The polar modulus for a hollow shaft of outer diameter (D) and inner d – McqOptions

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1.	The polar modulus for a hollow shaft of outer diameter (D) and inner diameter (d) is
A.	π/4(D² - d²/D)
B.	π/16(D³ - d³/D)
C.	π/16(D⁴ - d⁴/D)
D.	π/32(D⁴ - d⁴/D)
Answer» D. π/32(D⁴ - d⁴/D)

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