railway RRB JE (CBT I + CBT II) Mock Test 2024 Strength of Materials Torsion of Shaft

बाहरी व्यास D और आंतरिक व्यास d के साथ एक खोखले वृत्तीय खंड का खंड मापांक (Z) इस प्रकार दिया गया है

1
\(Z = \frac{\pi}{30D} [D^5-d^4]\)
2
\(Z = \frac{\pi}{32D} [D^4-d^4]\)
3
\(Z = \frac{\pi}{16D} [D^4-d^4]\)
4
\(Z = \frac{\pi}{32D} [D^2-d^2]\)
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