Physics
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Jun 6, 2022
An Indian rubber cord L metre long and area of cross-section A metre 2  is suspended vertically. Density of rubber is...
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Jun 6, 2022
(a)Â Angle of contact is acute (b)Â Cohesion force is more (c)Â Â Adhesion force is more (d)Â Density of mercury...
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Jun 6, 2022
(a) 4o C (b)Â 25o C (c)Â Â 50o C (d)Â 75o C Ans. d
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Jun 6, 2022
(a)Â 2 : 3Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â (b)Â Â 3 : 4 (c)Â 3 : 2Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â (d)Â Â 6 : 1 Answer-b
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Jun 6, 2022
(a)Â Â 0.1 J Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â (b)Â Â 0.2 J (c)Â Â 10 JÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â (d)Â Â 20 Answer-a
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Jun 6, 2022
(a)Â Horizontal (b)Â Almost vertical (c)Â Â Â Concave (d)Â Â Â Convex Ans. d
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Jun 6, 2022
(a)  Energy density =(1/2)×strain×stress (b)  Energy density =(strain) 2 × volume (c)  Energy density = (strain)× volume (d)  Energy density =...
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Jun 6, 2022
The maximum force, in addition to the weight required to pull a wire of 5.0 cm long from the surface...
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Jun 6, 2022
(a)Â Â Increased kinetic energy (b)Â Â Increased potential energy (c)Â Â Decreased kinetic energy (d)Â Â Decreased potential energy Answer-b
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Jun 6, 2022
(a)  75 joule                                 (b)  60 joule (c)  50 joule                                 (d)  100 joule Answer-a
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Jun 6, 2022
25. The work per unit volume to stretch the length by 1% of a wire with cross sectional area of ...
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Jun 6, 2022
(a)Â Increase (b)Â Decrease (c)Â Â Remain unchanged (d)Â None of the above Ans. a
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Jun 6, 2022
24.A wire of length 50 cm and cross sectional area of 1 sq. mm is extended by 1 mm. The...
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Jun 6, 2022
(a)Â Attraction (b) Repulsion (c)Â Â Attraction or repulsion (d) None of the above Ans. a
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Jun 6, 2022
20.K is the force constant of a spring. The work done in increasing its extension from l1 to l2 will...
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Jun 6, 2022
(a)Â Cohesive force of oil>> adhesive force between oil and glass (b)Â Cohesive force of oil > cohesive force of...
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Jun 6, 2022
(a)Â Â 2 TL (b)Â 4 TL (c)Â Â 8 TL (d)Â 10 TL Ans. (c) Force on each side =2TL (due...
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Jun 6, 2022
19.When a force is applied on a wire of uniform cross-sectional area 3×10-6 m2 and length 4m, the increase in...
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Jun 6, 2022
(a) Increases with area (b)Â Decreases with area (c)Â Â Increase with temperature (d)Â Decrease with temperature Ans. d
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Jun 6, 2022
(a)Â Solids, liquids and gases (b)Â Liquids (c)Â Â Gases (d)Â Matter Ans. b
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Jun 6, 2022
(a)  30 dynes (b) 60 dynes (c)  750 dynes (d) 750 π dynes Ans. d
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Jun 6, 2022
(a)  Y×(Strain2/Volume) (b)  Stress × Strain × Volume (c) (Stress2×Volume) / (2Y) (d) (1/Y) × Stress × Strain × Volume Answer-c
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Jun 6, 2022
(a)Â Only on the cohesive force of liquid molecules (b)Â Only on the adhesive force between the molecules of glass...
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Jun 6, 2022
(a)Â Dancing of a camphor piece over the surface of water (b)Â Small mercury drop itself becomes spherical (c)Â Â A...
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Jun 6, 2022
(a) (YxA)/(2L)Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â ...
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Jun 6, 2022
(a)Â C.F. for water > A.F. for water and oil (b)Â C.F. for oil > A.F. for water and oil (c)Â Â C.F. for...
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Jun 6, 2022
21. When a 4 kg mass is hung vertically on a light spring that obeys Hooke’s law, the spring stretches...
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Jun 6, 2022
(a)Â Force of attraction between hair (b)Â Surface tension (c)Â Â Viscosity of water (d)Â Characteristic property of hairs Ans. b
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Jun 3, 2022
(a)Â water is absorbed by the coating (b)Â Cohesive force becomes greater (c)Â Â Water is not scattered away by the...
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Jun 3, 2022
(a)Â Surface tension (b)Â Less weight (c)Â Â Upthrust of liquid (d)Â None of the above Ans. a
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Jun 3, 2022
(a)Â Fl/2ALÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â ...
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Jun 3, 2022
(a)Â Force of surface tension is equal and opposite to the force of gravity (b)Â Force of surface tension predominates...
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Jun 3, 2022
(a)  T2/2x                  ...
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Jun 3, 2022
(a)  Elastic membrane is formed on water due to property of surface tension (b) Spiders and insects are lighter (c)  Spiders...
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Jun 3, 2022
(a)Â Increase in the saturated vapour pressure of water (b)Â Root mean square velocity of air molecules inside the bubble...
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Jun 3, 2022
(a) 0°C (b) 277 K (c)  370°C (d) Slightly less than 647 K Ans. c,d
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Jun 3, 2022
(a)Â It will remain on it as a sphere (b)Â It will spread as a thin layer (c)Â Â It will...
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Jun 3, 2022
(a)Â Increases (b)Â Decreases (c)Â Â Remains the same (d)Â Increases then decreases Ans. b
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Jun 3, 2022
(a)Â Chemicals of soap change (b)Â It increases the surface tension of the solution (c)Â Â It absorbs the dirt (d)Â ...
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Jun 3, 2022
(a)Â Frictional forces between molecules (b)Â Cohesive forces between molecules (c)Â Â Adhesive forces between molecules (d)Â Gravitational forces Ans. b