Description : For a person having hypermetropia, the near point is – (1) greater than 25 cm (2) greater than 50 cm (3) less than 25 cm (4) infinity
Last Answer : (1) greater than 25 cm Explanation: For a hyper-metropic eye ,the near points shift away from the eye Le. farther away from the normal near point (25cm). In a hypermetropic eye, the light ... behind the retina. Here a person sees well for distance but near vision is difficult and causes strain.
Description : For a person having hypermetropia, the near point is ______. (1) Greater than 20cm (2) Lesser than 25cm (3) Greater than 25cm (4) Lesser than 30cm
Last Answer : (3) Greater than 25cm Explanation: The near point of a person suffering from hypermetropia is 75 cm. calculate. The near point of a person suffering from hypermetropia is 75 cm. Calculate the focal length ... lens required to enable him to read the newspaper which is kept at 25 cm from the eye.
Description : Cylindrical lens is used by a person suffering from - (1) astigmatism (2) myopia (3) hypermetropia (4) None of these
Last Answer : (1) astigmatism Explanation: A cylindrical lens is typically used to focus, condense or expand incoming light. A cylindrical lens has one cylindrical surface, causing light to be focused in a single dimension or axis.
Description : Distant objects are visible as a little out of focus in this condition – (1) presbiopia (2) hypermetropia (3) astigmatism (4) myopia
Last Answer : (4) myopia Explanation: Myopia, also known as nearsightedness and short-sightedness, is a condition of the eye where the light that comes in does not directly focus on the retina but in front of it, causing ... at a distant object to be out of focus, but in focus when looking at a close object.
Description : A man cannot see clearly beyond 10 meters. The disease he suffers from : (1) Far sight (2) Myopia (3) Cataract (4) Hypermetropia
Last Answer : (2) Myopia Explanation: The man suffers from myopia, a vision condition in which close objects are seen clearly, but objects farther away appear blurred. Nearsightedness occurs if the eyeball is too ... a result, the light entering the eye isn't focused correctly and distant objects look blurred.
Description : Distant objects are visible as a little out of focus in this condition : (1) presbiopia (2) hypermetropia (3) astigmatism (4) myopia
Last Answer : myopia
Last Answer : Myopia
Description : Hypermetropia or longsight can be corrected by using : (1) Bifocal lenses (2) Cylindrical lenses (3) Concave lenses (4) Convex lenses
Last Answer : Convex lenses
Description : The speed of light in air is – (1) 3 x 10⁸ m/s (2) 3 x 10⁻⁸ cm/s (3) 8 x 10³ m/s (4) Infinity
Last Answer : (1) 3 x 10⁸ m/s Explanation: Speed of light (in Media) = Speed of Light (in Vacuum) / Refreactive Index of Material. Speed of light in air as taken generally is 3 X 10 power 8 meter per second.
Description : When cost of production is zero, monopoly equilibrium will be established at a level where elasticity of demand curve is : (a) Greater than one (b) Equal to one (c) Less than one (d) Infinity
Last Answer : Equal to one
Description : During the adiabatic process, which of the following is the change in entropy? a. zero b. greater than zero c. less than zero d. infinity
Last Answer : zero
Description : ______ is the defect which occurs in eye due to excessive curvature of cornea and person is not able to see distant objects clearly . a)myopia b)hypermetropia c)squint d)cataract
Last Answer : a)myopia
Description : The density of lead is 12 grams per cm3. A lead brick has a mass of 1.5 kilograms. Its dimensions are 10 cm by 5 cm by 4 cm. Is it: w) More than 75% hollow x) Between 50 and 75% hollow y) Between 25 and 50% hollow z) Between 0 and 25% hollow
Last Answer : ANSWER: Y -- BETWEEN 25 AND 50% HOLLOW
Description : What reflecting surface forms a geometrically perfect image of a point source located at infinity (such as that approximated by a star)? w) Paraboloid x) Ellipsoid y) spherical z) Hyperboloid
Last Answer : ANSWER: W -- PARABOLOID
Description : For a negative point charge, the electric field vectors: w) circle the charge x) point radially in toward the charge y) point radially away from the charge z) cross at infinity
Last Answer : ANSWER: X -- POINT RADIALLY IN TOWARD THE CHARGE
Description : Diopter is the power of a lens having a focal length of (A) 25 cm (B) 50 cm (C) 75 cm (D) 100 cm
Last Answer : (D) 100 cm
Description : A far-sighted person has a near point at 100 cm -General Knowledge
Last Answer : a -0.8 D b -3.0 D c +0.8 D d +3.0 D Answer : D Solution : Given near point = 100 cm. ∴v=−100cmandu=−25cm∴v=-100cmandu=-25cm 1f=1v−1u=1−100−1&minus ... =1−100+125=−1+4100=3100cm.1f=1-100+125=-1+4100=3100cm. Power, P=1for,100fD=100×3100D=3D
Description : A far-sighted person has a near point at 100 cm. What must be the power of the correcting lens? -General Knowledge
Last Answer : Power of the lens = To calculate focal length using the near point=100cm f= Where, u= object size v= image size ∵ image is virtual, it is with a - sign. The near point of a normal eye=u=25 cm Using this, f= = +33.3 cm=+ Also, Power=P= where f is in meters ⇒P=+ = + 3 D
Description : A far-sighted person has a near point at 100 cm. What must be the power of the correcting lens?
Last Answer : +3.0 D
Description : The hydrodynamic and thermal boundary layers will merge, when (A) Prandtl number is one (B) Schmidt number tends to infinity (C) Nusselt number tends to infinity (D) Archimedes number is greater than 10000
Last Answer : (A) Prandtl number is one
Description : Ability of the eye to see objects at all distances is called (a) Binocular vision (b) Myopia (c) Hypermetropia (d) Accommodation
Last Answer : Ans:(d)
Description : Among the defects of eye, the shortsightedness is called - (1) coma (2) hypermetropia (3) myopia (4) astigmatism
Last Answer : (3) myopia Explanation: Myopia, commonly known as being nearsighted and shortsighted. It is a condition of the eye where the light that comes in does not directly focus on the retina but in ... . It may also be corrected by refractive surgery, though there are cases of associated side effects.
Description : Give reason: A convex lens is used to correct hypermetropia.
Last Answer : In a hypermetropic eye, light is focused behind the retina. A convex lens will force it to form on the retina. Hence a convex lens is used to correct hypermetropia.
Description : Rajat has hypermetropia. What type of lens will be the ophthalmologist recommend to correct his vision?
Last Answer : Convex
Description : Among the defects of eye, the shortsightedness is called (1) coma (2) hypermetropia (3) myopia (4) astigmatism
Description : If 50 m point of a 100 m tape is 50 cm off line, and 50 m sections are straight, an error is generated equal to (A) 1/10,000 (B) 1/15,000 (C) 1/20,000 (D) 1/25,000
Last Answer : (C) 1/20,000
Description : Ray coming from an object situated at infinity, fall on a convex lens and an image is formed at a distance of 16 cm from the lens. When a concave lens
Last Answer : Ray coming from an object situated at infinity, fall on a convex lens and an image is formed ... . Calculate the focal length of the concave lens.
Description : In the diagram shows below rays are coming from infinity and after passing through both the lenses meet on a screen placed at a distance of 30 cm from
Last Answer : In the diagram shows below rays are coming from infinity and after passing through both the lenses ... Calculate the focal length of the concave lens.
Description : The radius of curvature of a converging mirror is 30 cm. At what distance from the mirror should an object be placed so as to obtain a virtual image? (a) infinity (b) 30 cm (c) Between 16 cm and 30 cm (d) Between 0 cm and 15 cm
Last Answer : (d) Between 0 cm and 15 cm
Description : Where will the image be formed if he shifts the candle towards the lens at a position of 35 cm? (a) At focus (b) Between focus and pole (c) At infinity (d) Between f 2 and f 1
Last Answer : (c) At infinity
Description : Which of the following correspond to the recommendations of IRC for pavement thickness determination by CBR Method ? 1. CBR tests are to be conducted in-situ 2. Static compression is best adopted 3. The top 50 cm of sub grade ... 1, 2 and 3 (b) 1 and 2 only (c) 2 and 3 only (d) 1 and 3 only
Last Answer : (c) 2 and 3 only
Description : Double my number, I'm less than a score, half of my number is less than four. Add one to my double when bakers are near, days of the week are still greater, I fear.What am I? -Riddles
Last Answer : The number six.
Description : The total discharge from two wells situated near to each other is (A) Sum of the discharges from individual wells (B) Less than the sum of the discharges from individual wells (C) Greater ... of the discharges from individual wells (D) Equal to larger of the two discharges from individual wells
Last Answer : (B) Less than the sum of the discharges from individual wells
Description : The apparent weight of a person in a lift which is moving down with uniform acceleration is _______. (1) greater than the weight when the person is stationary (2) twice the weight when the person ... than the weight when the person is stationary (4) same as the weight when the person is stationary
Last Answer : (3) less than the weight when the person is stationary
Description : An object is placed at a distance equal to the focal length of convex mirror. If the focal length of the mirror be f, then the distance of the image from the pole of the mirror is (a) Less than f (b) Equal of f (c) More than f (d) Infinity
Last Answer : Ans:(a)
Description : A demand curve, which is parallel to the horizontal axis, showing quantity, has the price elasticity equal to - (1) Zero (2) One (3) Less than one (4) Infinity
Last Answer : (4) Infinity Explanation: Price elasticity of demand measures consumer response to price changes. If consumers are relatively sensitive to price changes, demand is elastic: if they are relatively ... keeps changing with the price. So the coefficient of price elasticity of demand is infinity.
Description : Which of the following conditions indicates a short circuited capacitor when checking its condition with an ohmmeter? A. The capacitor shows charging, but the final resistance reading is appreciably less ... moves quickly to the low resistance side of the scale, then slowly recedes toward infinity.
Last Answer : Answer: B
Description : A demand curve, which is parallel to the horizontal axis, showing quantity, has the price elasticity equal to (1) Zero (2) One (3) Less than one (4) Infinity
Last Answer : Infinity
Description : The focal length of a plane mirror is (1) Positive (2) Negative (3) Zero (4) Infinity
Last Answer : (4) Infinity Explanation: A plane mirror is a mirror with a flat reflective surface. The focal length of a plane mirror is infinity. Its optical power is zero.
Description : A bomb at rest explodes into a large number of tiny fragments. The total momentum of all the fragments – (1) is zero (2) depends on the total mass of all the fragments (3) depends on the speeds of various fragments (4) is infinity
Last Answer : (1) is zero Explanation: In an explosion, an internal impulse acts in order to propel the parts of a system (often a single object) into a variety of directions. After the explosion, the individual parts of the system (that is often a collection of fragments from the original object) have momentum.
Description : When temperature rises, resistance of negative temperature coefficient thermistor A. increases B. decreases C. zero D. infinity
Last Answer : decreases
Description : If charge is placed at infinity, it's potential is A. zero B. infinite C. 1 D. -1
Description : Gravitational potential is always A. positive B. negative C. zero D. infinity
Last Answer : negative
Description : A bomb at rest explodes into a large number of tiny fragments. The total momentum of all the fragments (1) is zero (2) depends on the total mass of all the fragments (3) depends on the speeds of various fragments (4) is infinity
Last Answer : is zero
Description : If the width of carriage way is 12.5 metres, outer edge 50 cm higher than the inner edge, the required super elevation is (A) 50 cm (B) 1 in 25 (C) 1 in 400 (D) 1 in 40
Last Answer : Answer: Option B
Description : Two columns 50 cm 50 cm and 60 cm 60 cm carry 80 tonnes and 120 tonnes of loads respectively. The centre to centre distance between columns is 5.00 metres. The permissible bearing capacity of the soil is 20 t ... the foundation slab = 7.00 m (C) Area of footing slab = 11.00 m2 (D) All the above
Last Answer : Option D
Description : Two sources of sound placed close to each other, are emitting progressive waves given by y1 = 4 sin 600 t and y2 = 5 sin 608 t. An observer located near these two sources of sound will ... between waxing and waning (4) 8 beats per second with intensity ratio 81 : 1 between waxing and waning
Last Answer : (1) 4 beats per second with intensity ratio 81 : 1 between waxing and waning
Description : Is 800 cm less or greater than 8 cm?
Last Answer : What is the answer ?
Description : A 10 cm dia steam pipe, carrying steam at 180°C, is covered with an insulation (conductivity = 0.6 W/m.°C). It losses heat to the surroundings at 30°C. Assume a heat transfer co-efficient of 0 ... that of the un-insulated steam pipe (D) Less than the steam pipe with 5 cms insulation
Last Answer : (B) Less than that of the un-insulated steam pipe
Description : For a ribbed slab (A) Clear spacing between ribs shall not be greater than 4.5 cm (B) Width of the rib shall not be less than 7.5 cm (C) Overall depth of the slab shall not exceed four times the breadth of the rib (D) All the above
Last Answer : Answer: Option D