A flywheel has moment of inertia 4 kg-m2 and has kinetic energy of 200 J. Calculate the number of revolutions it makes before coming to rest if a constant opposing couple of 5N-m is applied to the flywheel (a) 12.8 …
A wheel of moment of inertia 10 kg-m2 is rotating at 10 rotations per minute. The work done in increasing its speed to 5 times its initial value, will be (a) 100 J (b) 131.4 J (c) 13.4 J (d) …
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) Laws of motion (b) Laws of rotational motion (c) Laws of planetory motion (d) Laws of curvilinear motion Answer: c (6)
(a) Antheredium (b) Protonema (c) Archegonia (d) Capsule Ans. b (6)
(a) 1/2 year (b) 2√2 years (c) 4 years (d) 8 years Answer: b (4)
(a) Meroblastic (b) Coeloblastic (c) Metablastic (d) Holoblastic Ans. d (6)
(a) 1 : 2 (b) 1 : 1 (c) 1 : 3 (d) None of these Answer: b (5)
A satellite A of mass m is at a distance of r from the centre of the earth. Another satellite B of mass 2m is at a distance of 2r from the earth’s centre. Their time periods are in the …
(a) Antheridiophore (b) Archegoniophore (c) Sporophyte (d) Gametophyte Ans. c (8)
(a) Haploid (b) Tetraploid (c) Diploid (d) Triploid Ans. c (6)
(a) Conservation of energy (b) Conservation of linear momentum (c) Conservation of angular momentum (d) None of these Answer: c (6)
(a) Fertile tissue (b) Photosynthesis (c) Nutrition (d) Protecting tissue Ans. c (7)
(a) 8 times (b) 4 times (c) 1/8 times (d) 1/4 times Answer: c (22)
(a) Xylem (b) Phloem (c) Pith (d) Conducting tissue Ans. d (58)
According to Kepler, the period of revolution of a planet (T) and its mean distance from the sun (r) are related by the equation (a) T3 r3 = constant (b) T2 r–3 = constant (c) Tr3 = constant …
(a) Prothallus (b) Sporophyte (c) Protonema (d) Gametophyte Ans. c (8)
(a) The orbital velocity depends on the mass of the satellite (b) A minimum velocity of 8 km/sec is required by a satellite to orbit quite close to the earth (c) The period of revolution is large if the radius …
(a) Chlorophyll–a (b) Chlorophyll–b (c) Chlorophyll–c (d) Chlorophyll–d Ans. a (10)
(a) Always autotrophic (b) Always heterotrophic (c) Both (a) and (b) (d) None of the above Ans. c (8)
(a) Fossil pteridophyte (b) A part of the sporophyte of Funaria (c) The juvenile phase of the moss gametophyte (d) None of the above Ans. c (12)
(a) Greater than the orbital speed of earth (b) Less than the orbital speed of earth (c) Equal to the orbital speed of earth (d) Zero Answer: b (15)
(a) Spore (b) Protonema (c) Columella (d) Paraphysis Ans. c (7)
(a) Buds (b) Colourless rhizoids (c) Oblique septa and discoid chloroplast (d) All of the above Ans. d (8)
(a) Xylem and phloem (b) Parenchyma (c) Collenchyma (d) Xylem Ans. b (28)
(a) In the epidermis of stem (b) In the capsule epidermis (c) In the leaf epidermis (d) All the above Ans. b (5)
(a) No fruits are produced (b) No seeds are produced (c) Antheridia and archegonia are present (d) Presence of sporophyte Ans. b (46)
(a) Has no roots and stems (b) Has sporophyte attached to the gametophyte (c) Is vascular (d) All the above Ans. b (7)
(a) 1.38 cm (b) 3.5 cm (c) 1.75 cm (d) 2.45 cm Answer-b (36)
(a) Symbiont (b) Semiparasite (c) Total parasite (d) Saprophyte Ans. b (8)
(a) Oppositely (b) Spirally (c) Opposite–decussate (d) None of the above Ans. b (10)
(a) Energy (b) Angular momen (c) Linear momentum (d) None of these Answer: b (4)
(a) Paraphysis (b) Oospores (c) Archegonium (d) Artheridium Ans. c (7)
(a) Trabeculae (b) Peristome (c) Columella (d) Prostomium Ans. d (4)
(a) Capsule of moss (b) Gametophyte, archegonia and egg of moss (c) Gametophyte, antheridia and sperm of moss (d) Gametophyte and spore of moss Ans. a (6)