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Questions asked by balaji.thirumalai

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(chatquestion)...2) Interference fringes will be brighter (3) Fringes will not be obtained (4) Contrast between bright and dark fringes increases In a Young's double slit experiment, the intensity at the central maximum is /9. The intensity at a distance B/4 from the central maximum is (B is fringe width) 18. (1) o (2) 2 (3) V2 (4) 4

asked Mar 5, 2020

0 answers

(chatquestion)...A Zener diode having breakdown voltage equal to 15 V, is used in a voltage regulator circuit. The current through the diode is 250 2 20 V Aa 15 V 1 k2 Medica (1) 5 mA (2) 10 mA (3) 15 mA (4) 20 mA www (Divisi

asked Mar 5, 2020

0 answers

(chatquestion)...marking. page of the booklet. Submit both the question paper and the booklet for ng the correct option in the question paper and co Use the following information to answer questions I to 3. A random sample of 28 FUPRE students read a mean of 1.2 book- TYPE A in a month. 1. At 0.05 level of significance, determine the calculated valục mean number of books read per month is less than 2 (a)-0.8 ition of 2.14 books e claim that the 01 2. The table value for this test is (b) 0.80 (c) 1.98 (d)-1.98 (a) 1.96 3. The decision for the hypothesis is (a) Reserve judgment 4. The variance of a set of data is 40, what is the variance if each element of the data is divided by 2 (a) 40 S. The variance of a set of data is 30, what is the variance if 2 is subtracted from each element of the data (a) 60 Use the following information to answer questions 6 to 8. The mean price of a dozen roses at Shoprite from a random sample of size 30 is 48.33 with S = 6.07. 6. The calculated value of the statistic for testing the claim that the mean price is higher than 45 at a =1° (a) 3.33 7. What is the table value for this test (a) 1.96 8. What is the decision for the hypothesis (a) Reserve judgment (b) 1.65 (c) 2.252 (d) 1.703 (b) Accept Ho (c) Cannot reject Ho (d) Reject Ho (b) 10 (c) 160 (d) 80 (b) 30, (c) 90 (d) 120 (b) 3.0 (c) 1.11 (d) 2.54 (b) 2.33 (c) 1,64 (d) 2.58 (b) Reject Ho (c) Cannot reject Ho (d) Accept Ho %3D bottles, x= 74.3 cl was found. Construct a 95% confidence interval for u (a) (71.64, 76.96)(b) (71.85, 76.75) (c) (-71.64,76.96) (d) (-71.85,76.75) 9. The volume of wine filled by a bottling machine is normally distributed with o = 5 cl. In a sar 10. The 95% confidence interval for a data set with n = 34,x = 3.54,S = 0.13 is (d) (-3:40, 3.50) %3D (c) (3.40, 3.50) (a) (3.50, 3.58) (b) (-3.50, 3.58) llowing information to answer questions 11 to 13. 35 S = 1.2, n2 = 50. between the two sam...(Please number 4 and 5 I need explanation on it please)

asked Mar 5, 2020

0 answers

(chatquestion)...4. If B, B,, B, and B are the magnetic fields due to currents I,, 1, la and l respectively, then in Ampere's circuital law B.di = u,l, B is %3D 13 6o. 40 (1) B =B, + B, (2) B = B, + B, (3) B=B, + B, +B, +B, ( B= B,-B,...(Anyone ?)

asked Mar 5, 2020

1 answer

(chatquestion)...39 Organic Chemistry - Some Basic Principles and Techniques 53. In the given reaction OH A (major) NH, NO, B (major) HO. A and B are respectively OH NO, (1) and NH, CHO. Он NO, CI (2) • and NH2 HO, ОН NO2 (3) and NH, ОН ОН NO, wards and (4) NH, ОН CI CI 54. The least reactive alkene towards dil. HCI is

asked Mar 4, 2020

0 answers

(chatquestion)...93. The substance that has the lowest boiling point is: (b) H2S (c) PH3 (d) SİH4 (a) HCI 94. Which of the following molecule can show Lewis acidity? (1) CO2 (V) NMe 3 (а) Ш, IV (II) Br2 (III) SnCl, (IV) HF (Ъ) 1, 1, ш (с) 1, Ш, IV (d) п, I, V s poler bonds but the molecule as a whole is polar....(Aise ques kaise solve krte h)

asked Mar 4, 2020

0 answers

(chatquestion)...19 The radical, CH2 is aromatic because it has (a) 7 p-orbitals and 7 unpaired electrons (b) 6 p-orbitals and 7 unpaired electrons (c) 6 p-orbitals and 6 unpaired electrons (d) 7 p-orbitals and 6 unpaired electrons....(Hai kya koi khiladi)

asked Mar 4, 2020

0 answers

(chatquestion)...Which of the following has maximum energy (1) 111 3s 3p 3d 3d நான்பர்ன 1211111 (2) 3s 3p (3) 1111L 1 3d శ్రంయం 0ా 3s 3p 3d (4) 11111||

asked Mar 4, 2020

0 answers

(chatquestion)...32περ R 32περR 34. The intensity of light pulse travelling in an 34. किसी प्रकाशीय तंतु में संचरित प्रकाश स्पंद की तीव्रता optical fiber decreases according to the relation I Ie Ux The intensity of light is reduced to 20 % of its initial value after a distance x equal to समीकरण I = 1,ets के अनुसार घटती है। कितनी दूरी x तय करने के बाद, प्रकाश की तीव्रता घटकर प्रारम्भिक तीव्रता की 20% हो जायेगी ? »(-) (1) In (2) In(a) (1) In (2) In(a) (In5) (3) (4) In (In5) (3) (4) In

asked Mar 4, 2020

0 answers

(chatquestion)...32περ R 32περR 34. The intensity of light pulse travelling in an 34. किसी प्रकाशीय तंतु में संचरित प्रकाश स्पंद की तीव्रता optical fiber decreases according to the relation I Ie Ux The intensity of light is reduced to 20 % of its initial value after a distance x equal to समीकरण I = 1,ets के अनुसार घटती है। कितनी दूरी x तय करने के बाद, प्रकाश की तीव्रता घटकर प्रारम्भिक तीव्रता की 20% हो जायेगी ? »(-) (1) In (2) In(a) (1) In (2) In(a) (In5) (3) (4) In (In5) (3) (4) In

asked Mar 4, 2020

0 answers

(chatquestion)...26. यदि 6 न्यूनकोण हो तथा tan 6 = y6+V6+\6+.... हो, तो %3D sec0 का मान है- (1) 6 (2) 10 ৪ (3) से इकी (4) 9. ा

asked Mar 4, 2020

1 answer

(chatquestion)...22 D 'D 2-sin a-cos a 33. is equal to sin a-cos a TC b. cos 8. a. sec TC d. cot 2. C. tan 8. R00 8/2 8/2

asked Mar 4, 2020

0 answers

(chatquestion)...15. The gaseous product of the reaction between Sn and conc. H,SO, is: (a) H2 (c) SnH4 16. The dehydration of malonic acid CH2(COOH)2 with P4010 gives: (b) SO 2 (d) SO 3 (a) carbon monoxide (c) carbon dioxide (b) carbon suboxide (d) all three

asked Mar 4, 2020

0 answers

(chatquestion)...(3y 21 J (4) 42 J 23. Two masses m and 2 m are attached to two ends of an ideal spring as shown in figure. When the spring is in the compressed state, the energy of the spring is 60 J, If the spring is released, then at its natural length 2m (1) energy of smaller body will be 20 J pulled (2) energy of smaller body will be 40 J shown (3) energy of smaller body will be 10 J (4) energy of smaller body will be same 24. Two inclined frictionless tracks, one gradual and the other steep meet at A from where two stones are allowed to slide doen from rest, one on each track as shown in figure. Which of the following statement is correct ? (1) Both the stones reach the bottom with the same ction of speed not with the same speed and j (2) Both the stones reach the bottom with the same will be speed and stone I reaches the bottom earlier than stone II (3) Both the stones reach the bottom with the same speed and stone Il reaches the bottom earlier than stone I (4) Both the stones reach the bottom at different times and with different speeds Pane # 5...(23 and 24. With explanation)

asked Mar 4, 2020

0 answers

(chatquestion)...Usino ouy After 2 sec of ProjectioA velocity makes angle 30° cwith Hori zont al 4ter 3 sec of Projectibin velocity Bocomes Horizontal Galculate velocit of Projection & Angle of projection:

asked Mar 4, 2020

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(chatquestion)...2 Formation of covalent bonds in compounds exhibits [2002] (a) wave nature of electron (b) particle nature of electron 6. (c) both wave and particle nature of electron (d) none of these

asked Mar 4, 2020

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(chatquestion)...12. Isoelectric point of following zwitter ion is NH,-CH-COOH pK, = 4.2 CH, pK, = 9.6 | (1) 5.9 (2) 4.9 (3) 4.3 (4) 6.9

asked Mar 4, 2020

0 answers

(chatquestion)...f) C6HSNH2...(Write the IUPAC name)

asked Mar 3, 2020

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(chatquestion)...Blood 2 26 minutes ago Dste B. Erample 9. D. 3 E. 10. A.11 B.10 C. 8 D. 9 E.12 8. Stup REPLY כ 5. 2....(Help)

asked Mar 3, 2020

0 answers

(chatquestion)...एज़ाम उतनी बड़ी चीज़ नहीं, जितना इसे बना दिया गया है। यह तो सफर का एक हिस्सा है, जिससे पता चलता है कि आपकी काबिलियत किसमें है। अनीता करवल सीबीएसई चेयरपर्सन

asked Mar 3, 2020

0 answers

(chatquestion)...Read the following write up carefully and answer the following questions: f: R R, f (x) is a differentiable function such that all its successive derivatives exist. f'(x) can be zero at discrete points only and f(x) f"(x) <0 X e R. If f (a) = 0, then which of the following is correct (A) f(a + h) f"(a - h) < 0 (C) f(a + h) f" (a - h) < 0 (B) f (a + h) f" (a - h) > 0 (D) f' (a + h) f" (a -h) < 0 5. If a and B are two consecutive roots of f (x) = 0, then (A) f"(y) = 0 (C) f"(y) = 0 y e (a, B) y e (a, B) (B) f"(?) = 0 (D) f"(7) = 0 ye (a, B) YE (a, B) MATCH LIST TYPE tehing lists. The codes f

asked Mar 3, 2020

0 answers

(chatquestion)...MATCH FOLLOWING TYPE Each question contains statements given in two columns which have to be matched. Statements (A, B.C D) in column I have to be matched with statements (p, q. r, s, t) in column II. e (0, 1) and p and q are coprime to each D. 1. A rational number is given in the form : p, qe l; other. Now match the following: Column-l Column-1 (p) 128 (A) (B) pq 30!, then number of ordered pairs (p, q) are greater than pq 101, then number of ordered pairs (p, q) are less than 6. pq 201, then number of ordered pairs (p, q) are equal to 621 (0) (s) (0) (C) %3D 2050 (D) pq 40!, then number of ordered pairs (p, q) are greater than 500...(Can anyone please help in this)

asked Mar 3, 2020

0 answers

(chatquestion)...A 4% solution (wlw) of sucrose (M = 342 g mol-) in water has a freezing point of 271.15 K. Calculate the freezing point of 5% glucose (M = 180 g mol) in water. (Given : Freezing point of pure water 273.15 K) Delhi 2019

asked Mar 3, 2020

1 answer

(chatquestion)...(c) resultant intensity in terms of the mton 34. Two objects P and Q when placed at different positions in front of a concave mirror of focal length 20 cm, form real images of equal size, Size of object P is three times size of object Q. If the distance of P is 50 cm from the mirror, find the distance of Q from the mirror. 3

asked Mar 3, 2020

0 answers

(chatquestion)...39 Under the same condition heats of formation of water & CO, are -285 and -394 kJ mol-1 respectively. The heat of combustion of methane is -890 kJ mol-1. The heat of formation of methane (in kJ mol-1) is (1) -964 (2) -890 (3) -222 AY-74 of a mono Lung...(Plz solve)

asked Mar 2, 2020

0 answers

(chatquestion)...182 H. The vapor pressures of chlorobenzene and water different temperatures are t/°C 90 100 110 P°($Cl)/mm Hg P°(H,O)/mm Hg At what temperature will oCI undergo stean- distillation under a total pressure of 800 mmHg (Assueme V.P. of liquids change linearly) 204 289 402 526 760 1075 (a) z 95°C (b) 92°C (c) 94°C (d) z 89°C...(Anyone ?)

asked Mar 2, 2020

0 answers

(chatquestion)...71 Match the column (for B,H):- ALLEN Column-I 71. (В,Н. Column-II Maximum atom in same (a) plane (P) 0. (a) (b) | ЗC-4е bonds (b) (Q) Maximum replacable (c) H-atoms (c) (R) 6. To complete the octet (d) of l'B' atom e required (d) (S) (1) a-S, b-P, c-Q, d-R (1) a-R, b-P, c-S, d-Q (2) (3) a-R, b-S, c-P, d-Q (3) (4) a-P, b-Q, c-R, d-S (4 कि The solubility of a specific non-volatile salt is 4g 72. में in 100g of water at 25°C. If 2.0g, 4.0g and 6.0g of the salt is added to 100g of water at 25°C in system x, y, z respectively. The vapour pressure would be in order:- (1) x<y<z x>y>z (3) z>x=y JAY x>y =z Among following molecules N-Si bond length is 73. shortest ? (1) N(SiH,); (2) NH(SiH,), 2-6-71 (2) NH,(SiH,) (4) All have equal N-Si bond length The product of I with Mno in alkaline 74. 4-

asked Mar 2, 2020

0 answers

(chatquestion)...Cos ec40 2. If olies between 0 and - the range of 4 cot 0 + tan? 0 is (Assume sin20 = 2sin 0 cose) %3D a) (0, 1) b) (0, 2) c) ,2 1 5 d) 2'2

asked Mar 2, 2020

0 answers

(chatquestion)...171.Somaclonal variation is seen in a) Tissue culture grown plants b)Apomicts c) Polyploids d)Vegetatively propagated plants 172 Treatment of a genetic diserder by...(Hlp)

asked Mar 2, 2020

0 answers

(chatquestion)...dx -1 = a" sin п 6. V2ax - x 2 The value of n is (a) 0 (b) –1 bas (c) 1 (d) none of these. aboe You may use dimensional analysis to solve the problem. ४| 8

asked Mar 2, 2020

1 answer

(chatquestion)...Write the terms of 4m³n²+5m and using factor tree write factors for each term From the given figure, find the measure of ZCAM and ZABM if AABM E AACM. Q4. 20 ssion 3b2 +nb +5 for b%D

asked Mar 2, 2020

0 answers

(chatquestion)...two aluminium wires have their lengths in the ratio 2:3 and radii in the ratio 1:3. These are connected in parallel across a battery of emf E and of negligible internal resistance. Find the ratio of drift velocities of the electrons in the two wires.

asked Mar 2, 2020

0 answers

(chatquestion)...48 • Optics and Modern Physics Type 6. To find a rough image of a square or rectangular type of object kept along the axis Concept (i) If object is towards Por C, then its image is also towards P or C. (ii) If object is towards F, then its image is towards infinity and it is more magnified Slu O Example 7 A square mnqp is kept between F and C on the principal axis of a concave mirror as shown in figure. Find a rough image of this object. Solution Object is placed between F and C, therefore, image is real, inverted magnified and beyond C. Further pq is towards F. Therefore, its image p d is towards infinity and it is more magnified. A rough image is as shown alongside. For Usi Sol Fo Us From the ray shown in figure, we can see that n' g will be a straight line. Exercise In the given problem, focal length of mirror is 30 cm and side of square is 10 cm with pP = 40 cm. Find perimeter of the image Ans (90 + 15/10) cm We Note h Type 7. Two mirror problems Type 8. How to Concept If an object is placed between two mirrors, then infinite reflections will take pla Therefore, infinite images are formed. But normally position of second image is asked, S we have to apply mirror formula two times. Image from first mirror acts as an object for t second mirror. Sign convention for second reflection will change but sign of focal lengthw not change. With abov O Example 8 Focal length of convex mirror M, is 20 cm and that of concave mirror M, is 30 cm. Find position of second image I,. Take first reflection rom M. M1 M2 20 ст 10 cm...(Ques near pink mark)

asked Mar 2, 2020

1 answer

(chatquestion)...57. Which of the following does not contain any co-ordinate bond? (a) H,0* (b) BF, (c) HF; (d) NH 58. Which of the following molecules does not have co-ordinate bonds? (a) PH (b) NO 2 (c) O3 (d) co3

asked Mar 2, 2020

0 answers

(chatquestion)...PDF Reader GOC Assign. (1).pdf X Enter Search Text takes piace througn out the entire system BOTA Physicsllalo "oto 11 (D) CH, / 115 182% (C) (A) (B) CH, 6. In which of the following molecules, all atoms are not coplanar ? (C) СОоCн, (A) (D) ! COOCH, (E) (C) (D) In which of the following molecules - NO, group is not coplanar with phenyl ring ? 4. Activate Windows (II) CH, = CH - OH CH, CH, 7. (1) CH, - CH = 0 activate Windows. 8:06 PM 3/2/2020...(6th question with reason)

asked Mar 2, 2020

0 answers

(chatquestion)...A conducting rod of length 2 m is placed on a horizontal table in north-south direction. It carries a current of 5 A from south to north. Find the direction and magnitude of the magnetic force acting on the rod. Given that the Earth's magnetic field at the place is 0-6 × 104T and angle of dip is (b) TC 6....(Somebody plz solve this)

asked Mar 2, 2020

1 answer

(chatquestion)...19. For the reaction, N2O5 2NO2 + 1/202, a[N,O,k[N,O,] dt d[NO, =k,[N,0] dt «[0,] k, [N,0.] dt The relation in between k,,k, & k, is (A) 2k, = k, = 4k, (B) k, = k, = k, (C) 2k, = 4k, = k, (D) None of these

asked Mar 2, 2020

0 answers

(chatquestion)...O) Both 6 as well as 8 (4) 3 (3 A certain sample of cuprous sulphide is found to have composition Cu, S, because of incorporation of Cu+ ions in the lattice. What is the mole % of Cu* in total copper content in this crystal ? (1) 99.8% (2) 11.11% (3) 88.88% (4) 50.50% 61 61. क्यू (1 (3 Totel velum of atoms present in face-centred 62

asked Mar 2, 2020

0 answers

(chatquestion)...Test-11 (Code A) An optical fibre consists of a transparent core fibre of refractiveindex n, surrounded by a transparent cladding of slightly lower index n,. If fibre is kept in medium of refractive index n, then maximum acceptance angle 0, on the axis of the core is given by no n, cladding n, core Y. axis n, cladding sinee (2) sin0e %3D no no (3) sine. + n (4) sin0, no no

asked Mar 2, 2020

0 answers

(chatquestion)...zW For an equilateral triangular prism, the angle of incidence and emergence are 45° and 55° respectively. The angle of deviation is (1) 35° 12) 40° (3) 45° (4) 42° 22. For two different positions of a thin convex lens between a reál thin, erect object and the screen, the Tength of images formed are 18 cm and 8 cm respectively. The length of the object is (sion A 10 cm (2) 12 cm (3) 13 cm (4) 14 cm Minimum magnifying power of a simple microscope is 6. The maximum magnifying power of the microscope will be sal

asked Mar 2, 2020

0 answers

(chatquestion)....2 (3) (3) sine. Su + Ju (4) sin0 %3D Ou Ou A prism of material refractive index u has refracting 7. angle A. For which of the following conditions there will be no emergent light whatever may be the angle of incidence? 1. 1. sin 2. (2) µ = sinA = 1 cosA (4) µ = secA %3D In standard notations, the condition for dispersion without deviation in thin prism combination is

asked Mar 2, 2020

0 answers

(chatquestion)...For two different positions of a thin convex lens between a real thin, erect object and the screen, the length of images formed are 18 cm and 8 cm respectively. The length of the object is 22. A 10 cm (2, 12 cm (3) 13 cm (4) 14 cm

asked Mar 2, 2020

1 answer

(chatquestion)...(1) Plane mirror (2) Convex mirror (3) Concave mirror a concave mirror of focal length F is D. The ratio of (Divisions 14) All of these 2. The distance of an object from the principal focus of Medic the size of the image to the size of the object is (1) (2) (3) F+ D An object is kept at 8 cm in front of a convex mirror of radius of curvature 24 cm. The magnification of

asked Mar 2, 2020

0 answers

(chatquestion)...S.C.O. 343-345, PHYSICS ASSIGNMENT Section-I A mass M is broken in two parts m and (M-m). What should be the ratio between m andM so that the force of gravitation between them is maximum? (1) 2:1 (3) 2:3 Two objectA and B are separated by a distance r. The magnitude of force of gravity on A due to B is FAR and that on B due to A is F 1. (2) 1:2 (4) 3:2 2. M. If the

asked Mar 2, 2020

0 answers

(chatquestion)...44 A focal radius is the line segment from a point on a hyperbola to one of the foci. The foci of a hyperbola are at (4, 0) and (-4, 0). The difference in the lengths of the focal radii from any point is always +6. Find the equation of the hyperbola. 45 A hyperbola has its foci at (c, 0) and (-c, 0). The point P(2, 4) is on the hyperbola and the focal radii (see Problem 44) from P are perpendicular. Find the equation of the hyperbola....(Anyone? This no. 44 and 45)

asked Mar 2, 2020

0 answers

(chatquestion)...46, A ball is thrown vertically upwards with a velocity of 10 ms. It returns to the ground with a velocity of 9 ms, If g = 9.8 ms, then the maximum height attained by the ball is nearly (assume air resistance to be uniform) -2 %3D (a) 5.1 m (b) 4.1 m (c) 4.61 m (d) 5 m

asked Mar 2, 2020

0 answers

(chatquestion)...100 genelfy than +3 Na", mg, u, s, or, RD Paga No.: +2 Dala Be, B order o radius

asked Mar 2, 2020

0 answers

(chatquestion)...b. 56. If t1, 12, 13 be the length of tangents from the centres of escribed circles i to the circumcircle, prove that 1 2s %3D 122 13? abc...(Q 56)

asked Mar 2, 2020

0 answers

(chatquestion)...(2) (4) A simple pendulum of length L and bob of mass m is released from a horizontal state. The speed of bob when its string makes an angle 60° with (3) 7 cm 10 cm 8 cm 39. 34. vertical is given by The dia seen fr off, th 60 to a poic VgL V39L (1) (2) 3gL gL (4) (3) 40. If a body looses half of its velocity on penetrating ill it

asked Mar 2, 2020

0 answers

(chatquestion)...15 In the given diagram, input voltage is V, and output across R, is Vo. Frequency of output voltage (V will be RL V, = 10 sin(100 Tt) %3D 2 (1) 50 Hz tance (2) 100 Hz ain (3) 150 Hz (4) 25 Hz www...(Help)

asked Mar 2, 2020

0 answers

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