In a constant level tube, size of the bubble remains constant because upper wall is (A) Of relatively larger radius (B) Of relatively smaller radius (C) Flat (D) Convex downwards

In a constant level tube, size of the bubble remains constant because upper wall is
(A) Of relatively larger radius
(B) Of relatively smaller radius
(C) Flat
(D) Convex downwards
by

1 Answer

Answer :

(A) Of relatively larger radius
by

Related questions

A boy is standing in front of and close to a special mirror. He finds the image of his head bigger than normal, the middle part of his body of the same size, and his legs smaller than normal. The special mirror is made up of three types of mirrors in the following order from top downwards: (a) Convex, Plane, Concave (b) Plane, Convex, Concave (c) Concave, Plane, Convex (d) Convex, Concave, Plan

Description : A boy is standing in front of and close to a special mirror. He finds the image of his head bigger than normal, the middle part of his body of the same size, and his legs smaller than normal. The ... , Plane, Concave (b) Plane, Convex, Concave (c) Concave, Plane, Convex (d) Convex, Concave, Plan

Last Answer : (c) Concave, Plane, Convex

On the ladder resting on the ground and leaning against a smooth vertical wall, the force of friction will be (A) Downwards at its upper end (B) Upwards at its upper end (C) Perpendicular to the wall at its upper end (D) Zero at its upper end

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Last Answer : (D) Zero at its upper end 

On a ladder resting on smooth ground and leaning against vertical wall, the force of friction will be (A) Towards the wall at its upper end (B) Away from the wall at its upper end (C) Upwards at its upper end (D) Downwards at its upper end

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When the bubble of the level tube of a level, remains central (A) Line of sight is horizontal (B) Axis of the telescope is horizontal (C) Line of collimation is horizontal (D) Geometrical axis of the telescope is horizontal

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The sensitiveness of a level tube decreases if (A) Radius of curvature of its inner surface is increased (B) Diameter of the tube is increased (C) Length of the vapour bubble is increased (D) Both viscosity and surface tension are increased

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Last Answer : (D) Both viscosity and surface tension are increased

Sensitiveness of a level tube is designated by (A) Radius of level tube (B) Length of level tube (C) Length of bubble of level tube (D) None of the above

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With the rise of temperature, the sensitivity of a bubble tube (A) Decreases(B) Increases (C) Remains unaffected (D) None of the above

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Finned tube heat exchangers (A) Give larger area per tube (B) Use metal fins of low thermal conductivity (C) Facilitate very large temperature drop through tube wall (D) Are used for smaller heat load

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When a tube of smaller diameter is dipped in water, the water rises in the tube with an upward __________ surface. (A) Concave(B) Convex (C) Plane (D) None of these

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The radius of curvature of the arc of the bubble tube is generally kept (A) 10 m (B) 25 m (C) 50 m (D) 100 m

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The sensitivity of a bubble tube can be increased by (A) Increasing the diameter of the tube (B) Decreasing the length of bubble (C) Increasing the viscosity of liquid (D) Decreasing the radius of curvature of tube

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Last Answer : (A) Increasing the diameter of the tube

The desired sensitivity of a bubble tube with 2 mm divisions is 30". The radius of the bubble tube should be (A) 13.75 m (B) 3.44 m (C) 1375 m (D) None of these

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At smaller disc angles , the draft tends to increase in disc plough because of a) Greater contact area between furrow wall and the convex side of the disc b) Increase in the side draft c) Greater throw of the soil d) All of the above

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The tension in the wire rope supporting a lift moving with a uniform velocity a.Is more when the lift is moving upwards b.Is more when the lift is moving downwards c.Is less when the lift is moving down-wards d.Is less when the lift is moving upwards e.Remains constant irrespective of the lift movement

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The surface of water in a pond remains cool even on a hot day because 1. water evaporates at the surface and evaporation causes cooling 2. the heat absorbed at the surface is transmitted downwards 3. Water in contact with the bottom of the pond becomes cool and rises to the surface due to convection Which of the above statements is/are correct? (a) 1 only (b) 3 only (c) 1 and 3 (d) 1, 2 and 3

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The amount of oxygen in the atmosphere remains relatively constant because it is given off by - (1) Oceans (2) Animals (3) Rocks (4) Plants

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The tangent to the liquid surface in a level tube, is parallel to the axis of the level tube at (A) Every point of the bubble (B) Either end of the bubble (C) The mid-point of the bubble (D) No where

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In an adjusted level, when the bubble is central, the axis of the bubble tube becomes parallel to (A) Line of sight (B) Line of collimation (C) Axis of the telescope (D) None of these

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With regard to the lacrimal drainage system: a. the upper lacrimal punctum is lateral to the lower punctum b. the lacrimal canaliculi are lined by stratified squamous epithelium c. nasolacrimal duct is narrowest at the lowest end d. nasolacrimal duct runs downwards, lateral and forwards to the anterior part of inferior meatus e. congenital blockage is due mainly to delay development of common canaliculus

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Newton’s rings experiment is performed and radius (or diameter) is calculated. Now Plano-convex lens is replaced with another Plano-convex lens of greater Radius of curvature. What will be effect on radius (or diameter)? (a) Radius (or diameter) will remain constant but there will be more brightness (b) Radius (or diameter) will increase (c) Radius (or diameter) will decrease (d) There will be no effect

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For high sensivity of the bubble tube (A) A liquid of low viscosity is used (B) A liquid of low surface tension is used (C) The bubble space should be long (D) All the above

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