Spring Back in Sheet Metal Bending

Q. In a bending operation, if the modulus of elasticity $E$ is increased keeping all other parameters unchanged, the spring back will

1. Increases
2. Decreases
3. Remains unchanged
4. Be independent of $E$

Q.

What is stiffness modulus?

Q. In sheet metal working, the spring back increase when
P. Ratio of bend radius to sheet thickness is small
Q. Young's modulus of the sheet is low
R. Yield strength of the sheet is high
S. Tension is applied during bending

1. P, Q, R
2. Q, R
3. P, Q, S
4. P, R, S

Q.

Are stiffness and modulus the same?

Q.

Is Youngs modulus stiffness?