The major and minor principal stresses at a point are 3

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The major and minor principal stresses at a point are 3 MPa and –3 MPa respectively. The maximum shear stress at the point is

1. zero
2. 3 MPa
3. 6 MPa
4. 9 MPa

Correct Option: B

Max shear stress

=	σ₁ - σ₂
	2

=	3 - (-3)	= 3 mPa
	2