ब) 2.5A
(स) 0.5A
(द) 1/5 A

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1 Answer

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सही विकल्प है (अ) 5A

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