The pressure of a medium is changed from 1.01 x 105 Pa and change in volume is 10% keeping the temperature constant. The bulk modulus of the medium is:
204.8 x 105 Pa
102.4 x 105 Pa
51.2 x 105 Pa
1.55 x 105 Pa
A wire elongates by l mm when a lad W is hanging from it. If the wire goes over a pulley and two weights W each are hung at the two ends, the elongation of the wire will be (in mm) :
1/2
l
2l
zero
A metal block is experencing an atmospheric pressure of 105 N/m2. When the same block is placed in a vaccum chamber, the fractional change in its volume : (the bulk modulus of metal is 1.25 x 1011 N/m2)
8 x 10-7
1 x 10-7
4 x 10-7
2 x 10-7
A steel wire of uniform cross-section of 2 mm2 is heated upto 50oC and clamped rigidly at two ends. If the temperature of wire falls to 30oC then change in tension in the wire will be :
(Given : Coefficient of linear expansion of steel is 1.1 x 10-5°C and Young's modulus of elasticity of steel is 2 x 1011N/m2)
22 N
44 N
88 N
132 N
If S is stress and Y is young's modulus of material of a wire, the energy stored in the wire per unit volume is :
2Y / S
S / 2Y
2 S2 Y
A cube is subjected ta uniform volume compression. If the side of the cube decreases by 2 %, Calculate the bulk strain ?
0.02
0.03
0.04
0.06
An aluminium rod of Young's modulus 7.0 x 109 N/m2 has a breaking strain of 0.2%. The minimum cross-sectional area of the rod in m2 in order to support a load of 104 newton is :
1.0 x 10-2
1.0 x 10-3
1.4 x 10-2
7.1 x 10-4
For the same cross-sectional area and for a given load, teh ratio of depressions for the beam of a square cross-section and circular cross-section is :
3 : π
1 : 1
1 : π
A metal of ring of initial radius r and cross - sectional area A is fitted onto a wooden disc of radius R > r. if Young's modulus of the metal is Y, then the tension in the ring is:
The diameter of brass rod is 4 mm. Young's modulus of brass is 9 X 109 N / m 2. The force required to stretch 0.1 % of its length is :
360 π N
36 N
36 π X 105 N
144 π X 103 N
