(a) Shearing (b) Longitudinal (c) Volume (d) Transverse Answer-a (5)
(a) 3Y=K(1-σ) (b) K=(9ηY)/(Y+η) (c) σ=(6K+η)Y (d) σ=(0.5Y-η)/η …
Two discs of moment of inertia I1 and I2 and angular speeds ω1 and ω2 are rotating along collinear axes passing through their centre of mass and perpendicular to their plane. If the two are made to rotate together along the …
(a) 4 : 1 (b) 16 : 1 (c) 8 : 1 (d) 1 : 1 Answer-d (45)
(a) Too less (b) Greater than all matters (c) Less than all matters (d) Zero Answer-b (9)
19. The pressure applied from all directions on a cube is P. How much its temperature should be raised to maintain the original volume ? The volume elasticity of the cube is β and the coefficient of volume expansion is …
21. For a constant hydraulic stress on an object, the fractional change in the object’s volume (ΔV/V) and its bulk modulus (B) are related as (a) (ΔV/V) ∝ B (b) (ΔV/V) ∝ 1/B (c) …
A circular platform is free to rotate in a horizontal plane about a vertical axis passing through its center. A tortoise is sitting at the edge of the platform. Now, the platform is given an angular velocity w0. When the …
20. The pressure of a medium is changed from 1.01 × 105 Pa to 1.165 × 105 Pa and change in volume is 10% keeping temperature constant. The Bulk modulus of the medium is (a) 204.8 ×105 Pa (b) …
(a) Young’s modulus (b) Coefficient of volume elasticity (c) Modulus of rigidity (d) Poisson’s ratio Answer-b (11)
(a) Mω (b) (M+4m)ω/M (c) (M-4m)ω/M+4m (d) Mω/4m Ans. a (8)
(a) Zero (b) Unity (c) Infinity (d) Between 0 to 1 Answer-c (16)
(a) Is equal to its volume V (b) Is equal to p/2 (c) Is equal to its pressure p (d) Can not be determined Answer-c (25)
16.Coefficient of isothermal elasticity Eθ and coefficient of adiabatic elasticity E∅ are related by (λ = CP/CV) (a)Eθ = λE∅ (b) E∅ =λEθ (c) Eθ = …
(a) 1/4 RQ (b) 3/8 RQ (c) 3/5 RQ (d) 2/5 RQ Ans. c (77)
(a) 1 mm of Hg (b) 13.6 mm of Hg (c) 1.013×105 N/m2 (d) 2.026×105 N/m2 Answer-c (11)
(a) 19.6×108 N/m2 (b) 19.6×10-10 N/m2 (c) 19.6×1010 N/m2 (d) 19.6×10–8 N/m2 Answer-a (9)
(a) 0.01 (b) 0.06 (c) 0.02 …
(a) Young (b) Bulk (c) Maxwell (d) None of the above Answer-c (7)
10. When a pressure of 100 atmosphere is applied on a spherical ball, then its volume reduces to 0.01%. The bulk modulus of the material of the rubber in dyne/cm2 is (a) 10×1012 …
9. The compressibility of a material is (a) Product of volume and its pressure (b) The change in pressure per unit change in volume strain (c) The fractional change in volume per unit change in pressure (d) None of the …
(2^i-4^j+2^k)N acts at a point metre(3^i +2^j-4^k) from the origin. The magnitude of torque is (a) Zero (b) 24.4 N-m (c) 0.244 N-m (d) 2.444 N-m Ans. b (7)
If the density of the water is 1× 103 Kg/m3 and g=10 m/s 2, then the volume elasticity in (N/m2) will be (a) 108 …
7. The compressibility of water is 4×10-5 per unit atmospheric pressure. The decrease in volume of 100 cubic centimeter of water under a pressure of 100 atmosphere will be (a) 0.4 cc (b) 4×10-5 cc (c) 0.025 cc …
The tube is always completely filled with water. In case I tube is horizontal and in case II it is vertical with end A upwards and in case III it is vertical with end B We have v1 = v2 …
(a) It will remain unchanged (b) It will rise (c) It will fall (d) First it will first rise and then fall Answer-c (5)
(a) 3.0 m/s (b) 1.5 m/s (c) 1.0 m/s (d) 2.25 m/s Answer-c (6)
(a) 4 times that in the other pipe (b) 1/4 times that in the other pipe (c) 2 times that in the other pipe (d) 1/2 times that in the other pipe Answer-a (4)
(a) Liquid of high viscosity and high density flowing through a pipe of small radius (b) Liquid of high viscosity and low density flowing through a pipe of small radius (c) Liquid of low viscosity and low density flowing through …
(a) Remain at the same height (b) Fall at the rate of 1 cm/hour (c) Fall at the rate of 2 cm/hour (d) Go up the rate of 1cm/hour Answer-b (5)
(a) Archimedes’ principle (b) Bernoulli’s theorem (c) Pascal’s law (d) Newton’s laws Answer-a (11)
(a) Viscosity (b) Surface tension (c) Density (d) None of these Answer-d (9)
(a) Rises (b) Falls (c) Unchanged (d) First rises and then falls Answer-b (13)
(a) Equal of that of water (b) Half the density of water (c) Double the density of water (d) The question is incomplete Answer-b (6)
(a) Both pieces must have equal weights (b) Both pieces must have equal densities (c) Both pieces must have equal volumes (d) Both are floating to the same depth Answer-c (5)
(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. (b) If both assertion and reason are true but reason is not the correct explanation of the assertion. (c) If assertion is …
Assertion : Gravitational field is zero both at centre and infinity. Reason : The dimensions of gravitational field is [ LT-2]. (a) If both assertion and reason are true and the reason is the correct explanation of the …