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May 2022

Home2022MayPage 20
A flywheel has moment of inertia 4 kg-m2 and has kinetic energy of 200 J. Calculate the number of revolutions...
A wheel of moment of inertia 10 kg-m2 is rotating at 10 rotations per minute. The work done in increasing...
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...
(a)  Laws of motion (b)  Laws of rotational motion (c)   Laws of planetory motion (d)  Laws of curvilinear motion Answer:...
(a)  Antheredium                    (b)  Protonema (c)   Archegonia                        (d)  Capsule Ans. b (7)
(a)  1/2 year                            (b) 2√2  years (c)   4 years                               (d)  8 years Answer: b (6)
(a)  Meroblastic                       (b)  Coeloblastic (c)   Metablastic                        (d)  Holoblastic Ans. d   (8)
(a)  1 : 2                                    (b)  1 : 1 (c)   1 : 3                                    (d)  None of these Answer: b (6)
A satellite A of mass m is at a distance of r from the centre of the earth. Another satellite...
(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...
(a)  Fertile tissue                     (b)  Photosynthesis (c)   Nutrition                            (d)  Protecting tissue Ans. c (8)
(a)      8 times                              (b)  4 times...
(a)  Xylem                                 (b)  Phloem (c)    Pith                           ...
According to Kepler, the period of revolution of a planet (T) and its mean distance from the sun (r) are...
The mean distance between the atoms of iron is 3×10-10 m and interatomic force constant for iron is 7 N/m....
(a)  Prothallus                          (b)  Sporophyte (c)   Protonema                        (d)  Gametophyte Ans. c (9)
(a)      The orbital velocity depends on the mass of the satellite (b)  A minimum velocity of 8 km/sec is required...
(a)  Chlorophyll–a                   (b)  Chlorophyll–b (c)   Chlorophyll–c                    (d)  Chlorophyll–d Ans. a (11)
(a)  Always autotrophic          (b)  Always heterotrophic (c)   Both (a) and (b)               (d)  None of the above Ans. c (8)

23.

The moment of inertia of a rod of length l about an axis passing through its centre of mass and...
(a)  Fossil pteridophyte (b)  A part of the sporophyte of Funaria (c)   The juvenile phase of the moss gametophyte (d) ...
(a)      Greater than the orbital speed of earth (b)  Less than the orbital speed of earth (c)   Equal to the...
(a)  Spore                                 (b)  Protonema (c)   Columella                          (d)  Paraphysis Ans. c (8)
(a)  Buds (b)  Colourless rhizoids (c)   Oblique septa and discoid chloroplast (d)  All of the above Ans. d   (10)
(a)  Xylem and phloem           (b)  Parenchyma (c)   Collenchyma                     (d)  Xylem Ans. b (31)
(a)  In the epidermis of stem (b)  In the capsule epidermis (c)   In the leaf epidermis (d)  All the above...
(a)  No fruits are produced (b)  No seeds are produced (c)   Antheridia and archegonia are present (d)  Presence of sporophyte...
(a)  Gametophyte is independent of sporophyte (b)  Sporophyte is partly dependent on gameto~phyte (c)   Both (a) and (b) (d)  None...
(a)  Has no roots and stems (b)  Has sporophyte attached to the gametophyte (c)   Is vascular (d)  All the above...
(a)   1.38 cm                                  (b)   3.5 cm (c)   1.75 cm                                  (d)   2.45 cm Answer-b (42)
(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 (11)
(a)      Energy                                       (b)  Angular momen (c)   Linear momentum                   (d)  None of these...
(a)  Paraphysis                        (b)  Oospores (c)   Archegonium                    (d)  Artheridium Ans. c   (9)
(a)  Trabeculae                        (b)  Peristome (c)   Columella                          (d)  Prostomium Ans. d (5)
(a)  Capsule of moss (b)  Gametophyte, archegonia and egg of moss (c)   Gametophyte, antheridia and sperm of moss (d)  Gametophyte...
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