Physics
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Jun 7, 2022
V=(πQPr4) /ηl where η is coefficient of the viscosity and Q is (a) 8 (b) 1/8 (c) 16 (d) 1/16 Answer-b...
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Jun 7, 2022
(a) Glycerine (b) Water (c) Kerosene (d) All of them at the same time Answer-a (10)
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Jun 7, 2022
(a) High viscosity (b) Low viscosity (c) Moderate viscosity (d) High density Answer-a (9)
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Jun 7, 2022
(a) Zero (b) Maximum (c) Equal to critical velocity (d) May have any value Answer-d (3)
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Jun 7, 2022
(a) Hole number 4 (b) Hole number 3 (c) Hole number 2 (d) Hole number 1 Answer-b (9)
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Jun 7, 2022
(a) x=√D(H-D) (b) x=√[D(H-D)]/2 (c) x=2√D(H-D) (d) x=4√D(H-D) Answer-c (4)
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Jun 7, 2022
(a) The water in the tube rises to height v2 /2g (b) The water in the tube rises to height ...
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Jun 7, 2022
(a) Zero (b) 20.0 cm (c) 10.6 cm (d) 40.0 cm Answer-b (10)
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Jun 7, 2022
660 kgm–3. The velocity with which gasoline begins to shoot out of the hole is (a) 27.8 m/s ...
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Jun 7, 2022
A1 and A2 , are v1 and v2 The difference in the levels of the liquid in the two vertical...
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Jun 7, 2022
(a) 282.8 cm/sec (b) 432.6 cm/sec (c) 632.6 cm/sec (d) 832.6 cm/sec Answer-a (11)
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Jun 7, 2022
(a) Upthrust of the air which will be equal to the weight of the air having the same volume as...
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Jun 7, 2022
[P/(ρg)]+ h + (1/2)(v2/g) The terms A, B and C are generally called respectively: (a) Gravitational head, pressure head and...
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Jun 7, 2022
(a) Move up (b) Move down (c) Move erratically (d) Remain at the same level Answer-b (38)
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Jun 7, 2022
(a) Bernoulli’s theorem (b) Boyle’s law (c) Archimedes principle (d) Newton’s law of motion Answer-a (15)
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Jun 7, 2022
(a) Dynamic lift of an aeroplane (b) Viscosity meter (c) Capillary rise (d) Hydraulic press Answer-a (11)
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Jun 7, 2022
(a) The speed of a particle always remains same (b) The velocity of a particle always remains same (c) The...
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Jun 7, 2022
A1 and A2 are the cross-sections of the portions of the tube as shown. Then the ratio of speeds v1 /...
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Jun 7, 2022
(a) Maximum speed and least pressure (b) Maximum pressure and least speed (c) Both pressure and speed maximum (d) Both...
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Jun 7, 2022
(a) 4 : 9 (b) 9 : 4 (c) 8 : 27 (d) 1 : 1 Answer-a (13)
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Jun 7, 2022
(a) Gravity to viscous force (b) Gravity force to pressure force (c) Inertia forces to viscous force (d) Viscous forces...
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Jun 7, 2022
(a) Zero (b) Maximum (c) In between zero and maximum (d) Equal to critical velocity Answer-a (6)
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Jun 7, 2022
T1 and T2. Their lengths are l1 and l2 and radii of cross-section are r1 and r2 The rate of...
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Jun 7, 2022
radius is (Surface tension of the soap solution is (3/100) N/m) (a) 75.36 x 10-4 joule (b) 37.68 x 10-4...
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Jun 7, 2022
size 10 cm x 10 cm is (Surface tension T= 3 x 10-2 Nm (a)6 x 10-4 j (b)...
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Jun 7, 2022
106 small drops. The energy used will be (surface tension of mercury is 35 x10-3N/cm (a) 4.4 x 10-3 j...
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Jun 7, 2022
(a) 100 : 1 (b) 1000 : 1 (c) 10 : 1 (d) 1 : 100 Ans. d (6)
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Jun 7, 2022
The surface tension of liquid is 0.5 N/m. If a film is held on a ring of area 0.02 m2,...
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Jun 7, 2022
(a) Becomes zero (b) Becomes infinite (c) is equal to the value at room temperature (d) is half to the...
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Jun 7, 2022
(a) 1000 : 1 (b) 1 : 1000 (c) 10 : 1 (d) 1 : 10 Ans. d (5)
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Jun 7, 2022
(a) 10 cm per sec (b) 2.5 cm per sec (c) 5×4¹/3 per sec ...
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Jun 7, 2022
is 2 x 10-2 N/m. To blow a bubble of radius 1 cm, the work done is (a) 4 π...
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Jun 7, 2022
(a) R/2 (b) R/5 (c) R/6 (d) R/10 Ans. d (11)
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Jun 7, 2022
(a) Rn(2/3) σ (b) (n(2/3) – 1) Rσ (c) (n(1/3) – 1) Rσ (d) 4πR2(n(1/3) – 1)σ (e) [1/( n(1/3)...
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Jun 7, 2022
(a) π D2 σ (b) 2 π D2 σ (c) 3 π D2 σ (d) 4 π D2 σ Ans....
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Jun 7, 2022
is 1.9 x 10-2N/m . Work done in blowing a bubble of 2.0 cm diameter will be (a) 7.6 x...
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Jun 7, 2022
(a) V/16 (b) ...