The position of a particle is given by : →r = (^i+2^j-^k) and momentum →p =(3^i+4^j-2^k) . The angular momentum is perpendicular to (a) X-axis (b) Y-axis (c) Z-axis (d) Line at equal angles to all the three axes Ans. …
Flame Institute
a. As a filler b. To increases leathering c. To prevent rapid drying d. To make soap granules Ans. c Explanation : Glycerol is added to shaving soap to prevent rapid drying while to enhance the leathering property of soap …
(a) Drosera and Rafflesia (b) Nepenthes and bladder wart (c) Dionaea and Viscum (d) Venus fly trap and Rafflesia Answer: b (63)
(a) mgR (b) 1/2 mgR (c) 2 mgR (d) 1/4 mgR Answer: b (251)
A flywheel of moment of inertia 0.32 kg–m2 is rotated steadily 120 rad/s at by a 50 w electric motor. The kinetic energy of the flywheel is (a) 4608 J (b) 1152 J (c) 2304J (d) 6912J Ans. …
A metal bar of length L and area of cross-section A is clamped between two rigid supports. For the material of the rod, its Young’s modulus is Y and coefficient of linear expansion is . If the temperature of the …
The escape velocity from earth is ves. A body is projected with velocity 2 ves with what constant velocity will it move in the inter planetary space (a) ves (b) 3ves (c) √3 …
30. Increase in length of a wire is 1 mm when suspended by a weight. If the same weight is suspended on a wire of double its length and double its radius, the increase in length will (a) 2 mm …
25. The spring balance does not read properly after its long use, because (a) The elasticity of spring increases (b) The elasticity decreases (c) Its plastic power decreases (d) Its plastic power increases EXPLANATION-B (243)
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 the ceiling in a room. The increase in length due to its own weight will be (a) 9.6×10-5 m …
(a) It will continue to move with velocity v along the original orbit of spacecraft (b) It will move with the same speed tangentially to the spacecraft (c) It will fall down to the earth gradually (d) It will go …
(a) 100% (b) 41.4% (c) 50% (d) 59.6% Answer: b (4)
(a) Oogamy (b) Anisogamy (c) Isogamy (d) Isogamy and oogamy both Ans. c (8)
(a) 1 kg m2 (b) 0.1 kg m2 (c) 2 kg m2 (d) 0.2 kg m2 Ans. b (11)
(a) It is a freely falling body (b) It suffers no acceleration (c) It is moving with a constant speed (d) Its angular momentum remains constant Answer: b (7)
(a) L = 500 cm, d = 0.05 mm (b) L = 200 cm, d = 0.02 mm (c) L = 300 cm, d = 0.03 mm (d) L = 400 cm, d = 0.01 mm Answer-d (11)
(a) A cylinder of same mass but of smaller radius (b) A cylinder of same mass but of larger radius (c) A cylinder of same radius but of smaller mass (d) A hollow cylinder of same mass and same radius …
(a) 1/4 (GMm /R) (b) 1/6 ( (GMm /R) (c) 2/3 (GMm /R) (d) 1/3 (GMm /R) Answer: b (40)
a. Si – O – Si linkage b. O – Si – O linkage c. Si – C – linkage d. Si – S – O linkage Ans. a (8)
24.To double the length of a iron wire having area of cross-section 0.5 cm2, the required force will be (Y=1012 dyne/cm2) (a) 1.0×10-7 N (b) …
a. Polymers b. Copolymer c. Addition d. Condensation polymer Ans. b (30)
(a) Half (b) Same (c) Double …
(a) Equal to that on A (b) Four times that on A (c) Two times that on A (d) Half that on A Explanation-B (24)
(a) v/R (b) Continuously increasing (c) Dependent on mass (d) Independent of radius (R) Ans. a (62)
(a) 1/5 (b) 5/2 (c) 3/5 (d) 5/7 Ans. b (6)
(a) GM/R2 (b) m0 (c) mM (d) 1/R3/2 …
(a) Angular velocity and total energy (kinetic and potential) (b) Total angular momentum and total energy (c) Angular velocity and moment of inertia about the axis of rotation (d) Total angular momentum and moment of inertia about …
(a) 8 (b) 6 (c) 4 (d) 2 Ans. d (6)
(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 …
(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 …
(a) Revolves about the polar axis (b) Has a time period less than that of the near earth satellite (c) Moves faster than a near earth satellite (d) Is stationary in the space Answer: a (12)
(a) Green algae (b) Brown algae (c) Red algae (d) Blue green algae Ans. c (8)
(a) R2 (b) R–2 (c) R4 (d) R–4 Answer: c (17)
(a) It is a force (b) It has no unit (c) It has same value in all systems of units (d) It depends on the value of the masses (e) It does not depend on the nature of the …
(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 …
(a) 10 m (b) 8 m (c) 6 m (d) 4 m Ans. d (42)
(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 …