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Shilpa

HomeAuthor: ShilpaPage 14
16.Coefficient of isothermal elasticity Eθ and coefficient of adiabatic elasticity E∅ are related by (λ = CP/CV) (a)Eθ = λE∅ ...

15. The isothermal bulk modulus of a gas at atmospheric pressure is

(a)   1 mm of Hg                           (b)   13.6 mm of Hg (c)  1.013×105 N/m2             ...

14. A ball falling in a lake of depth 200 m shows 0.1% decrease in its volume at the bottom. What is the bulk modulus of the material of the ball

(a)  19.6×108 N/m2                           (b)  19.6×10-10  N/m2 (c)  19.6×1010 N/m2 ...

13. A uniform cube is subjected to volume compression. If each side is decreased by 1%, then bulk strain is

(a)  0.01                                     ...

12. Bulk modulus was first defined by

(a)   Young                                              (b)   Bulk (c)   Maxwell                             ...
10. When a pressure of 100 atmosphere is applied on a spherical ball, then its volume reduces to 0.01%. The...
9. The compressibility of a material is (a)   Product of volume and its pressure (b)   The change in pressure per...

8. If a rubber ball is taken at the depth of 200 m in a pool, its volume decreases by 0.1%.

If the density of the water is 1× 103 Kg/m3   and g=10 m/s 2, then the volume elasticity in...
7. The compressibility of water is  4×10-5  per unit atmospheric pressure. The decrease in volume of 100 cubic centimeter of...

4. Water enters through end A with speed and leaves through end B with speed  of a cylindrical tube AB.

The tube is always completely filled with water. In case I tube is horizontal and in case II it is...

21. A boat carrying steel balls is floating on the surface of water in a tank. If the balls are thrown into the tank one by one, how will it affect the level of water

(a)  It will remain unchanged (b)   It will rise (c)   It will fall (d)  First it will first rise and...

3. An incompressible liquid flows through a horizontal tube as shown in the following fig. Then the velocity v of the fluid is

(a)  3.0 m/s                                           (b)   1.5 m/s (c)   1.0 m/s                       ...

2. Two water pipes of diameters 2 cm and 4 cm are connected with the main supply line. The velocity of flow of water in the pipe of 2 cm diameter is

(a)   4 times that in the other pipe (b)   1/4 times that in the other pipe (c)   2 times that...

1. In which one of the following cases will the liquid flow in a pipe be most streamlined

(a)  Liquid of high viscosity and high density flowing through a pipe of small radius (b)   Liquid of high viscosity...

24. A candle of diameter d is floating on a liquid in a cylindrical container of diameter D (D>>d) as shown in figure. If it is burning at the rate of 2cm/hour then the top of the candle will          

(a)   Remain at the same height (b)   Fall at the rate of 1 cm/hour (c)   Fall at the rate of ...

27. Construction of submarines is based on

(a)   Archimedes’ principle       (b)   Bernoulli’s theorem (c)   Pascal’s law                          (d)   Newton’s laws Answer-a (13)

26. A large ship can float but a steel needle sinks because of

(a)   Viscosity                                         (b)   Surface tension (c)   Density                         ...

25. An ice block contains a glass ball when the ice melts within the water containing vessel, the level of water

(a)  Rises                                                (b)   Falls (c)   Unchanged                             ...

23. A wooden cylinder floats vertically in water with half of its length immersed. The density of wood is

(a)   Equal of that of water (b)   Half the density of water (c)   Double the density of water (d)   The...

22. Two pieces of metal when immersed in a liquid have equal upthrust on them; then

(a)   Both pieces must have equal weights (b)   Both pieces must have equal densities (c)   Both pieces must have equal...

2. Two bodies are in equilibrium when suspended in water from the arms of a balance. The mass of one body is 36 g and its density is

2. Two bodies are in equilibrium when suspended in water from the arms of a balance. The mass of one...

122. The Poisson’s ratio cannot have the value

(a)  0.7                                     ...

6. If the volume of the given mass of a gas is increased four times, the temperature is raised from 27°C to 127°C. The elasticity will become

(a)   4 times                                   (b)  ...

5. The ratio of the adiabatic to isothermal elasticities of a triatomic gas is

(a)  3/4                                     ...

4. The only elastic modulus that applies to fluids is

  (a)   Young’s modulus                (b)   Shear modulus (c)   Modulus of rigidity             (d)   Bulk modulus Answer-d (17)

3. The specific heat at constant pressure and at constant volume for an ideal gas are

The specific heat at constant pressure and at constant volume for an ideal gas are Cp and Cv and its...

2. The adiabatic elasticity of a gas is equal to

(a)  γ×density                                    (b)   γ×volume (c)   γ×pressure                             ...

1. The isothermal elasticity of a gas is equal to

(a)  Density                                           (b)   Volume (c)   Pressure                             ...

125. Four identical rods are stretched by same force. Maximum extension is produced in

(a)  L=10cm ,D=1mm                 (b)  L=100cm ,D=2mm (c)  L=200cm ,D=3mm          ...

124.

A material has Poisson’s ratio 0.50. If a uniform rod of it suffers a longitudinal strain of 2×10-3 , then...

123. There is no change in the volume of a wire due to change in its length on stretching. The Poisson’s ratio of the material of the wire is

(a)   + 0.50                                     (b)   – 0.50 (c)   0.25                                         (d)   – 0.25 Answer-b (11)

121. The value of Poisson’s ratio lies between

(a) –1 to   1/2                                 ...

120. A rubber cord 10 m long is suspended vertically. How much does it stretch under its own weight (Density of rubber is 1500

A rubber cord 10 m long is suspended vertically. How much does it stretch under its own weight (Density of...

119. A substance breaks down by a stress of

A substance breaks down by a stress of 106 N/m2. If the density of the material of the wire is...

118. A wire of cross section

A wire of cross section 4 mm2 is stretched by 0.1 mm by a certain weight. How far (length) will...

117. A wire of length 2 m is made from  10

A wire of length 2 m is made from  10 cm3 of copper. A force F is applied so that...

113. In the Young’s experiment, If length of wire and radius both are doubled then the value of  Y will become

In the Young’s experiment, If length of wire and radius both are doubled then the value of  Y will become...

116. Young’s modulus of perfectly rigid body material is

(a)   Zero                                        (b)   Infinity (c)  1×1010 N/m2                        (d) ...

115. A wire of diameter 1mm breaks under a tension of 1000 N. Another wire, of same material as that of the first one, but of diameter 2 mm breaks under a tension of

(a)   500 N                                      (b)   1000 N (c)   10000 N                                 (d)   4000 N Answer-d (12)

114. Minimum and maximum values of Poisson’s ratio for a metal lies between

(a)   -∞ to +∞                            (b)   0 to 1 (c)  -∞ to 1                                 (d)   0 to 0.5 Answer-d (12)
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