University of Health Sciences, Lahore
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Example of viruses having a polyhedral capsid that is with 252 capsomeres is:
Explanation
Adenovirus is a classic example of a virus with a large icosahedral (polyhedral) capsid composed of 252 capsomeres; the other options are either helical (Tobacco mosaic virus) or different morphologies (bacteriophage has a head-tail structure).
The causative organism of measles is
Explanation
Measles is caused by a paramyxovirus (Measles virus), so option D is correct. The other virus families listed cause different diseases and have different genome/structural properties.
In the life cycle of a bacteriophage, the lysozymes are required in which of the following steps of infection process?
Explanation
Phage lysozymes degrade the bacterial cell wall to allow entry of the phage nucleic acid, so they act during penetration. Adsorption is the initial binding step, genome injection follows penetration but the enzymatic weakening of the cell wall is part of penetration rather than replication.
_______ is transmitted through infected blood and hypodermic syringes.
Explanation
HIV is a blood-borne pathogen commonly transmitted via infected blood and contaminated needles. Influenza and measles are primarily respiratory, and Vibrio cholerae is transmitted fecal-orally.
In Calvin cycle CO2 reacts with RuBP to produce
Explanation
The immediate product of CO2 fixation to RuBP is a short-lived 6-carbon unstable intermediate that quickly splits into two 3-PGA molecules, so option C is the most precise. Saying 3‑PGA (option A) is a downstream result after the unstable intermediate breaks.
Which option is correct about a chlorophyll molecule?
Explanation
The printed answer key lists the chemical formula in option A as correct for the chlorophyll variant referenced. Chlorophyll molecules do contain a porphyrin (tetrapyrrole) ring with a central magnesium coordinated by nitrogens (option B is also a true statement in general), but the official key selects A for this item.
In the journey of electrons from photosystem II to photosystem I plastocyanine is reduced by
Explanation
Electrons pass from the cytochrome b6f complex to plastocyanin, which reduces plastocyanin; plastoquinone transfers electrons earlier and P700 is the reaction center of PSI that receives electrons from plastocyanin. Hence the cytochrome complex is correct.
Enzyme NADP reductase is responsible for:
Explanation
Ferredoxin–NADP+ reductase catalyses the transfer of electrons from reduced ferredoxin to NADP+, producing NADPH, so it reduces NADP+. It does not oxidize NADP+ or reduce P700 directly.
The PS II during light reactions receives electrons from splitting of
Explanation
Photosystem II obtains electrons from the photolysis (splitting) of water, which releases electrons, protons and oxygen. Plastoquinone and plastocyanin are carriers later in the chain and ferredoxin functions at PSI.
Mono-saccharides have a general formula represented by
Explanation
The conventional general formula for monosaccharides is Cn(H2O)n (option A/D as printed), but the official answer key for this paper indicates option B was marked; the item as printed contains ambiguous/duplicated option text on the page, so the answer follows the published key.
163 more questions in this paper
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What is the percentage of H2O in bone cells?
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When glycerol reacts with fatty acid, which type of chemical bond will form?
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Polysaccharides in plants are synthesized by the process of
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Which of the following process Is involved in breakdown of protein into Amino acids?
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The hydrophilic end of phospholplid molecule is polar because of the presence of
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Which monosaccharide will from a gluco pyranose ring in solution?
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Chloroplast are membrane bound bodies containing
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Which of the following is the function of Golgi Complex?
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The nucleus takes dyes due to the presence of
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The organelles only found at seeding stage in oil seed plants are
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Posterior lobe of pituitary produce
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In human myelinated fibers nerve impulse travels at _____ meters per second.
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Nissl's granules are groups of
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During non-conducting state, the neuron membrane is permeable to efflux of
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Which of the following neurotransmitters is lying outside the central nervous system?
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Depolarization during conduction of nerve impulse is due to
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Which of the following is NOT a feature of Autonomic Nervous System?
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Taste receptor is an example of
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Which of the following belongs to chordates
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Which of the following statement is incorrect regarding rate of enzymatic action
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Induced fit model of enzyme activity suggests that an enzyme
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Chromosomal abnormality in Turner syndrome is represented by?
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The change in frequency of alleles at a locus that occurs by chance is known as:
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Identify the correct pair of vestigial organs:
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Which of the following increases variation within a gene pool?
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Which of the following statements about natural selection is not true?
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The formula calculating the frequency of genotypes and alleles in a population gene pool is known as:
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The idea of inheritance of acquired characteristics was presented by:
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According to endosymbiosis theory, flagella may have derived by the ingestion of prokaryotes similar to
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Insulin converts glucose into
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About 70% of the carbon dioxide is carried in blood as:
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Range of normal total lung capacity in humans is
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Respiration in Pseudomonas bacteria is
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Autotrophic mode of nutrition in organism depends upon
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Prokaryotic cells lack
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Bacterial genome becomes diploid:
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One of the following is CORRECT regarding flagella?
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Which option is CORRECT about endospore?
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Bacteria divide at exponential rate during which growth phase?
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Mesosomes are the invagination of bacterial cell structure
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Female reproductive system consists all of the following EXCEPT
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Which one of the following hormone is responsible for the labor pains in human female at the time of birth of baby?
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Fluid secreted by sertoli cells provides liquid medium, protection and nourishment to:
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Corpus luteum during female reproductive cycle produces
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Due to the process of follicle atresia:
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Main function of the epididymis is to:
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Immediate next stage of spermatogonia differentiation is:
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Which of the following is included in paired cranial bones?
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Which of the following skeletal disorder Is an example of autoimmune disorder?
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Which feature is possessed by smooth muscles?
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The accumulation of 'lactic acid' in the muscles results in
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Thick filaments In skeletal muscles are composed of:
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Sarcomere is part of myofibril between:
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Medulla Oblongata is a part of:
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Which of the following is NOT a bone of upper limb?
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Bone forming cells are
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The chromosomes was first observed by;
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Number of moles in an element is directly proportional to:
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The type and relative amount of each isotope in an element can be found by:
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The atomic masses of element depend upon:
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No individual atom in the sample of 1 mole of Neon has a mass of 20.18 a.m.u. because it is:
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The p orbital has
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Which of the following electronic configuration is correct for carbon?
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Intermolecular forces between molecules of ideal gas are
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The correct ideal gas equation is
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The real gases show deviation from ideal behavior at:
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In order to boil water at 110°C, external pressure should be
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Which one of the following DO NOT have tendency to form hydrogen bonding?
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Boiling point of a liquid is a temperature at which:
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Whenever the crystalline solids are broken they do so along definite planes known as:
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One of the following is NOT an example of amorphous solids
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In graphite the carbon atoms are arranged in which of the following structure?
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The principle that states that if a stress is applied to a system at equilibrium the system nullify the effect of stress as far as possible is:
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Identify the CORRECT option required for the maximum yield of ammonia by Haber's process:
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Consider the following reaction in equilibrium and tell addition of which chemical will turn the cloudy solution into clear solution? BiCl3 + H2O <-> BiOCl + 2HCl
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Identify the correct formula to calculate rate of reaction:
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Consider the hypothetical equation aA + bB -> cC+dD: Which of the following represents correct rate equation?
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If a reaction rate does not change with concentration then it is
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Which of the following is CORRECT Arrhenius equation?
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91. In endothermic reaction, the heat content of the
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92. All of the following steps are used to calculate the lattice energy in Born-Haber cycle EXCEPT
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93. The enthalpy change when1 Mole of water is formed by the reaction of acid with an alkali under standard conditions is known as:
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94. Oxidation number of 'Mn' in KMnO4 is
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95. Which step is irrelevant with respect to balancing of redox equations by oxidation number method?
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96. Which of the following is NOT a correct feature of electrolytic cells?
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97. Which of the following has a coordinate bond?
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98. Which of the following is NOT a feature of Valence Shell Electron Pair Repulsion theory?
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99. Which of the following has smallest atomic radius
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100. The difference of lithium from the other alkall metals is mainly because of:
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101. Which of the following is not Basic in nature
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102. The solubility of sulphates of alkaline metals generally
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103. Which of the following is NOT an Alloy
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Electronic configuration of chromium (Proton number 24) is:
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Which of the following is NOT a property of transition elements?
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Which type of isomerism is displayed by compounds having same structural formula but different position of atoms on both sides of carbon bond?
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Which of the following is an example of substituent group which release electrons to benzene ring :
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In Friedel Craft acylation an acyl group is introduced in benzene ring in the presence of catalyst:
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Identify the correct statement related to substitution and elimination of alkyl halides:
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Alkyl Halides involving –C–X bond breakage and –C–Nu bond formation simultaneously would follow which one of the following mechanisms
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CnH2nO is the general formula of:
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The blue color of Fehling solution is changed to red when warmed with an aldehyde due to formation of which of the following?
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Reaction of HCN with formaldehyde is a:
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Which of the following alcohol can give Iodoform reaction?
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Common name of 2-hydroxy propanoic acid is:
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Which of the following is correct regarding phenol
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121. When carboxylic acid are heated with alcohol in the presence of sulphuric acid one of the following is formed
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122. Which one of the following is not an amino acid
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123. In an elastic collision the total kinetic energy
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124. The instantaneous velocity along the curved path is ;
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125. The range of projectile will be maximum if the factor sin2θ becomes
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126.The two dimensional motion under constant acceleration due to gravity is called:
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127. In velocity time graph the area under graph is equal to the:
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According to Newton's Law of Motion the mass of the object is a quantitative measure of its:
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1KWh = _________ J?
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Which of the following is a non-conservative force?
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Work done is equal to:
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When a force of 1N displaces its point of application by 1m in the direction of force, the work done is
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An electric motor is used to lift the weight of 2.0N through a vertical distance of 100 cm in 4 sec. What is the power output of the motor?
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The centripetal acceleration of an object moving along a circle of radius 'r' with an angular speed 'w' is given by the formula:
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An air craft makes a turn in a horizontal circle of radius100m. It is travelling with a velocity of 250m/sec. The angular velocity of the air craft will be:
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A particle of mass 'm' is moving on a circular path of radius 'r' with velocity 'v', then centripetal force acting on it is F. If the velocity of particle increases by 2 times and radius of circular path increases by 4 times then new centripetal force F' will be;
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A roller coaster is moving with 30 ms-1 on a circular track of radius 30m. the net mass of coaster + passengers is 'm' the centripetal force acting on it is:
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Amplitude in the following figure is given as:
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139. Which one of the following is INCORRECT about the nodes when the string is plucked;
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140. In transverse waves the portion above the mean level is called:
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141. Which one of the following does not cause stationary waves?
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142. Select the appropriate Doppler equation when source is approaching the stationary observer where fo is the observed frequency, fs is frequency of source, v is the speed of sound, vs is the speed of source relative to observer
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143. The distance between two successive particles which are exactly in the same state of vibration is called
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144. During the isothermal process, the temperature
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145. What is the value of heat energy (Q) in an adiabatic process?
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146. The Coulomb's law states
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147. The formula V = W / qo represents
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148. The S.I unit of capacitance of a capacitor is:
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149.Electric intensity between two oppositely charge plates in the middle region is_______
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150.Find potential difference in moving 2 C charge which requires 600J of work between two points.
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151.Which one of the following Is NOT a feature of electric forces?
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152.A charge of 90 C passes through a wire for 30 seconds. Then the current in the wire will be:
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153.The magnitude of the current in metals is proportional to the potential difference across it as long as temperature of conductor is kept constant is known as:
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154.When length of copper wire is doubled then resistivity becomes:
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155.The resistance of semi-conductor with rise in temperature
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156.Volt x Ampere is the measure of;
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157.The formula Φ = B.A represents
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158.Which of the following statement is incorrect for any magnetic field lines?
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159.The unit of magnetic flux density is ;
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160.The induced current will flow in such a direction so as to oppose the cause that produces it is statement of:
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161.In an AC generator the emf will be maximum when factor sinωt is equal to
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162.Electric generators and transformers are based on the principles of:
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In an ideal transformer:
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The conversion of A.C into D.C is called rectification and circuit is called rectifier. Which component of electronics acts as a rectifier?
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Full wave rectification is given by:
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A diode characteristic curve is a plot between:
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The value of Planck constant is
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The de-Broglie wavelength associated with a particle moving at 10^6 m/s and having mass 10^-30 kg
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Light propagates through space as a wave is evident by all of the following EXCEPT
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Which series falls in ultra violet region?
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The potential through which an electron should be accelerated , so that,on collision it can lift the electron in the atom from its ground state to some higher state is known as
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Which of the following regarding X Rays is INCORRECT
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The unit of decay constant is ;
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If we have "No" number of any radioactive element then after a period of "n" half-lives the number of atoms left behind is
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Which of the following is NOT the Somatic biological effect of radiation?
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An artificial radioactive element can be made by bombarding
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What does the word "SURPLUS" mean?
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What does the word "ANCESTOR" mean?
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