2022
-
May 23, 2022
The least velocity required to throw a body away from the surface of a planet so that it may not...
-
May 23, 2022
Young’s modulus of rubber is 104 N/m2 and area of cross-section is 2 cm2 . If force of 2×105 dynes...
-
May 23, 2022
For silver, Young’s modulus is 7.25×1010 N/m2 and Bulk modulus is 11×1010 N/m. Its Poisson’s ratio will be (a) –...
-
May 23, 2022
The length of a wire is 1.0 m and the area of cross-section is 1.0×10-2 cm2 . If the work...
-
May 23, 2022
46.A force of 200 N is applied at one end of a wire of length 2 m and having area...
-
May 23, 2022
A ball of radius 11 cm and mass 8 kg rolls from rest down a ramp of length 2m. The...
-
May 23, 2022
40. The interatomic distance for a metal is 3×10-10 m . If the interatomic force constant is 3.6×10–9 N/Å ,...
-
May 23, 2022
Longitudinal stress of 1 kg/mm2 is applied on a wire. The percentage increase in length is (Y=1011 N/m2) (a) 0.002 ...
-
May 23, 2022
How much energy will be necessary for making a body of 500 kg escape from the earth [g=9.8 m/s2 ,...
-
May 23, 2022
33. An aluminum rod (Young’s modulus=7×109 N/m2) has a breaking strain of 0.2%. The minimum cross-sectional area of the rod...
-
May 23, 2022
A ring takes time t1 in slipping down an inclined plane of length L and takes time t2 in rolling...
-
May 23, 2022
A hollow cylinder is rolling on an inclined plane, inclined at an angle of 30° to the horizontal. Its speed...
-
May 23, 2022
v e and vp denotes the escape velocity from the earth and another planet having twice the radius and the...
-
May 23, 2022
Solid cylinders of radii r1,r2,r3 and roll down an inclined plane from the same place simultaneously. If , r1>r2>r3 which...
-
May 23, 2022
An inclined plane makes an angle of 30° with the horizontal. A solid sphere rolling down this inclined plane from...
-
May 23, 2022
A body rotating at 20 rad/sec is acted upon by a constant torque providing it a deceleration of 2 rad/sec2....
-
May 23, 2022
32. A rod of length l and area of cross-section A is heated from 0°C to 100°C. The rod is...
-
May 23, 2022
31.The temperature of a wire of length 1 metre and area of cross-section is 1 cm2 is increased from 0°C...
-
May 23, 2022
30. Increase in length of a wire is 1 mm when suspended by a weight. If the same weight is...
-
May 23, 2022
29. An area of cross-section of rubber string is 2 cm2 . Its length is doubled when stretched with a...
-
May 23, 2022
28. Steel and copper wires of same length are stretched by the same weight one after the other. Young’s modulus...
-
May 23, 2022
27. Why the spring is made up of steel in comparison of copper (a) Copper is more costly than steel...
-
May 23, 2022
26.Two wires of equal lengths are made of the same material. Wire A has a diameter that is twice as...
-
May 23, 2022
25. The spring balance does not read properly after its long use, because (a) The elasticity of spring increases (b) ...
-
May 23, 2022
A flywheel has moment of inertia 4 kg-m2 and has kinetic energy of 200 J. Calculate the number of revolutions...
-
May 23, 2022
A wheel of moment of inertia 10 kg-m2 is rotating at 10 rotations per minute. The work done in increasing...
-
May 23, 2022
The Young’s modulus of a rubber string 8 cm long and density 1.5 kg/m3 is 5×108 N/m2 , is suspended on...
-
May 23, 2022
(a) Laws of motion (b) Laws of rotational motion (c) Laws of planetory motion (d) Laws of curvilinear motion Answer:...
-
May 23, 2022
(a) Antheredium (b) Protonema (c) Archegonia (d) Capsule Ans. b (7)
-
May 23, 2022
(a) 1/2 year (b) 2√2 years (c) 4 years (d) 8 years Answer: b (6)
-
May 23, 2022
(a) Meroblastic (b) Coeloblastic (c) Metablastic (d) Holoblastic Ans. d (8)
-
May 23, 2022
(a) 1 : 2 (b) 1 : 1 (c) 1 : 3 (d) None of these Answer: b (6)
-
May 23, 2022
A satellite A of mass m is at a distance of r from the centre of the earth. Another satellite...
-
May 23, 2022
(a) Antheridiophore (b) Archegoniophore (c) Sporophyte (d) Gametophyte Ans. c (8)
-
May 23, 2022
(a) Haploid (b) Tetraploid (c) Diploid (d) Triploid Ans. c (6)
-
May 23, 2022
(a) Conservation of energy (b) Conservation of linear momentum (c) Conservation of angular momentum (d) None of these Answer: c...
-
May 23, 2022
(a) Fertile tissue (b) Photosynthesis (c) Nutrition (d) Protecting tissue Ans. c (8)
-
May 23, 2022
(a) 8 times (b) 4 times...