A circular shaft of diameter 30 mm is tested under torsion the gauge length of test specimen is 300 mm. A torque of 2kNm produces an angle twist of 1°. Calculate CJ.

A circular shaft of diameter 30 mm is tested under torsion the gauge

1.	A circular shaft of diameter 30 mm is tested under torsion the gauge length of test specimen is 300 mm. A torque of 2kNm produces an angle twist of 1°. Calculate CJ.
A.	0.432 × 106 N/mm2
B.	0.324 × 106 N/mm2
C.	0.46 × 106 N/mm2
D.	0.532 × 106 N/mm2
Answer» B. 0.324 × 106 N/mm2