AIPMT 2004
Paper was held on Sun, May 2, 2004 10:00 AM
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Biology

Which of the following statements is not true for retroviruses?
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Phenetic classification of organisms is based on
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A free living nitrogen-fixing cyanobacterium which can also symbiotic association with the water ferm Azolla is
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Viruses that infect bacteria multiply and cause their lysis, are called
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Lichens are well known combination of an alga and a fungus where fungus has
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During replication of a bacterial chromosome DNA synthesis starts from a replication origin site and
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Diversification in plant life appeared
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Angiosperms have dominated the land flora primarily because of their
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In Arthropoda, hend and thorax are often used to form cephalothorax, but in which one of the following classes, is the b
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The animals with bilateral symmetry in young stage, and radial pentamerous symmetry in the adult stage, belong to the Ph
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Presence of gills in the tadpole of frog indicates that
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Uricotelism is found in
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When a fresh-water protozoan possessing a contractile vacuole, is placed in a glass containing marrine water, the vacuol
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One of the following is a very unique feature of the mammalian body
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Edible part of mango is
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Which one of the following enzymes, is copper necessarily associated as an activator?
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In the somatic cell cycle
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If you are provided with root-tips of onion in your class and are asked to count the chromosomes, which of the following
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Which one of the following precedes reformation of the nuclear envelope during M phase of the cell cycle?
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If by radiation all nitrogenase enzyme are inactivated, then there will be no
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In C3 plants, the first stable product of photosynthesis during the dark reaction is
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Plants adapted to low light intensity have
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In glycolysis, during oxidation electrons are removed by
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Cell elongation in internodal regions of the green plants takes place due to
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One set of the plant was grown at 12 hours day and 12 hours night period cycles and it flowered while in the other set n
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The richest sources of vitamin B12 are
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Which one of the following pairs is not correctly matched?
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Duodenum has characteristics Brunner's gland which secrete two hormones called
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Blood analysis of a patient reveals an unusually high quantity of carboxyhaemoglobin content. Which of the following con
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When CO2 concentration in blood increases breathing becomes
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You are required to draw blood from a patient and to keep it in a test tube for analysis of blood corpuscles and plasma.
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In the resting state of the neural membrane, diffusion due to concentration gradients, if allowed, would drive
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Injury to vagus nerve in humans is not likely to affect
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Which one of the following hormones is modified amino acid?
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Chemically hormones are
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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 oogamy, fertilization involves
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When a diploid female plant is crossed with a tetraploid male, the ploidy of endosperm cells in the resulting seed is
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An ovule which becomes curved so that the nucellus and embryo sac lie at right angles to the funicle is
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Anthesis is a phenomenon which refers to
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Ovulation in the human female normally takes place during the menstrual cycle -
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Which of the following hormones is not a secretion product of human placenta -
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In a plant, red fruit (R) is dominant over yellow fruit (r) and tallness (T) is dominant over shortness (t). If a plant
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A male human is heterozygous for autosomal genes A and B and is also hemizygous for hemophilic gene h. What proportion o
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Lack of independent assortment of two genes A and B in fruit fly Drosophila is due to :-
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One of the parents of a cross has a mutation in its mitochondria. In that cross, that parent is taken as a male. During
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A normal woman, whose father was colour-blind is married to a normal man. The sons would be :-
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The recessive genes located on X-chromosomes in humans are always-
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After a mutation at a genetic locus the character of an organism changes due to the change in :-
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During transcription, if the nucleotide sequence of the DNA strand that is being coded is ATACG, then the nucleotide seq
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Which form of RNA has a structure resembling clover leaf ?
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The following ratio is generally constant for a given species :-
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In a mutational event, when adenine is replaced by guanine, it is a case of -
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Age of fossils in the past was generally determined by radio-carbon method and other methods involving radioactive eleme
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What kind of evidence suggested that man is more closely related with chimpanzee than with other hominoid apes ?
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According to oparin, which one of the following was not present in the primitive atmosphere of the earth ?
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Which one of the following is living fossil ?
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Diversification in plant life appeared
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Which one of the following is not correctly matched ?
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India's wheat yield revolution in the 1960s was possible primarily due to :-
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The technique of obtaining large number of plantlets by tissue culture method is called –
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Dough kept overnight in warm weather becomes soft and spongy because of :-
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The most thoroughly studied of the known bacteria-plant interactions is the :-
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Which one of the following pairs is not correctly matched ?
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Restriction endonucleases :-
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In transgenics expression of transgene in target tissue is determined by :-
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DNA fingerprinting refers to :-
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The Ti plasmid is often used for making transgenic plants. This plasmid is found in
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ELISA is used to detect viruses, wherethe key reagent is :-
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Certain characteristic demographic features of developing countries are -
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What is a keystone species ?
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In which of the following pairs is the specific characteristic of a soil not correctly matched ?
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The maximum growth rate occurs in :-
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In which one of the following habitats does the diurnal temperature of soil surface vary most ?
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Which of the following is expected to have the highest value (gm/m2/yr) in a grassland ecosystem ?
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An ecosystem which can be easily damaged but can recover after some time if damaging effect stops will be having -
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In your opinion, which is the most effective way to conserve the plant diversity of an area ?
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In 1984, the Bhopal gas tragedy took place because methyl isocyanate :-
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Lead concentration in blood is considered alarming if it is -
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Common indicator organism of water pollution is :-
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In a longitudinal section of a root, starting from the tip upward, the four zones occur in the following order :-
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Mast cells of connective tissue contain -
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The telomeres of eukaryotic chromosomes consist of short sequences of
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In chloroplasts, chlorophyll is present in the :-
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A major component of gobar gas is
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Chemistry

The maximum number of molecules is present in
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The frequency of radiation emitted when the electron falls from n = 4 to n = 1 in hydrogen atom will be (Given ionizatio
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Ionic radii are
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In a regular octahedral molecule, MX6 the number of X $$-$$ M $$-$$ X bonds at 180o is
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H2O is dipolar, whereas BeF2 is not. It is because
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Among the following, the pair in which the two species are not isostructural is
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In BrF3 molecule, the lone pairs occupy equatorial positions to minimize
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The work done during the expansion of a gas from a volume of 4 dm3 to 6 dm3 against a constant external pressure of 3 at
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Standard enthalpy and standard entropy changes for the oxidation of ammonia at 298 K are $$-$$ 382.64 kJ mol$$-$$1 and $
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If the bond energies of H $$-$$ H, Br $$-$$ Br, and H $$-$$ Br are 433, 192 and 364 kJ mol$$-$$1 respectively, the $$\De
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Considering entropy (S) as a thermodynamic parameter, the criterion for the spontaneity of any process is
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The solubility product of a sparingly soluble salt AX2 is 3.2 $$ \times $$ 10$$-$$11. Its solubility (in moles/L) is
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The rapid change of pH near the stoichiometric point of an acid-base titration is the basis of indicator detection. pH o
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The $$-$$ OH group of an alcohol or the $$-$$ COOH group of a carboxylic acid can be replaced by $$-$$ Cl using
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The molecular formula of diphenyl methane, How many structural isomers are possible when one of the hydrogen is replace
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Using anhydrous AlCl3 as catalyst, which one of the following reactions produces ethylbenzene (PhEt)?
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Reaction of HBr with propene in the presence of peroxide gives
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Which of the following is least reactive in a nucleophilic sibstitution reaction?
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Which one of the following will not form a yellow precipitate on heating with an alkaline solution of iodine?
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Which is the best description of the behaviour of bromine in the reaction given below? H2O + Br2 $$ \to $$ HOBr + HBr
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A solid compound X on heating gives CO2 gas and a residue. The residue mixed with water forms Y. On passing an excess of
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Which one of the following can be oxidised to the corresponding carbonyl compound?
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In a reaction of aniline a coloured product C was obtained. The structure of C would be
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The hormone that helps in the conversion of glucose to glycogen is
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The correct statement in respect of protein haemoglobin is that it
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Number of chiral carbons in $$\beta $$-$$D$$-(+) glucose is
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A sequence of how many nucleotides in messenger RNA makes a codon for an amino acid?
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The helical structure of protein is stablised by
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Which of the following structures represents the peptide chain?
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Which one of the following is a chain growth polymer?
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A compound formed by elements X and Y crystallizes in a cubic structure in which the X atoms are at the corners of a cub
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The standard e.m.f. of a galvanic cell involving cell reaction with n = 2 is found to be 0.295 V at 25oC. The equilibriu
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The rate of a first order reaction is 1.5 $$ \times $$ 10$$-$$2 mol L$$-$$1 min$$-$$1 at 0.5 M concentration of the reac
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The enzyme which hydrolyses triglycerides to fatty acids and glycerol is called
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Which one of the following statements about the zeolite is false?
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Among K, Ca, Fe and Zn, the element which can from more than one binary compound with chlorine is
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Among the following series of transition metal ions, the one where all metal ions have 3d2 electronic configuration is
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lanthanoids are
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Which of the following forms cationic micelles above certain concentration?
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Chloropicrin is obtained by the reaction of
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The radioactive isotope $${}_{27}^{60}$$Co which is used in the treatment of cancer can be made by (n.p) reaction. For t
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Which of the following coordination compounds would exhibit optical isomerism?
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Among [Ni(CO)4], [Ni(CN)4]2$$-$$, [NiCl4]2$$-$$ species, the hybridisation states at the Ni atom are, respectively [Atom
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Considering H2O as a weak field ligand, the number of unpaired electrons in [Mn(H2O)6]2+ will be (atomic number of Mn =
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CN$$-$$ is a strong field ligand. This is due to the fact that
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Which of the following does not have a metal carbon bond?
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In an octahedral structure, the pair of $$d$$ orbitals involved in d2sp3 hybridisation is
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Which of the following is considered to be an anticancer species?
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Physics

The dimensions of universal gravitational constant are
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The unit of permittyvity of free space, $${\varepsilon _0}$$, is
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If $$\left| {\overrightarrow A \times \overrightarrow B } \right| = \sqrt 3 \overrightarrow A .\overrightarrow B $$ the
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A block of mass m is placed on a smooth wedge of inclination $$\theta $$. The whole system is accelerated horizontally s
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The coefficient of static friction, $$\mu $$s, between block A of mass 2 kg and the table as shown in the figure is 0.2.
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A ball of mass 2 kg and another of mass 4 kg are dropped together from a 60 feet ball building. After a fall of 30 feet
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A particle of mass m1 is moving with a velocity v1 and another particle of mass m2 is moving with a velocity v2. Both
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A mass of 0.5 kg moving with a speed of 1.5 m/s on horizontal smooth surface, collides with a nearly weightless spring o
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Three particles, each of mass m gram, are situated at the vertices of an equilateral triangle ABC of side $$l$$ cm (as s
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A wheel having moment of inertia 2 kg m2 about its vertical axis, rotates at the rate of 60 rpm about this axis. The tor
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Consider a system of two particles having masses m1 and m2. If the particle of mass m1 is pushed towards the mass centre
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A round disc of moment of inertia $$I$$2 about its axis perpendicular to its plane and passing through its centre is pl
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The ratio of the radii of gyration of a circular disc about a tangential axis in the plane of the disc and of a circular
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The density of a newly discovered planet is twice that of earth. The acceleration due to gravity at the surface of the p
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If $$\lambda $$m denotes the wavelength at which the radioactive amission from a black body at a temperature TK is max
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The equation of state for 5 g of oxygen at a pressure P and temperature T, when occupying a volume V, will be (where R
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One mole of an ideal gas at an initial temperature of T K does 6R joule of work adiabatically. If the ratio of specific
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Two springs of spring constants k1 and k2 are joined in series. The effective spring constant of the combination is give
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A particle executing simple harmonic motion of amplitude 5 cm has maximum speed of 31.4 cm/s. The frequency of its oscil
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A car is moving towards a high cliff. The driver sounds a horn of frequency $$f$$. The reflected sound heard by the dri
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The phase difference between two waves. represented by y1 = 10$$-$$6 sin[100t + (x/50) + 0.5] m y2 = 10$$-$$6 cos[100t +
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A bullet of mass 2 g is having a charge of 2 $$\mu $$C. Through what potential difference must it be accelerated, starti
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An electric dipole has the magnitude of its charge as q and its dipole moment is p. It is placed in a uniform electric f
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Five equal resistances each of resistances R are connected as shown in the figure. A battery of V volts is connected bet
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when three identical bulbs of 60 watt, 200 volt rating are connected in series to a 200 volt supply, the power drawn by
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The electric resistance of a certain wire of iron is R. If its length and radius are both doubled, then
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In India electricity is supplied for domestic use at 220 V. It is supplied at 110 V in USA. If the resistance of a 60 W
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Resistance n, each of r ohm, when connected in parallel give an equivalent resistance of R ohm. If these resistances we
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A 6 volt battery is connected to the terminals of a three metre long wire of uniform thickness and resistance of 100 oh
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A galvanometer of 50 ohm resistance has 25 divisions. A current of 4 $$ \times $$ 10$$-$$4 ampere gives a deflection of
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To convert a galvanometer into a voltmeter one should connect a
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A coil of 40 henry inductance is connected in series with a resistance of 8 ohm and the combination is joined to the ter
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The magnetic flux through a circuit of resistance R changes by an amount $$\Delta $$$$\phi $$ in a time $$\Delta $$t. Th
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A telescope has an objective lens of 10 cm diameter and is situated at a distance of one kilometer from two objects. The
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The refractive index of the material of a prism is $$\sqrt 2 $$ and its refracting angle is 30o. One of the refracting s
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A beam of light composed of red and green ray is incident obliquely at a point on the face of rectangular glass slab. Wh
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According to Einstein's photoelectric equation, the graph between the kinetic energy of photoelectrons ejected and the f
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If M(A; Z), Mp and Mn denote the masses of the nucleus $${}_Z^AX,$$ proton and neutron respectively in units of u (1 u =
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A nucleus represented by the symbol $${}_Z^AX$$ has
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If in a nuclear fusion process the masses of the fusing nuclei be m1 and m2 and the mass of the resultant nucleus be m3,
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The Bohr model of atoms
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The half life of radian is about 1600 years. Of 100 g of radium existing now, 25 g will remain unchanged after
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The peak voltage in the output of a half wave diode rectifier fed with a sinusoidal signal without filter is 10 V. The d
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In semiconductors at a room temperature
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Of the diodes shown in the following diagrams, which one is reverse biased ?
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The output of OR gate is 1
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