Compressibility of a substance is equal to reciprocal of:

(1) Bulk modulus

(2) Young's modulus

(3) Rigidity modulus

(4) Poisson's ratio

For two different material wires of the same dimensions, Young's modulus is:

(1) Higher for A

(2) Higher for B

(3) Same for both

(4) Infinite for both

When a load of 1 kg is hung from the wire, then the extension of 2 mm is produced. Then work done by restoring force is:

(1) 200 mJ

(2) 400 mJ

(3) 10 mJ

(4) 20 mJ

The longitudinal strain is possible in:

(1) Liquid

(2) Solid

(3) Gasses

(4) All of these

Breaking stress of a steel wire of length L and radius r is F. If its radius is doubled and length is halved, its new breaking stress will be:

(1) 2F

(2) F

(3) F/2

(4) 4F

Compressed rubber ball has:

(1) decreased potential energy.

(2) increased potential energy.

(3) decreased kinetic energy.

(4) increased kinetic energy.

Stress vs strain graphs for two different wires \(A\) and \(B\) are given. If \(Y_A\) and \(Y_B\) are Young's moduli of the materials, then:
                  
1. \(Y_{A}=\sqrt{3} Y_{B} \)
2. \( \sqrt{3} Y_{A}=Y_{B} \)
3. \(Y_{A}=3 Y_{B} \)
4. \( 3 Y_{A}=Y_{B} \)

Hooke's Law is obeyed within:

(1) Elastic limit

(2) Proportionality limit

(3) Breaking point

(4) Freezing point

The length of a wire is 2.01 m when 5 kg is hanging from it and 2.02 m when 10 kg is hanging, then the natural length of wire is:

(1) 2 m

(2) 1.95 m

(3) 1.9 m

(4) 2.005 m

Elongation in the wire of length L and Young's modulus of Y when blocks of weight W each are hung as shown below-

1.  $\frac{\mathrm{WL}}{\mathrm{AY}}$

2.  $\frac{2\mathrm{WL}}{\mathrm{AY}}$

3.  $\frac{\mathrm{WL}}{2\mathrm{AY}}$

4.  $\frac{1}{4}\left(\frac{\mathrm{WL}}{\mathrm{AY}}\right)$