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This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A ligh t ray is incident on air liquid inter face at 45°and is refracted at 30°.What is the refractive index of the liquid For what angle of incidence will the angle between reflected ray and refracted ray be 90°? |
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Answer» Refractive index of liquid = 1.414.Angle of incidence for which the angle between reflected ray and refracted ray is . Explanation:Given:Angle of incidence, .Angle of REFRACTION, .According to Snell's law,where, = refractive index of air. = refractive index of liquid.Since, .Therefore, We know that the angle of incidence is equal to the angle of REFLECTION of light. The angle between between reflected ray and refracted ray is Therefore,PUTTING this value in the Snell's law,This angle for which the angle between reflected ray and refracted ray is is CALLED BREWSTER's angle. |
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| 2. |
What happens when forces are applied in same direction |
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Answer» nds on FORCES, if force B is higher than force A, the OBJECT will move.☺️ |
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| 3. |
Show that pressure and stress have same dimensions |
| Answer» REMEMBER the is a BEAUTIFUL and MOBILE PHONE and | |
| 4. |
which of the following is a one dimensional motion options land landing of an aircraft question to revolving around the sun option three motion of Wheels of a moving train option for train running on a straight track |
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| 5. |
4. A beaker is half filled with water. It is allowedto slip down an inclined plane with angle ofinclination to the horizontal. The level ofwater in the beaker will be :-EFE(1)(2) |
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Answer» Option (2)Explanation:The beaker will move with an acceleration, down the inclined plane. Therefore, in the frame of reference of beaker, a pseudo FORCE will be acting on the water opposite to the motion of the beaker i.e. in the DIRECTION up the inclined plane. To balance this force, the pressure exerted by the water on the opposite wall of the beaker will be more than normal DUE to which the water will shift more towards the wall. Therefore the correct option is Option (2). |
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| 6. |
How does pressure depends on an area? |
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| 7. |
a car moving with an initial velocity of 25 kilometre per hour north has a constant acceleration of the 3 metre per second square south find the velocity after 6 second. |
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Answer» ocity will be 449/16 |
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| 8. |
The speed of a swimmer in still water is 20m/s .the speed of a river water is 10m/s and is flowing due east .If he is standing on the south bank and wishes to cross the river along the shortest path,the angle at which he should make his strokes wrt north is |
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| 10. |
Define polar and non polar in physics |
| Answer» POLAR means those which possess two factors. For example, polar molecules means those which has POSITIVE as WELL as NEGATIVE charge.While non-polar is just an opposite of this. | |
| 11. |
find out the final temperature of 10 grams of water at 30 degree Celsius when it is supplied with 4180 jowls of heat energy |
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| 12. |
if the light from the sun subtend an angle Q at the pole of a concave mirror of focal length f where will it converge also find the diameter of the image |
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Answer» F(f)θ cmExplanation:Here is your answer if U GET the CONCEPT than mark this as a brainliest. |
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| 13. |
Explain static friction ,limiting friction ,sliding friction, rolling friction and fluid friction. |
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Answer» The FRICTION that comes to play against an object which is RELATIVELY in REST on another surface of BODY is CALLED static friction.The friction just before the object will break is called limiting friction. The friction that comes to play against an object which is relatively in motion on another surface of body is called sliding friction.When the body rolls over the surface of another body, it is called rolling friction.When bodies move through fluids, the fluids exert a frictional force called fluid friction .Fluid friction is also called as drag |
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| 14. |
tell mi the dimensional fornula of current and desplacement plz then i will give u make as brainliest |
| Answer» TION:DIMENSIONAL FORMULA of CURRENT=[AT]dimensional formula of DISPLACEMENT=[M°LT°] | |
| 15. |
What is the force of a gravity ana Body of mabes 150 kg lying on thesurface of the earth 34 / 347 Kg radenof earth 8.4x 106m and gravitation. |
| Answer» FIRST you workExplanation:WORK until you GET CORRECT answerthen ASK me or all | |
| 16. |
define the refractive index of transparent medium the speed of the light in a medium of absolute refractive index is 1.5 is 2 into 10 raise to 8 metre per second what is the need of the light in vacuum. |
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Answer» Speed of light in VACUUM is 3.8×10*8m/sec(3×10*8m/sec)EXPLANATION:REFRACTIVE index =speed of light in vacuum /speed of light in that medium1.5=C/2×10*8C=2×1.5×10*8C=3×10*8m/sec=3.8×10*8m/sec |
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| 17. |
I) Polyester ii) PET iii) Rayon iv) Nylon v) Melamine vi) Polythene vii) Bakelite a) kitchenware b) artificial silkc) many monomers d) electric switches e) Code 1 f) popular dress materialg) stronger than any fiber (Match the pair) |
| Answer» 11 22 33 44 55 66Explanation: | |
| 18. |
Take hair, wool, silk, paper, cotton thread, piece of plastic, thread of sweater, piece of rope and carefully conduct a flame test. Based on smell and type of melting classify them as natural, artificial fibres. |
| Answer» H 1=a b=Explanation: | |
| 19. |
When you push a heavy object, it doesn’t move. Explain the reason in terms of net force. |
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Answer» because. MASS of the heavy objectExplanation: when we can APPLY FORCE on any heavy object the mass of that object is more and force is not upto the MARK. so we cannot move it |
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| 20. |
Explain the phenomenon of total internal reflection with one or two activities. |
| Answer» TION:The PHENOMENON of total internal reflection is seen in the Diamond .For the total internal reflection phenomenon it is iimportant that the angle of reflection is greater than Critical Angle .And in the Diamond the angle of reflection is greater than Critical Angle So the LIGHT comes in the diamond is not ABLE to go outside.And diamond shows the phenomenon of total internal reflection .due to this phenomenon Diamond has the SHINING. | |
| 21. |
How do you verify experimentally that the angle of refraction is more than angle of incidencewhen light rays travel from denser to rarer medium. |
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Answer» tion: For this we will do following experiment- Take a glass slab PASS a ray of light through it OBSERVE the light at the boundary of the both of medium from rarer to denser it will BEND towards NORMAL forming an angle known as angle of incidence .After all passing through denser medium that will be glass slab it will move away from normal forming an angle known as angle of refraction.Measure both the angles.We will observe that the angle of refraction is more than angle of incidence as it bends away from normal so it is obvious the angle will be complementary while as the first one is SUPPLEMENTARY as it bends towards normal. |
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| 22. |
A convex mirror with a radius of curvature of 3m is used as rear view in an automobile. If a busis located at 5m from this mirror, find the position, nature and size of the imaze. |
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Answer» udent,# Given -R = 3 mu = -5 m# Solution -Focal LENGTH of mirror is half of its radius of curvature.f = r/2f = 1.5 mNow, using mirror formula -1/f = 1/u + 1/v1/1.5 = 1/-5 + 1/v1/v = 1/1.5 + 1/51/v = (5+1.5) / (5×1.5)v = 7.5 / 6.5v = 1.154 mMagnification is calculated by -M = -v/uM = -1.154/-5M = 0.231Therefore, image is formed at 1.154 m BEHIND the mirror and it will be virtual, erect and diminished (M<1).HOPE this helps you... |
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| 23. |
Is it possible that magnetic field lines intersect each other |
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| 24. |
Is it easy for the party in power to win an election in india? justify your answer in point. |
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Answer» No, winning election for a party is not easy in INDIA as there is multi-party system, there are many parties who stand up in an election in India which provide a large option of representative to PEOPLE to CHOOSE and it MAKES the election too challenging to WIN in India.hope it helps you!! |
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| 25. |
What do we measure to calculate the speed of an object |
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Answer» distance/timeExplanation: |
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| 26. |
A bird is flying down vertically towards the surface of water in a pond with constant. There is a fish inside the water.if that fish exactly vertically below the bird then the bird will appear to the fish to be : a.farther away than its actual distanceb.closer than its actual distancec.moving faster than its actual speedd.moving slower than its actual speed.which of the four options are true? How can you prove it ?dont spam |
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Answer» is in DENSER MEDIUM w.r.t birdand SPEED of light is higher in rare medium as compared to denser mediumV = Vb + MU. Vb★ As we know D (apparent) = D (actuall )/ R.Ihere , observer is fish and object is bird● in this case D(apparent) > D (actual)means,Bird will APPEAR farther away from its actual distance.D (apparent ) = mu × D (actual )★ Option a is correct !Both option a and c is correcthappy to help !:) |
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| 27. |
A machine gun fires 240 bullets per minute with a certain velocity. If the mass of each bullet is 10 gm and the power of the gun is 7.2 kW, thevelocity with which each bullet is fired must be |
| Answer» PLS SEE the ATTACHMENT | |
| 28. |
Explain the mechanism of production and reception of sound in human beings |
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Answer» Generally SPEAKING, the mechanism for generating the human voice can be subdivided into three parts; the lungs, the vocal folds within the LARYNX (voice BOX), and the articulators. The lung (the pump) must produce ADEQUATE AIRFLOW and air pressure to vibrate vocal folds (this air pressure is the fuel of the voice). |
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| 29. |
"TOU ypu. Multiple Choice QuestionQuestion No. 3Which of the following statement is true, if material A has critical angle in and material B has critical angle is (g>IA).(i) Light can be totally internally reflected when it passes from B to A(ii) Light can be totally internally reflected when it passes from A to B(iii) Critical angle for total internal reflection is ig-la(iv) Critical angle between A and B is, sin-sin ig)(i) and (iii)(il) and (111)(i) and (iv)(ii) and (iv) |
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Answer» is AEXPLANATION:MAY it's HELP U........... |
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| 30. |
Who is an insaan plz answer in detail about history of humans |
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Answer» Hy mateExplanation:one man who FITS into the term of Insaan. Insaan is USED by other ANIMAL denoting to the member of mankind. The word insaan (इंसान) is originally from the URDU language.I hope it will HELP you ✌✌✌❤❤❤ |
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| 33. |
What is total reflecting prism. name the instruments in which it is used. |
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Answer» A TOTALLY reflecting prism is that which has one of its angle EQUAL to 90 DEGREE and each of the remaining TWO angles equal to 45 degree here the phenomenon of total internal reflection is used. The CRITICAL angle of glass is 42 degree..... |
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| 34. |
State krichhoff current rule |
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Answer» beautiful little place and a LOVELY atmosphere and the service and a delicious meal with the family of a friend of a group and I love to try a few things of the YEAR I think the price of a fair share a fun experience at the MOMENT and a MUST to a local |
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| 35. |
Power developed by particle is 10 watt, if force applied is F = ai+2 j N and velocity V = (i+j)m/s. What is value of a |
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Answer» 8Explanation:°•° P=F•v=> 10=[a(i) + 2(J)]•[(i) + (j)]=> 10= a + 2=> a=8 |
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| 36. |
An object is placed at a distance of 10cm from a convex mirror of focal length 15cm. Find theposition and nature of the image. |
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| 37. |
Have you ever observed the image of the sky in rain water pools on earth? Explain the reflectionof light in this context. |
| Answer» FIRST PLAY PING MOBILE and clash of clans | |
| 38. |
Collect information about the history of spherical mirrors in human civilaization. |
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Answer» The first mirrors used by people were most likely pools of water, or water. The earliest manufactured mirrors were pieces of POLISHED stones.Parabolic mirrors were described and studied in classical antiquity by the mathematician Diodes in his work on burning mirrors.Ptolemy conducted a number of experiments with curved polished iron mirrors. He also discussed plane, convex, concave and spherical mirrors in his optics.In China, people began making mirrors with the USE of silver mercury amalgams as early as 500 AD.In 16th CENTURY, Venice, a BIG city formed for its glass making expertise, became a centre of mirror production using this new technique.The invention of the silvered - glass mirror is created to German CHEMIST Justus Von Liebig in 1835. |
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| 39. |
Write the balanced chemical equations for the following reactions. a) Zinc + Silver nitrate J Zinc nitrate + Silver. b) Aluminum + copper chloride J Aluminum chloride + Copper. c) Hydrogen + Chlorine. J Hydrogen chloride. d) Ammonium nitrate J Nitrogen + Carbon dioxide + water. |
| Answer» EQUATION is BALANCED 2. 2Al +cucl2 GIVE rise 2Alcl +cu3.2H +CL2 gives rise 2Hcl | |
| 40. |
What changes do you notice in the reading of thermometer as timepasses by?when you insert a thermometer in it. |
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Answer» A thermometer is used to measure temperature during fever. During fever, the mark of mercury increases according to the heat it receives with TIME and stops increasing when it doesn't NOTE any change in temperature.It is mainly inserted into the mouth below TONGUE, or below arm. A thermometer has a mercury as a fluid inside it. It is a good CONDUCTOR of heat and doesn't get stick to the wall of thermometer BULB. |
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| 41. |
In the refining of silver, the recovery of silver from silver nitrate solution involved displacementby copper metal. Write the reaction involved. |
| Answer» COPPER is displaced to SILVER so the above chemical equation Ag(No3)2+ cu GIVE rises Cu(No3)2 +Ag | |
| 42. |
What could be the reason for this change?when few drops of spirit on your palm using a dropper. |
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Answer» we FEEL coolness because the spirit evaporates very fast. EVAPORATION CAUSES cooling effect.hope it HELPS and pls mark as BRAINLIEST:) |
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| 43. |
Experiment:Take a beaker of water, keep it on the burner .Note the readings of thermometer for every 2 minutes. • Did you see any rise or fall in the level of the surface of the water, in the beaker? Why? • Does the temperature rise continuously? • When does the rise in temperature of water stop? |
| Answer» ENT : Take a beaker of water, keep it on the burner .Note the READINGS of thermometer for every 2 minutes.• Did you see any rise or fall in the LEVEL of the surface of the water, in the beaker? Why?There was a fall in the level of surface of the water, as some water was evaporated. Evaporation is a phenomenon occurring at all temperatures. • Does the temperature rise continuously?The temperature RISES steadily till it reaches a certain temperature, after which there is no rise in temperature. • When does the rise in temperature of water STOP?The rise in temperature of the water stops when the water attains its Boiling point. At the temperature of Boiling point, All the heat given to water is used increase the intermolecular forces and to change the state of water from liquid to gas | |
| 44. |
• What change did you notice in the reading of the thermometer? (mercury level)? if you keep it in the hot ,and cold water seperately. |
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Answer» To measure temperature during fever a thermometer is USED. When put inside hot water the mark of MERCURY increases according to the heat it receives with time and stops INCREASING when it doesn't note any change in temperature.When INSERTED in cold water the mark of mercury decreases.It is mainly inserted into the mouth below tongue, or below arm. A thermometer has a mercury as a fluid inside it. It is a good conductor of heat and doesn't get stick to the wall of thermometer bulb. |
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| 45. |
A truck tows a trailer of mass 1200 kg at a steady speed of 10 m/s on a level road. The tension in the coupling is 1000 N, the power expanded onthe trailer is |
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Answer» 10000 wattExplanation:We have been given Tension in the COUPLING is 10000 N And speed of V = 10 m / sAnd TRUCK trailer mass is 1200 kg Now we know that Power EXPANDED on the trailer is = Tension in coupling × speedPower expanded on the trailer is = 1000 × 10 Power expanded on the trailer is = 10000 watt |
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| 46. |
What is different distance covered by an object in same interval time |
| Answer» TION:MAGNITUDE of DISPLACEMENT... | |
| 47. |
A current of sA passingthroughcection4mm, If the densityof ein. |
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Answer» kzrj. xjxozk. xxj COLT xtk |
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| 48. |
2) Draw a ray diagram showing image formation by a convex mirror a) between optical centre & focus6) between focus & twice the focus of lensat twice the focal length of lens.do At Infinitye At focus of lens. |
| Answer» FIRST thing is that convex MIRROR always form a virtual image..... Between optical centre & focus LIES the centre of curvature. | |
| 49. |
Let C = A + B then (a) 1C is always greater then | A|(b) It is possible to have IČKI Ā| and ICIIBU(c) C is always equal to A + B(d) C is never equal to A + B |
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| 50. |
find out the change in temperature of hundred grams of water when 4180 joules of energy is given to it |
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Answer» 10°C or KExplanation:If you USE the FORMULA Q = mc∆t where, m = mass of WATER c = specific heat CAPACITY of water which is 4.18 J g-¹ °C-¹, you can find the answer to be 10°C CHANGE in temperature.Hope this is helpful! |
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