**Bulk Modulus MCQs**

The modulus of elasticity related to a change in the volume is bulk modulus (k).

Let volume V is subjected to an additional pressure dP, The increase in pressure will produce a decrease in its volume dV.

∴ Volume stress = Change in pressure

= dP

Bulk modulus is defined as the ratio of the volume stress to the volume strain.

**Q.1) Modulus of elasticity associated with the change in volume is knows as…**

a) Young’s modulus

b) Bulk modulus

c) Modulus of rigidity

d) None of these

**Q.2) Bulk modulus is applicable for…..**

a) solids

b) liquids

c) gases

d) all of above

**Q.3) The bulk modulus of material of substance if its volume is changed by 2% when there is applied pressure of 5×10 ^{6} Pa?**

a) 2.5× 10^{8} N/m^{2}

b) 5× 10^{6} N/m^{2}

c) 5× 10^{8} N/m^{2}

d) 5× 10^{8} N/m^{2}

**Q.4) The volume strain in metal sphere of Bulk modulus 1.8×** **10 ^{8} N/m^{2} when subjected to pressure of 2×**

**10**

^{7}N/m^{2}a) 0.11

b) 0.22

c) 0.33

d) 0.44

**Q.5) The original volume of vessel containing liquid is 50 ltr. Change in volume of the liquid when pressure of 1 atm is applied to vessel is if the bulk modulus of liquid is 1.5×** **10 ^{6} N/m^{2} …………**

a) 0.375 ltr

b) 1375 ltr

c) 2.375 ltr

d) 3.375 ltr

**Q.6) The pressure required to change the volume of mercury by 0.1% is (K=4.5×10 ^{8} N/m^{2})**

a) 45× 10^{5} Pa

b) 45×10^{10} Pa

c) 45× 10^{15} Pa

d) 45× 10^{20} Pa

**Q.7) If the liquid is subjected to the different pressures of 5 atm and 4 atm, the ratio of Bulk modulus of the liquid is….**

a) 1:1

b) 2:1

c) 1:2

d) 5:4

**Q.8) If the liquid of volume V is subjected to the different pressures of 5 atm and 4 atm, the ratio of change in volumes of liquid is….**

a) 1:1

b) 2:1

c) 1:2

d) 5:4

**Answers:**

Q.1) b) Bulk modulus

Q.2) d) all of above

Q.3) a) 2.5× 10^{8} N/m^{2}

Q.4) a) 0.11

Q.5) d) 3.375 ltr

Q.6) b) 45×10^{10} Pa

Q.7) a) 1:1

Q.8) d) 5:4