##### 11. Question

A wire suspended vertically from one of its ends is stretched by attaching a weight of 100N to its lower end. What is the elastic potential energy stored in the wire, if the weight stretches the wire by 1.5 mm?

Answer

##### 12. Question

In an experiment to determine the Young’s modulus of the material of a wire, the length of the wire and the suspended mass are doubled. Then the Young’s modulus of the wire

Answer

##### 13. Question

The following four wires of length L and the radius r are made of same material. Which of these will have the largest extension when the same tension is applied.

Answer

##### 14. Question

Which one of he following does not affect the elasticity of a substance?

Answer

##### 15. Question

If the work done in stretching a wire by 1 mm is 2 J, the work necessary for stretching another wire of the same material but with double the radius of cross-section and half the length by 1 mm is injoules

Answer