(a) 100 dyne/cm (b) 68.66 dyne/cm (c) 137 dyne/cm (d) 150 dyne/cm Ans. b (37)
(a) d (b) 2d (c) 3d (d) 5d Answer-b (2)
(a) Less than 40 N/m2 (b) Greater than 40 N/m2 (c) Less than 20 N/m2 (d) Greater than 20 N/m2 Ans. b (3)
(a) 2T/r (b) 4T/r (c) T/2r (d) T/r Ans. b (4)
A, B and C prepared by blowing the capillary tube fitted with stop cocks, S1, S2 and S3. With stop cock S closed and stop cocks S1, S2 and S3 opened (a) B will start collapsing with volumes of A …
are r1 and r2. In isothermal conditions, two meet together in vaccum. Then the radius of the resultant bubble is given by (a) R= (r1+r2)/2 (b) R= r1 (r1 r2+r2) (c) R2 = r21+r22 (d) R= r1+r2 Ans. c (9)
(a)(S/r) cos θ (b) (2S/r) cos θ (c) S/r cos θ (d) 2S/r cos θ Ans. b (7)
(a) 102 : 101 (b) (102)3 : (101)3 (c) 8 : 1 (d) 2 : 1 Ans. c (26)
(a) 1 : 64 (b) 1 : 4 (c) 64 : 1 (d) 1 : 2 Ans. a (8)
(a) 2.3 cm (b) 4.5 cm (c) 5 cm (d) 7 cm Ans. c (35)
(a) The pressure on the bottom of tank (a) is greater than at the bottom of (b). (b) The pressure on the bottom of the tank (a) is smaller than at the bottom of (b) (c) The pressure depend on …
(a) Increase on sides (b) Increase downwards (c) Increase in all directions (d) Never increases Answer-c (2)
water is 70 x 10-3 N/m difference of pressures between inside and out side of the spherical drop is (a) 35 N/m2 (b) 70 N/m2 (c) 140 N/m2 (d) Zero Ans. c (21)
(a) Metal is 3 (b) Metal is 7 (c) Liquid is 3 (d) Liquid is 1/3 Answer-b,c (6)
(a) 6 × 5 × 5 × 5 gf (b) 4 × 4 × 4 × 7 gf (c) 5 × 5 × 5 × 7 gf …
(a) It will slowly come back to its earlier position (b) It will remain submerged, where it is left (c) It will sink (d) It will come out violently Answer-b (5)
(a) Acute (b) Obtuse (c) Zero (d) 900 Ans. b (8)
(a) 0° (b) 30o (c) 90o (d) 135o Ans. d (6)
(a) Increases (b) Decreases (c) Remains the same (d) First increases and then decreases Ans. b (7)
(a) Convex (b) Concave (c) Plane (d) Uncertain Ans. a (4)
(a) Zero (b) Obtuse (More than 90°) (c) Acute (Less than 90°) (d) 90° Ans. b (8)
(a) 1 : 3 (b) 1 : 9 (c) 27 : 1 (d) 1 : 27 Ans. d (4)
(a) The internal pressure of the bubble is always greater than external pressure (b) The internal pressure of the bubble is always equal to external pressure (c) The internal pressure of the bubble is always less than external pressure (d) …
η ( > 1) times lighter than water is suspended in a water tank by a string tied to its base as shown in fig. If the mass of the sphere is m then the tension in the string is given …
(a) 3.9 N/m (b) 3.9 ×10–2 N/m (c) 3.9 ×10–3 N/m (d) 3.9 dyne/m Ans. b (4)
(a) Internal pressure of the smaller bubble is higher than the internal pressure of the larger bubble (b) Pressure of the larger bubble is higher than the smaller bubble (c) Both bubbles have the same internal pressure (d) None of …
(a) The size of A will increase (b) The size of B will increase (c) The size of B will increase until the pressure equals (d) None of these Ans. a (10)
r1 and r2 equal to 4 cm and 5 cm are touching each other over a common surface s1s2 (shown in figure). Its radius will be (a) 4 cm (b) 20 cm (c) 5 cm (d) 4.5 cm Ans. b …
(a) Increases (b) Decreases (c) Remains unchanged (d) None of these Answer-b (29)
radius 0.1 mm situated just below the surface of water will be equal to [Take surface tension of water 70 x 10-3 N/m-1 and atmospheric pressure = 1.013 x 105 N/m-2 ] (a) 2.054 x 103 pa (b) 1.027 x …
(a) Bernoulli (b) Archimedes (c) Boyle (d) Pascal Answer-d (3)
v0 and density d0 above the surface of a liquid of density d will be (a) d0 /d (b) (d …
(a) 4 : 3 (b) 2 : 3 (c) 3 : 4 (d) 1 : 3 Answer-c (4)
(a) Equal to atmospheric (b) Equal to upper side pressure (c) More than upper side pressure (d) Lesser than upper side pressure Ans. d (6)
(a) Acceleration due to gravity (b) Height of the liquid column (c) Area of the bottom surface (d) Nature of the liquid Ans.c (7)
5 gm cm–3 and having dimensions 5 cm × 5 cm × 5 cm is weighed in water. Its apparent weight will be (a) 5 × 5 × 5 × 5 gf (b) 4 × 4 × 4 × 4 …