AIPMT 2003
Paper was held on Sun, May 4, 2003 10:00 AM
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Biology

Species are considered as
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Biosystematics aims at
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Phenetic classification of organisms is based on
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Chromosomes in a bactertial cell can be 1 $$-$$ 3 in number and
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Tobacco mosaic virus is a tubular filament of size
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Which one of the following statements about viruses is correct?
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Viruses are no more ''alive'' than isolated chromosomes because
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In which kingdom would you classify the archaea and nitrogen-fixing organisms, if the five-kingdom system of classificat
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Which one of the following pairs of plants are not seed producers?
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Sexual reproduction in Spirogyra is an advanced feature because it shows
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Plants reproducing by spores such as mosses and ferns are grouped under the general term
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Which one pair of examples will correctly represent the grouping spermatophyta according to one of the schemes of classi
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Bartholin's glands are situated
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The chief advantage of encystment of an Amoeba is
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Systemic heart refers to
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Sycon belongs to a group of animals, which are best described as
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During the life-cycle, Fasciola hepatica (liver fluke) infects its intermediate host and primary host at the following l
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Ommatidia serve the purpose of photoreception in
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Which one of the following is a matching pair of an animal and a certain phenomenon it exhibits?
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Given below are four matchings of an animal and its kind of respiratory organ : (A)  Silver fish  &
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Juicy hair-like structures observed in the lemon fruit develop from
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The major role of minor elements inside living organisms is to act as
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Stomata of a plant open due to
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Boron in green plants assists in
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Gray spots of oat are caused by deficiency of
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Which element is located at the centre of the porphyrin ring in chlorophyll?
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In sugarcane plant 14CO2 is fixed to malic acid, in which the enzyme that fixes CO2 is
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Stomata of CAM plants
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Which one of the following is wrong in relation to photorespiration?
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Which fractions of the visible spectrum of solar radiations are primarily absorbed by carotenoids of the higher plants?
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Which one of the following concerns photophosphorylation?
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In alcohol fermentation
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In which one of the following do the two names refer to one and same thing?
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Plants deficient of element zinc, show its effect on the biosynthesis of plant growth hormone
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Differentiation of shoot is controlled by
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Nicotiana sylvestris flowers only during long days and N.tabacum flowers only during short days. If raised in the labora
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Which one of the following pairs is not correctly matched?
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During prolonged fastings, in what sequence are the following organic compounds used up by the body?
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The cardiac pacemaker in a patient fails to function normally. The doctors find that an artificial pacemaker is to be gr
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Bundle of His is a network of
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In the ABO system of blood groups, if both antigens are present but no antibody, the blood group of the individual would
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If Henle's loop were absent from mammalian nephron, which one of the following is to be expected?
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What used to be described as Nissl's granules in a nerve cell are now identified as
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Which one of the following pairs correctly matches a hormone with a disease resulting from its deficiency?
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In a flowering plant, archesporium gives rise to
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During embryonic development, the establishment of polarity along anterior/posterior, dorsal/ventral or medial/lateral a
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Test tube baby means a baby born when
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Two opposite forces operate in the growth and development of every population. One of them relates to the ability to rep
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Which one of the following traits of garden pea studied by Mendel was a recessive feature ?
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The genes controlling the seven pea characters studied by Mendel are now known to be located on how many different chrom
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Two crosses between the same pair of genotypes or phenotypes in which the sources of the gametes are reversed in one cro
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Pattern baldness, moustaches and beard in human males are examples of : -
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In Drosophila, the sex is determined by : -
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Down's syndrome is caused by an extra copy of chromosome number 21. What percentage of offspring produced by an affected
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Which one of the following conditions though harmful in itself, is also a potential saviour from a mosquito borne infect
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During transcription, the DNA site at which RNA polymerase binds is called :-
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In the genetic code dictionary, how many codons are used to code for all the 20 essential amino acids : -
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What does "lac" refer to in what we call the lac operon ?
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During translation initiation in prokaryotes, a GTP molecule is needed in : -
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What would happen if in a gene encoding a polypeptide of 50 amino acids, 25th codon (UAU) is mutated to UAA ?
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Which one of the following triplet codes, is correctly matched with its specificity for an amino acid in protein synthes
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Degeneration of a genetic code is attributed to the : -
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Convergent evolution is illustrated by : -
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Which one of the following sequences was proposed by Darwin and Wallace for organic evolution ?
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Random genetic drift in a population probably results from
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Industrial melanism is an example of : -
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In a random mating population in equilibrium, which of the following brings about a change in gene frequency in a non-di
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Darwin in his 'Natural Selection Theory' did not believe in any role of which one of the following in organic evolution
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Which one of the following is categorised under living fossils ?
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Which one of the following describes correctly the homologous structures ?
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Carcinoma refers to : -
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Short-lived immunity acquired from mother to foetus across placenta or through mother's milk to the infant is categorise
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Christmas disease is another name for : -
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Which of the following plants are used as green manure in crop fields and in sandy soils ?
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Maximum application of animal cell culture technology today is in the production of : -
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During anaerobic digestion of organic waste, such as in producing biogas, which one of the following is left undergraded
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In recent years, DNA sequences (nucleotide sequence) of mt-DNA and Y chromosomes were considered for the study of human
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Which one of the following bacteria has found extensive use in genetic engineering work in plants ?
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ELISA is used to detect viruses, wherethe key reagent is :-
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Mycorrhiza is an example of :-
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Which group of vertebrates comprises the highest number of endangered species ?
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Which endangered animal is the source of the world's finest, lightest, warmest and most expensive wool - the shahtoosh ?
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Fluoride pollutions mainly affects : -
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Escherichia coli is used as an indicator organism to determine pollution of water with ;-
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The apical meristem of the root is present
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In which one of the following nitrogen is not a constituent ?
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The aleurone layer in maize grain is specially rich in :-
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Chlorenchyma is known to develop in the : -
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Diffuse porous wood is characteristics of those plants which are growing in : -
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The cells of the quiescent centre are characterised by : -
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Which one of the following contains the largest quantity of extracellular material ?
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Cellular totipotency is demonstrated by :-
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Coconut milk factor is
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Chemistry

The velocity of Planck's constant is 6.63 $$ \times $$ 10$$-$$34 J s. The velocity of light is 3.0 $$ \times $$ 108 m
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The ions O2$$-$$, F$$-$$, Na+, Mg2+ and Al3+ are isoelectronic. Their ionic radii show
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Which one of the following statements is not correct for sigma- and pi- bonds formed between two carbon atoms?
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For the reaction, C3H8(g) + 5O2(g) $$ \to $$ 3CO2(g) + 4H2O(l) at constant temperature, $$\Delta $$H $$-$$ $$\Delt
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The densities of graphite and diamond at 298 K are 2.25 and 3.31 g cm$$-$$3, respectively. If the standard free energy d
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Formation of solution from two components can be considered as (i) Pure solvent $$ \to $$ separated solvent m
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What is the entropy change (in J K$$-$$1 mol$$-$$1) when one mole of ice is converted into water at 0oC? (The enthalpy c
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For which one of the following equations is $$\Delta $$Horeact equal to $$\Delta $$Hof for the product ?
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The molar heat capacity of water at constant pressure, C, is 75 J K$$-$$1 mol$$-$$1. When 1.0 kJ of heat is supplied to
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The equilibrium constants of the following are N2 + 3H2 $$\rightleftharpoons$$ 2NH3;     K1 N2
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Which one of the following statements is not true?
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In Haber process 30 litres of dihydrogen and 30 litres of dinitrogen were taken for reaction which yielded only 50% of t
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The reaction quotient (Q) for the reaction N2(g) + 3H2(g) $$\rightleftharpoons$$ 2NH3(g) is given by $$Q = {{{{\left[
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The solubility product of AgI at 25oC is 1.0 $$ \times $$ 10$$-$$16 mol2 L$$-$$2. The solubility of AgI in 10$$-$$4 N so
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Name of the compound given below is
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Which one of the following orders of acid strength is correct ?
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The compound on reaction with NaIO4 in the presence of KMnO4 gives
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Which one of the following is a free-radical substitution reaction ?
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The correct order of reactivity towards the electrophilic substitution of the compounds aniline (I), benzene (II) and ni
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Which of the following pairs of compounds are enantiomers?
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The oxidation states of sulphur in the anions SO3$${_3^{2 - }}$$, S2O$${_4^{2 - }}$$ and S2O$${_6^{2 - }}$$ follow t
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The structure of H2O2 is
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In this reaction : CH3CHO + HCN $$ \to $$ CH3CH(OH)CN           &nbsp
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$$A$$ and $$B$$ in the following reactions are :
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When $$m$$-chlorobenzaldehyde is treated with 50% KOH solution, the product(s) obtained is (are)
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In a set of the given reactions, acetic acid yielded a product C. Product $$C$$ would be
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The final product C, obtained in this reaction would be
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Glycolysis is
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Vitamin B12 contains
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Chargaff's rule states that in an organism
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Phospholipids are esters of glycerol with
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Acrilan is a hard, horny and a high melting material. Which one of the following represents its structure?
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Which one of the following monomers gives the polymer neoprene on polymerization?
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The pyknometric density of sodium chloride crystal is 2.165 $$ \times $$ 103 kg m$$-$$3 while its X-ray density is 2.178
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The e.m.f. of a Daniell cell at 298 K is E1. When the concentration of ZnSO4 is 1.0 M and that of CuSO4 is 0.01 M, the
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On the basis of the information available from the reaction, 4/3Al + O2 $$ \to $$ 2/3Al2O3,   $$\Delta $$G =
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The temperature dependence of rate constant (k) of a chemical reaction is written in terms of Arrhenius equation, $$k =
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If the rate of the reaction is equal to the rate constant, the order of the reaction is
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The reaction A $$ \to $$ B follows first order kinetics. The time taken for 0.8 mole of A to produce 0.6 mole of B is 1
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The activation energy for a simple chemical reaction A $$\rightleftharpoons$$ B is E$$a$$ in forward direction. The acti
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According to the adsorption theory of catalysis, the speed of the reaction increases because
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Which one of the following compounds is not a protonic acid?
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The method of zone refining of metals is based on the principle of
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Which one of the following characteristics of the transition metals is associated with their catalytic activity?
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The basic character of the transition metal monoxides follows the order (Atomic no's. Ti = 22, V = 23, Cr = 24, Fe = 26)
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The correct order of ionic radii of Y3+, La3+, Eu3+ and Lu3+ is (Atomic nos. Y = 39, La = 57, Eu = 63, Lu = 71)
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The radioistope, tritium ($${}_1^3$$H) has a half-life of 12.3 years. If the initial amount of tritium is 32 mg, how man
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The number of unpaired electrons in the complex ion [CoF6]3$$-$$ is (Atomic no. : Co = 27)
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Among the following which is not the $$\pi $$-bonded organometallic compound?
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Physics

If a ball is thrown vertically upwards with speed u, the distance covered during the last t seconds of its ascent is
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A man throws balls with the same speed vertically upwards one after the other at an interval of 2 seconds. What should b
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The vector sum of two forces is perpendicular to their vector differences. In that case, the forces
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A particle moves along a circle of radius $$\left( {{{20} \over \pi }} \right)$$ m with constants tangential acceleratio
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A man weight 80 kg. He stands on a weighting scale in a lift which is moving upwards with a uniform acceleration of 5 m
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A monkey of mass 20 kg is holding a vertical rope. The rope will not break when a mass of 25 kg is suspended from it bu
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When a long spring is stretched by 2 cm, its potential energy is U. If the spring is stretched by 10 cm, the potential e
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A stationary particle explodes into two particles of masses m1 and m2 which move in opposite directions with velocities
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A ball rolls without slipping. The radius of gyration of the ball about an axis passing through its centre of mass is K.
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A stone is tied to a string of length $$l$$ and is whirled in a vertical circle with the other end of the string as the
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A solid cylinder of mass M and radius R rolls without slipping down an inclined plane of length L and height h. What is
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A thin circular ring of mass M and radius r is rotating about its axis with a constant angular velocity $$\omega $$. Fou
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Two spheres of masses m and M are situated in air and the gravitational force between them is F. The space around the ma
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The acceleration due to gravity on the planet A is 9 times the acceleration due to gravity on planet B. A man jumps to a
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A body of mass m is placed on earth's surface which is taken from earth surface to a height of h = 3R, then change in gr
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Consider a compound slab consisting of two different materials having equal thicknesses and thermal conductivities K and
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An ideal gas heat engine operates in a Carnot cycle between 227oC and 127oC. It absorbs 6 kcal at the height temperature
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Which one of the following statements is true for the speed v and the acceleration a of a particle executing simple harm
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The potential energy of a simple harmonic oscillator when the particle is half way to its end point is
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A particle of mass m oscillates with simple harmonic motion between points x1 and x2, the equilibrium position being O.
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In case of a forced vibration, the resonance peak becomes very sharp when the
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The time period of mass suspended from a spring is T. If the spring is cut into four equal parts and the same mass is su
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An observer moves towards a stationary source of sound with a speed 1/5th of the speed of sound. The wavelength and freq
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Three capacitors each of capacity 4 $$\mu $$F are to be connected in such a way that the effective capacitance is $$6\mu
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A charge q is located at the centre of a cube. The electric flux through any face is
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Two 220 volt, 100 watt bulbs are connected first in series and then in parallel. Each time the combination is connected
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Fuse wire is a wire of
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In a Wheatstone's bridge all the four arms have equal resistance R. If the resistance of the galvanometer arm is also R,
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An electric kettle has two heating coils. When one of the coils is connected to an a.c. source, the water in the kettle
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A long solenoid carrying a current producess a magnetic field B along its axis. If the current is doubled and the number
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A charged particle moves through a magnetic field in a firection perpendicular to it. Then the
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A diamagnetic material in a magnetic field moves
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According to Curie's law, the magnetic susceptibility of a substance at an absolute temperature $$T$$ is proportional to
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A bar magnet is oscillating in the Earth's magnetic field with a period T. What happens to its period and motion if its
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Which of the following rays are not electromagnetic waves ?
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We consider the radiation emitted by the human body. Which one of the following statements is true?
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A convex lens is dipped in a liquid whose refractive index is equal to the refractive index of the lens. Then its focal
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An equiconvex lens is cut into two halves along (i) XOX' and (ii) YOY' as shown in the figure. Let $$f,f',$$ $$f''$$
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A photoelectric cell is illuminated by a point source of light 1 m away. When the source is shifted to 2 m then
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J.J. Thomson's cathode-ray tube experiment demonstrated that
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An electron is moving round the nucleus of a hydrogen atom in a circular orbit of radius r. The Coulomb force $$\overrig
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Solar energy is mainly caused due to
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The volume occupied by an atom is greater than the volume of the nucleus by a factor of about
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A sample of radioactive element has a mass of 10 g at an instant t = 0. The approximate mass of this element in the samp
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The mass of proton is 1.0073 u and that of neutron is 1.0087 u (u = atomic mass unit). The binding energy of $${}_2^4$$
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The mass number of a nucleus is
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In which of the following systems will the radius of the first orbit (n = 1) be minimum ?
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A nuclear reaction given by ZXA $$ \to $$ z+1YA + $$-$$1e0 + $$\overline v $$ represents
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Reverse bias applied to a junction diode
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A n-p-n transistor conducts when
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If a full wave rectifier circuit is operating from 50 Hz mains, the fundamental frequency in the ripple will be
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Barrier potential of a p-n junction diode does not depened on
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