Civil Engineering MCQAE Level Civil Engineering
Polar moment of inertia for hollow shaft (outer D, inner d):
Strength of MaterialsPolar MI Hollow ShaftEASY
Choose the correct answer
A
π(D³−d³)/32
B
π(D⁴−d⁴)/32
C
π(D⁴−d⁴)/64
D
π(D⁴+d⁴)/32
Correct Answer
B. π(D⁴−d⁴)/32
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J=π(D⁴−d⁴)/32 for hollow circular section.
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