Recent questions tagged other

(chatquestion)...43. On catalytic reduction (H2/Pt) how many alkenes will give n-butane ? (a) 1 (c) 3 (b) 2 (d) 4...(Plz give working , correct answer is c)

asked Apr 11, 2020 by balaji.thirumalai

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(chatquestion)...in of another plant in the (d) Fertilisation of a flower of another plant belong (c) 1 2 (d) 4 4. 3 18. Dr. F Went noted that if coleoptile tips were 25. Male gametophyte wit 2 present in (a) Pteris (b) Funaria removed and placed on agar for one hour, the 20. An aggregate fruit is- agar would produce a bending when placed on one side of freshly cut coleoptile stumps. Of what significance is this experiment? (a) It made possible the isolation and exact identification of auxin (a) multicarpellary sync- multicarpellary apor (c) complete infloresce (d) multicarpellary sup in 27. Pollen tablets are a (c) It supports the hypothesis that IAA is auxin Jd) It demonstrated polar movement of auxins (b) It is the basis for quantitative determination of small amounts of growth-promoting substances (a) In vitro fertilisation (b) breeding prograr supplementing fo (d) Ex situ conserva 19. Deficiency symptoms of nitrogen,and 28. Function of filifor (b) stimulate divisic uce necta ssium are visible first in eloesis young leaves (a) recognise the s....(Is question Ka answer b hoga ya d hoga)

asked Apr 11, 2020 by balaji.thirumalai

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(chatquestion)...cases. In the arrangement shown in Fig. 1.17. the mass of the rod Mexceeds the mass m of the ball. The ball has an opening permitting it to slide along the thread with some friction. The mass of the pulley and the friction in its axle are negligible. At the initial moment the ball was located opposite the lower end of the rod. When set free, both bodies began moving with constant accelerations. Find the friction force between the ball and the thread it t seconds after the beginning of motion the ball got opposite the upper end of the rod. The rod length equals l. Fig. 1.17 40 the mnss of ball

asked Apr 11, 2020 by balaji.thirumalai

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(chatquestion)...Show that the relation R on N ×N, defined by (a, b) R (c, d) a + d = b+ c is an equivalent relation. 7. Let S be the set of all real numbers and let R = ((a, b) : a, beS and a = ± b}. Show that R is an equivalence relation ons...(Q 6)

asked Apr 11, 2020 by balaji.thirumalai

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(chatquestion)...(c) 1.0 10 (d) 1.0 10* -01 01 (q) 68, Formation of a solution from two components can be considered as ) Pure solvent→separated solvent molecules, AH, (ii) Pure solute (m) Separated solvent and solute molecules solut separated solute molecules, AH, Solution so formed will be ideal if (a) AH AH, +AH,+ AH, (b) AH AH, All,-AH, AH,-AH,-AH, AH-AH,- AH, (c) AH-...(Plz explain)

asked Apr 11, 2020 by balaji.thirumalai

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(chatquestion)...Find the magnitude of total positive charge and total negative charge on a hollow sphere, surface-charge-density of whose surface is given by o = 00 cos e, where oo is a constant and e is the angle made by radius vector with an axis of the Sphere.

asked Apr 10, 2020 by balaji.thirumalai

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(chatquestion)...88% I 8:11 pm + = Solution DPP-18 Q. No.: 28 InCorrect +ve 4, -ve 1 Qs. A particle of mass m is released from rest and follows a parabolic path as shown. Assuming that the displacement of the mass from the origin 3 is small which graph correctly depicts the position of the particles as a function of time ? 4 (y), 6. →(x) 8 Options 9. for x(t) 10 11 12 13 x(t) 14 15 16 17

asked Apr 10, 2020 by balaji.thirumalai

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(chatquestion)...%3D Consider the graph of quadratic trinomial y = ax2 + bx + c as shown below where x, and x, are roots of the equation ax2 + bx + c = 0. Which of the following is/are correct ? y X-X2 (1) a-b-c<0 2) bc <0 3) b>0 4) b and c have the same sign different from a.

asked Apr 10, 2020 by balaji.thirumalai

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(chatquestion)...RUšl 393 B/s 8:29 pm © 22% 4 Test Summary Solutions View in : English Question Figure shows a flywheel of radius 10 cm. Its moment of inertia about the axis of rotation is 0.4 kg m2. A massless string passes over the flywheel and a mass of 2 kg attached at its lower end. Angular acceleration of flywheel in (rad/s²) is nearly (g = 10 m/s?) шттт 2 kg 4.8 6.2 3.2 9.6

asked Apr 10, 2020 by balaji.thirumalai

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(chatquestion)...x²(6x6 + 5x +3) Vx* +x6 +1 (Where 'c' is constant of integration) dx is: 1 x³ +x2 +1+c 2 x3 x6 + x* + 1 +c 3 2x?/x6 + x* + 1 +c 4 /x6 +x+ +1+c

asked Apr 10, 2020 by balaji.thirumalai

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(chatquestion)...+ Br2 hv → mixture of product. 21. Among the following which product will formed minimum amount. (A) Br (B) Br Br Br (C) (D)...(

asked Apr 10, 2020 by balaji.thirumalai

1 answer

(chatquestion)...7Apommong norIZOAI Uwerer c) Top of the circle d) Any point on the circle 23) A particle is describing a circular motion in a vertical plane, It has a velocity of 10m/s in the lowest position. The maximum radius of the circle is .. (g= 10 m/s') a) 0.1 m d) 2.5 m A particle is in UCM. It has a momentum of magnitude P at a point. When its angular displacement is 120 c) 1.5 m b) 2.0 m from the point, the magnitude of change of momentum is b) PE c) 3P a) Zero d) PNE 25) A conical pendulum has a string of length 1.0 m and rotates with the string inclined at an angle 0 with the

asked Apr 10, 2020 by balaji.thirumalai

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(chatquestion)...9) Maximum safety speed for a vehicle is 72 km/hr to negotiate a plane curved road safely. Radius of curvature of the curve is 100 m. The coefficient of friction between the road and tyres is a) 0.2 b) 0.3 c) 0.4 d) 0.5 A cylindrical drum of radius 1.0 m is rotating around a vertical axis with a speed of 60 rpm. A small body placed at a point on the inner wall remains stationary. If g= 10 m/s', the coefficient of friction between the body and the wall of the eyclinder is .. a) 0.10 b) 0.15 d) 0.25 c) 0.20 1) The equation between angular displacement 0 and time t 0 = Ar + B where A and B are constants. The

asked Apr 10, 2020 by balaji.thirumalai

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(chatquestion)...A cylindrical drum of radius 1.0 m is rotating around a vertical axis with a speed of 60 rpm. A small body 2 placed at a point on the inner wall remains stationary. If g = 10 m/s , the coefficient of friction between the body and the wall of the cyclinder is .... a) 0.10 b) 0.15 c) 0.20 d) 0.25

asked Apr 10, 2020 by balaji.thirumalai

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(chatquestion)...An incident beam of light of intensity Io is made to fall on a polaroid A. Another polaroid B is oriented with respect to A, there is no light emerging out of B. A third polaroid C is now midway between A andB and is so oriented that its axis bisects the angle between A & B. What is the intensity of light now between (i) A and C (ii) C and B ? (C.B.S.E. Sample) [Ans. 01 4.

asked Apr 9, 2020 by balaji.thirumalai

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(chatquestion)...Light of wave length 6000 Á is incident normally on a slit. The first minima of the diffraction pattern is observed to lie at a distance of 5 mm from the central maxima on a screen placed at a distance of 2 m from the slit. Calculate [Ans. 2-4 x 10-2 cm] the width of slit.

asked Apr 9, 2020 by balaji.thirumalai

0 answers

(chatquestion)...Find the ratio of intensities of two points on a screen in Young's Double slit experiment, when waves from the two slits have path difference of (i) 0 and (ii) 2/4. (C.B.S.E. 2003) [Ans. 2 : 1]

asked Apr 9, 2020 by balaji.thirumalai

0 answers

(chatquestion)...In Young's experiment, two coherent sources are placed 0.90 mm apart and the fringes are observed one metre away. If it produces the second dark fringe at a distance of Imm from the central fringe, what will be the wavelength of monochromatic light used ? (C.B.S.E.) [Ans. 6000 AJ

asked Apr 9, 2020 by balaji.thirumalai

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(chatquestion)...TAIS, 1J Two coherent sources of light emit waves of amplitudes a and 2a. They meet at the point P equidistant from the two sources. If the intensity of the first wave is 1, what will be the resultant intensity at a point P ? (C.B.S.E.) [Ans. 9| 8. In Young's experiment 0.00

asked Apr 9, 2020 by balaji.thirumalai

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(chatquestion)...The path difference between two interfering waves at a point on the screen is 171-5 times the wavelength. Is the point bright or dark ? If the path difference is 0-01029 cm, find the wavelength. [Ans. Dark, 6000 Ả] In an interference

asked Apr 9, 2020 by balaji.thirumalai

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(chatquestion)...In Young's double slit experiment, the two slits are 1 mm apart and the fringes are observed at 1 metre from the plane of the slits. The distance between the 11th and Ist bright fringes is 9-8 mm. Calculate the wave length of the light used. [Ans. 9800 Å] In a Young's double slit

asked Apr 9, 2020 by balaji.thirumalai

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(chatquestion)...In Young's double slit experiment, light of wavelength 6000 Å is used to get an interference pattern on a screen. When the screen is brought towards the double slit by 50 cm, the fringe width changes by 1:5 mm. Find the distance between two slits. (H.S.E.B. 2002) [Ans. 0-002 mm]

asked Apr 9, 2020 by balaji.thirumalai

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(chatquestion)...1. Prove n = sin A + 8 where n is the refractive index of %3D sin A the material of a prism, A is angle of prism and 8 is the deviation for a ray falling perpendicularly on a refracting surface.

asked Apr 9, 2020 by balaji.thirumalai

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(chatquestion)...An equiconvex lens with radii of curvature of magnitude r each is put over a liquid layer poured on top of a plane mirror. A small needle with its tip on the principal axis of the lens is moved along the axis until its inverted real image coincides with the needle itself. The distance of needle from lens is measured to be 'a'. On removing the liquid layer and repeating the experiment the distance is found to be 'b'. glass Liquid Given that two values of distances measured represent the real length values in the two cases, obtain a formula for refractive index of the liquid. (C.B.S.E. Sample 2010)

asked Apr 9, 2020 by balaji.thirumalai

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(chatquestion)...Let a and B be the roots of the equation ax? + 2bx + c 0 and a + y and B+ y be the roots of Ax² + 2Bx + C = 0. Then prove that A?(b2- 4ac) = a?(B2- 4AC).

asked Apr 9, 2020 by balaji.thirumalai

0 answers