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Questions asked by balaji.thirumalai
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4474
questions
1
answer selected
(chatquestion)...awhen a stale and Connected in sedies to the batby emf 3v through gulvanometer having 30 divin l00 resistahce is a desistance 2hows fult Scale defection find the figure meh't t of the galvoromees se micooampere.
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telegram-1974
asked
May 29, 2020
1
answer
(chatquestion)...Differentiate between molality and molarity of a solution. What is the effect of change in temperature of a solution on its molality and molarity?
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telegram-1972
asked
May 29, 2020
1
answer
(chatquestion)...by the mudual farce d electorostatic re pulsion? 4 the chaage Ahb radi A and B are hegligible Compared Dto the dei tance 61) Twd insulted charged copper Sphenes A.and B have their Centres separated distance fdenstatic repulsions ol So cm. what ů a on "each is 6is X107c and i) what in the force each Sphode is chagedl above them is halved ? y defulsion double the dis tance bluw amount and the
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telegram-1969
asked
May 28, 2020
1
answer
(chatquestion)...27. In an a.c. circuit, the instantaneous e.m.f. and current are given bye = 100 sin 30 t i-20sin 30t - In one cycle of a.c., the average power consumed by the circuit and the wattless current are, respectively: 50 (1) .0 (2) 50, 0 (3) 50, 10 1000 10 (4)
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telegram-1965
asked
May 28, 2020
1
answer
(chatquestion)...25. The density of a material in the shape of a cube is determines by measuring three sides of the cube and its mass. If the relative errors in measuring the mass and length are respectively 1.5% and 19%, the maximum error in determining the density is: (1) 2.5% (2) 3.5% (3) 4.5% (4) 6%
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telegram-1961
asked
May 28, 2020
1
answer
(chatquestion)...21. A silver atom in a solid oscillates in simple harmonic motion in some direction with a frequency of 10/sec. What is the force constant of the bonds connecting one atom with the other ? (Mole wt. of silver = 108 and Avagadro number 6.02 x 10 gm mole) (1) 2.2 N/m (2) 5.5 N/m (3) 6.4 N/m (4) 7.1 N/m
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telegram-1958
asked
May 28, 2020
1
answer
(chatquestion)...20. The angular width of the central maximum in a single slit diffraction pattern is 60°. The width of the slit is 1 um. The slit is illuminated by monochromatic plane waves. If another slit of same width is made near it, Young's fringes can be observed on a screen placed at a distance of 50 cm from the slits. If the observed fringe width is 1 cm, what is slit separation distance ? (Le. distance between the centres of each slit.) (1) 75yum (2) 100um (3) 25µm (4) 50 um
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telegram-1956
asked
May 28, 2020
1
answer
(chatquestion)...15. A granite rod of 60 cm length is clamped at its middle point and is set into longitudinal vibrations. The density of granite is 2.7x10 kg/m and its young's modulus is 9.27×10"Pa. What will be the fundamental frequency of the longitudinal vibrations ? (1) 10 kHz (2) 7.5 kHz (3) 5 kHz (4) 2.5 kHz
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telegram-1951
asked
May 28, 2020
1
answer
(chatquestion)...12. A parallel plate capacitor of capacitance 90 pF is connected to a battery of emf 20 V. If a dielectric material constant K = is inserted between the plates, the magnitude of the 3 induced charge will be : (1) 2.4 nC (2) 0.9 nC (3) 1.2 nC (4) 0.3 nC
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telegram-1946
asked
May 28, 2020
1
answer
(chatquestion)...10. The reading of the ammeter for a silicon diode in the given circuit is : (1) 11.5 mA (2) 13.5 mA (3) 0 (4) 15 mA
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telegram-1943
asked
May 28, 2020
1
answer
(chatquestion)...2. The mass of a hydrogen molecule is 3.32x10 kg. If 10ª hydrogen molecules strike, per second, a fixed wall of area 2 cm at an angle of 45° to the normal, and rebound elastically with a speed of 10' mis, then the pressure on the wall is nearly: (1) 2.35×10° N/m 2) 4.70×10° N/m² 3) 2.35x10'N/m² 4) 4.70x10'N/m² at a
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telegram-1935
asked
May 28, 2020
1
answer
(chatquestion)...90. According to molecular orbital theory, which of the following will not be a viable molecule ? (1) H; (2) H? (3) H (4) Hes
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telegram-1933
asked
May 28, 2020
1
answer
(chatquestion)...1. A capacitor made of two parallel plates each of the plate A and separation d, is being charged by an external sinusoidal time varying source. Show that, the displacement current inside the capacitor is the same as the current charging the capacitor.
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telegram-1931
asked
May 28, 2020
1
answer
(chatquestion)...7. Dry ice is solid carbon dioxide. A 0.050 g sample of dry ice is placed in an evacuated 4.6 L vessel at 30°C. Calculate the pressure inside the vessel after all the dry ice has been converted to CO2 gas. a) 6.14 atm b) 0.614 atm c) 0.0614 atm d) 6.14 x 10 atm
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telegram-1928
asked
May 28, 2020
1
answer
(chatquestion)...Q. Mictobes Can be used to docrease the use and pesticide can be accomplished. of chemical farhliseos T how this Explain
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telegram-1926
asked
May 28, 2020
1
answer
(chatquestion)...At 27°C a sample of ammonia gas exerts a pressure of 5.3 atm. What is the pressure when the volume of the gas is reduced to one-tenth of the original value at the same temperature? a) 0.53 atm b) 5.3 atm c) 53 atm d) None of these...(Photo from Swarnalatakabi)
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telegram-1924
asked
May 28, 2020
1
answer
(chatquestion)...0- In a particolar apecien, majority of the plant bear purple flowern. Very 'Jew plant have white flowen No intenmediate coloun acic obnerved. If a plant baning giver. you pure pre breed yor the trait? you purple flowena, how wold naentain that it to Explain thin Atatement?
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telegram-1920
asked
May 28, 2020
1
answer
(chatquestion)...Show that the limiting value of The argle f pscism is twice its caitical anglo Hence define Coritical angle 2
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telegram-1910
asked
May 28, 2020
1
answer
(chatquestion)...Question 6. a. What is dry ice? b. Why does BF3 behave as a Lewis acid? c. Carbon forms millions of compounds due to its self-linking property to form long chains and big rings. 1. Name the above property of carbon. 2. Give the reason for the above property of carbon.
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telegram-1907
asked
May 28, 2020
1
answer
(chatquestion)...A thin converging lens has focal length () when illuminated by violet light. State with reason how the focal length of the lens will change if violet light is replaced by red light
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telegram-1903
asked
May 28, 2020
1
answer
(chatquestion)...52 Two cm thick ice layer on surface of a lake is formed in 2 days Additional time required for thickness of ice layer to be 3cm is- (1) 2.50 days (3) 4.50 days (2) 3.75 days (4) 5.75 days
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telegram-1901
asked
May 28, 2020
1
answer
(chatquestion)...Yellow light (A = 6000Å) illuminates a single %3D slit of width 1 x 10-4 m. Calculate (i) the distance between the two dark lines on either side of the central maximum, when the diffraction pattern is viewed on a screen kept 1.5 m away from the slit; (ii) the angular spread of the first diffraction minimum.
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telegram-1897
asked
May 28, 2020
1
answer
(chatquestion)...Correspeonding ind the radian measures to the fallowing degree measuses : 14)-47°30
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telegram-1893
asked
May 28, 2020
1
answer
(chatquestion)...Which part of electromagnetic spectrum has largest penetrating power?
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telegram-1891
asked
May 28, 2020
1
answer
(chatquestion)...78. A straight line through a fixed point (2, 3) intersects the coordinate axes at distinct points P and Q. If O is the origin and the rectangle OPRQ is completed, then the locus of R is: (1) 3x +2y = 6 (2) 2x +3y = xy (3) 3x +2y = xy (4) 3x +2y = 6xy
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telegram-1885
asked
May 28, 2020
1
answer
(chatquestion)...6.Write resonance structures of (a)CH3CO0 (b) CgH;NH2.
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telegram-1883
asked
May 28, 2020
1
answer
(chatquestion)...sin’ xcos² x 74. The integral (sin* x + cos® xsin? x +sin? x cos² x + cos® x) is equal to : 1 (1) 3(1+ tan x) -1 (2) 3(1+ tan" x) +C (3) 1+cot x +C -1 (4) 1+cot x +C
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telegram-1879
asked
May 28, 2020
1
answer
(chatquestion)...> Calculate the mann peicendeicje (CGH6) and cambon tetrqehlon'de ceciA) 1 229 o benzene tn dinnowed im 1ZZ 9 carbon tetrachloride. G1 bencure
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telegram-1877
asked
May 28, 2020
1
answer
(chatquestion)...69. Let A be the sum of the first 20 terms and B be the sum of the first 40 terms of the series 1' +2-2° +3 +2+4 +5° + 2+6° +. If B-2A=100 2, then 2 is equal to: 232 (1) (2) (3) (4) 248 464 496
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telegram-1873
asked
May 28, 2020
1
answer
(chatquestion)...Date Page Q Express the sratios cos A tan A and sec A in Q. teoms / Sin A.
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telegram-1870
asked
May 28, 2020
1
answer
(chatquestion)...Q. 2 Find the range of each of the following functions : V3x2 +1 (1) f(x) = (n (sin-'x) (ii) f(x) = sin-1 5x2 +1...(Plz give working)
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telegram-62422
asked
May 28, 2020
0
answers
(chatquestion)...23. Consider two thin identical conducting wires covered with very thin insulating material. One of the wires is bent into a loop and produces magnetic field B1, at its centre when a current I passes through it. The ratio B : B, is: [Online April 12, 2014] (c) 1:9 (a) 1:1 (b) 1:3 (d) 9:1
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telegram-1864
asked
May 28, 2020
1
answer
(chatquestion)...1. A block of mass 5 kg is at rest on the fixed wedge on the truck, as shown in figure. If truck is moving with constant velocity 2 m/s, then workdone by the friction force on block in first 2 second w.r.t ground is (take g = 10 m/s?) 5 kg →2 m/s 37° (1) 48 J (2) – 96 J (3) – 48 J (4) Zero
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telegram-1860
asked
May 28, 2020
0
answers
(chatquestion)...23. On a large slippery ground, a boy left his dog sitting and walks away with a constant velocity v = 2.0 m/s. When he is xo = 199 m away from the dog, the dog decides to catch him and thereafter move together. The dog cannot develop acceleration more than a = 2.0 m/s? in any direction. In what minimum time will the dog meet the boy?
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telegram-1856
asked
May 28, 2020
0
answers
(chatquestion)...6. =3 11...(Please anybody!?)
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telegram-1853
asked
May 27, 2020
0
answers
(chatquestion)...1- ix 10.91 If 1+ ix = a -- ib and a + b = 1, where a, b eRand i = -1, then x is equal to %3D 2a 26 2a 2b (a) (1+ a)? + b2 (b) (1+ a)? + b² (1+ b)² + a² (d) (1+ b)? + a?
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telegram-1847
asked
May 27, 2020
1
answer
(chatquestion)...25. A train passes a platform with a uniform speed. A boy standing on the platform decides to estimate length of a coach and speed of the train. For this purpose, he first runs with a constant speed of u = 10 km/h in the direction of the motion of the train and passes by a coach in n1= 30 steps. Then he turns back, runs at the same constant speed and passes by a coach in n2 = 20 steps. If the boy covers a distance l = 1.0 m in each step, answer the following questions. (a) What is the speed of the train? (b) What is the length of a coach?...(Photo from Swarnalatakabi)
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telegram-1844
asked
May 27, 2020
1
answer
(chatquestion)...A bell es throun werli calley eufwand at AusSomG Found wthe time interwal When oroses mark 20m
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telegram-1839
asked
May 27, 2020
1
answer
(chatquestion)...2. Sam used to walk to school every morning, and it takes him 20 min. Once on his way, he realized that he had forgotten his homework notebook at home. He knew that if he continued walking to school at the same speed, he would be there 8 min before the bell, so he went back home for the notebook and arrived the school 10 min after the bell. If he had walked all the way with his usual speed, what fraction of the way to school had he covered till the moment he turned back? (a) 8/20 (c) 10/20 (b) 9/20 (d) 12/20
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telegram-1837
asked
May 27, 2020
0
answers
(chatquestion)...IA panticle tals hon. It com idese hewe amas accedertig tamenod so couen looom cdeacceration cembe alsO5ndo)
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telegram-1831
asked
May 27, 2020
1
answer
(chatquestion)...The reading of an ideal voltmeter in the circuit shown is 202 30Ω ww ww 302 202 2V (1) 0.6V (2) OV (3) 0.5 V (4) 0.4 V
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telegram-1829
asked
May 27, 2020
1
answer
(chatquestion)...17. 50 g ice at -20°C is added to 5 g water at 4°C in a thin insulated vessel. The final temperature, is nearly- (1) 2°C (3) -2°C 2001 (2) 0°C (4) -10°C
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telegram-1825
asked
May 27, 2020
1
answer
(chatquestion)...13 IF AD I BC Prone that AB?+ cD?
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telegram-1821
asked
May 27, 2020
1
answer
(chatquestion)...7. A small metal ball is being pulled gradually on a fixed frictionless hemisphere as shown in the figure. Radii of the ball and that of the pulley are much smaller than that of the hemisphere. As the ball slides from the bottom to a position close to the top of the hemisphere, how do. the magnitudes of pulling force F and contact force R between the ball and the hemisphere change? (a) F increases and R decreases. (b) F decreases and R increases. (c) F decreases and R remains unchanged. (d) F remains unchanged and R decreases.
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telegram-1819
asked
May 27, 2020
1
answer
(chatquestion)...19. For a certain body, the velocity-time graph is shown in the figure. The ratio of applied forces for interval AB and BC is D (а) + 2 (b) - 60° 30° 1 (c) 1 (d) t + 3 A B C
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telegram-1816
asked
May 27, 2020
1
answer
(chatquestion)...10 gm of ice at -20°C is dropped into a calorimeter containing 10 gm of water at 10°C; the specific heat of water is twice that of ice. When equilibrium is reached , the calorimeter will contain
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telegram-1812
asked
May 27, 2020
1
answer
(chatquestion)...8. Which of the following graph represents non accelerate uniform motion (а) (b) (d) t
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telegram-1796
asked
May 27, 2020
1
answer
(chatquestion)...A particle is moving eastwards with velocity of 5 m/s. In 10 sec the velocity changes to 5 m/s northwards. The average acceleration in this time is (a)Zero (b) m/s? toward north-west (c) m/s toward north-east - m/s toward north-west
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telegram-1787
asked
May 27, 2020
1
answer
(chatquestion)...(b) A liquid of specific gravity 0.85 flows from B to A as shown in Figure Q2 (b). If h is 10.5 cm and the pressure at A and B are 170 kPa and 275 kPa respectively. Determine the friction head loss in meters of liquid. [5mks] А Figure Q2 (b)...(Can I get some help for this question please)
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telegram-62419
asked
May 26, 2020
0
answers
(chatquestion)...Do the points (3, 2), (-2, -3) and (2, 3) form a triangle? If so, r gle formed.
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telegram-1781
asked
May 26, 2020
1
answer
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