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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. |
Sea breeze is due to thhe change in density of air with_____. |
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Answer» change in temperature |
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| 3. |
A tin-cutter is used to cut a thin metalliccircular plat. Then the angle between the forces which are applied at both the handle is ________ |
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Answer» `30^(@)` |
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| 4. |
The device used to measure electric current in a cir-cuit is called "_____" |
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Answer» speedometer |
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| 5. |
Find the heat energy required to raise the temperature of 5 kgwater at 80^(@)C to 100^(@)C (Specific heat of water is 1 calg^(-1)^.@C^(-1)) |
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| 6. |
A freely suspended magnet rests in : |
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Answer» east-west DIRECTION |
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| 7. |
A sceince student in a science fair demonstrated the existence of water and ice in a same container at 0^(@)C and water and steam in a same closed container at 100^(@)C explain how is it possible to have two different states of matter at the same temperature |
| Answer» Solution :When we SUPPLY heat energy to ice its temperature increase till reaches `0^(@)C` but CONTINUES to be ice only on further supply of heat energy there is no rise in temperature but ice converets into water at same `0^(@)C` temperature .Heat supplied is used for phasetransfor mation (State CHANG) only similarly wter at `100^(@)C` on supplying heat energy converts in to steam WITHOUT any change in temperauter .The heat absorbed is utilized only to change the state of matter from liquid state to gaseous state hence ice and waterexist in contact at `0^(@)C` and water and steam exist in contact at `100^(@)C` | |
| 9. |
What are quartz clocks? Which one is more accurates, the clock using pendulum or the quartz clock? |
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| 10. |
Venkat wentto a factory workshop where he saw hot metallic square plats. He measured the surface area of the plats. How did he do it? |
| Answer» Solution :If a metallic plate is hot, we cannot TAKE the READINGS by director, method. So, we use a divider to measure it. Adjust the screw of the divider and placce the pointed ends over the metallic plate and measure the DISTANCE between the two pointed NAILS by comparing it with a meters scale. This gies the length (l) of the side Now are can be determiened as `A=l^(2)` | |
| 11. |
Explain in detail about periodic motion and non-periodic motion. |
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| 12. |
Match the following: {:("Column A","Column B"),((A)"Laterally inverted image",(" ")(a)"Convex mirror"),((B)"Light rays emitted from a candle",(" ")(b)"Parallel beam of light rays"),((C)"Concave mirror",(" ")(c)"Convergent light rays"),((D)"Reflected light rays from a concave mirror"," when the object is at the centre of curvature of the mirror"),(,(" ")(e)"Inverted and real image"),(,(" ")(f)"Divergent light rays"):} |
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Answer» `Atoa,Btof,Ctoe,Dtoc` B-f The LIGHT rays emitted from a CANDLE are diverted light rays. C-e An inverted real image is formed only in a concave mirror. D-c The REFLECTED light rays from a concave mirror, when the object is placed at the center of curvature, converge at the same point. These are convergent light rays. |
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| 13. |
Sound is a form of energy. |
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Answer» |
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| 14. |
State True or False. Substances which allow charges to pass through them are called conductors. |
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Answer» |
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| 15. |
What happens when a current carrying metallic comb is placed close to small iron filings? |
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Answer» iron filings will fly AWAY from the COMB, when switch is turned off. |
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| 16. |
For each of the equation four choices have been provided. select the correct alternative In solids generally the heat is transferred by |
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Answer» CONDUCTION |
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| 18. |
Potential energy changes into kinetic energy when it is put to use. True/False. |
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Answer» |
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| 19. |
If a girl runs around a circular track of length 400 m and comes back to the initial point in 40 s, what would be her speed and velocity? |
| Answer» SOLUTION :SPEED 10 m/s, VELOCITY ZERO | |
| 20. |
The image formed by a plane mirror is ...... and .............. |
| Answer» SOLUTION :ERECT, VIRTUAL | |
| 21. |
Generally, a woman's voice has a higher pitch than a man's voice. |
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Answer» |
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| 22. |
State True or FalseThe temperature of boiling water can be measured by a clinical thermometer |
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Answer» |
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| 23. |
When pendulum A completers 20 oscillations, pendulum B completers 30 oscillations, what is the ratio of their periods? |
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| 25. |
A physiscs student performed an experiment by taking a beaker with 1 l of water oat 30^(@)C and dropping an iron sphere with temperature 90^(@)C in it .After sometime student tmeasure their equailibrium temperature as 48^(@)C .If the density of iron sphere is 7870 kg m^(-3) then find the volume of the iron sphere specifice heat of iron is 0.110 jcal g^(-1@)C^(-1) |
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Answer» Solution :Mass of l of water =1 KG `(Deltat)_(W)=48-30=180^(C )` `(Deltat)_(iron) =90 -48=42^(@)C` HEAT absorbed by water =Heat LOST (removed ) from iron `((msDeltat_(w)))/((sDeltat_(iron)))((1000xx1xx18)/(0.110xx42))=3.896 kg` density = `(mass)/(V)` `V=(m)/(d)=(3.896)/(7870)=4.95xx10^(-4m^(3)` |
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| 26. |
The phenomenon of light which is responsible for vision is ______. |
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Answer» REFRATION |
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| 27. |
Triangulation method is used for measuring very long distances. |
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Answer» |
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| 28. |
A scientist took a physical balance and an object of weight 10 kgwt from the Earth to the surface of the Moon. There on the Moon,if he placed this 10 kgwt object on one of the pansof physical balance, find the mass of the object required to balance the physical balance. |
| Answer» SOLUTION :MASS of the OBJECT is 10 kg. So, mass of the object required is equal to 10 kg. | |
| 29. |
Assertion (A): The volume ofa given mass of water is more at 0^(@)C when compared to water at 4^(@)C Reason (R ):Water expands when its temperature is incresed form 0^(@)C to 4^(@)C |
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Answer» both a and r are true and r is the corret expantion of a |
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| 30. |
In symbolic representation of an electric cell, the longer and shorter vertical lines represent "______" and "________" terminal, respectively. |
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Answer» |
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| 31. |
Which of the following is a poor conductor of heat ? |
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Answer» vacuum |
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| 32. |
Sound cannot travel in : |
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Answer» gases |
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| 33. |
The speed of light in vacuum is 3 xx 10^8 ms^(-1) |
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Answer» |
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| 34. |
We can distinguish a shrill sound from a flat sound by its : |
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Answer» AMPLITUDE |
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| 36. |
.............. do not pass electricity through them. |
| Answer» SOLUTION :INSULATORS | |
| 37. |
Why cannot a mirror whose surface is rough produce a clear image? |
| Answer» Solution :The light that gets REFLECTED ata rough and uneven surface goes in different direction, due to irregular REFLECTION. This is the reason why a MIRROR WHOSE surface is rough cannot produce clear image. Any surface that is smooth can produce a clear image because of regular reflection that takes place at its surfaces. | |
| 38. |
Arrange the following steps in a sequence of find the vlume oof an irregular shaped solid body. (A). The irregular shaped solid is tied with the thread and is lowered into the measuring cylinder. (B). A measuring cylinder with graduations in millilitre or cubic centimetrer is taken. (C). The level of water in the measuring cylinder rises after immersion of the solid. (say V_(2)) (D) First, it is filled with water to a certain level of volume. (say V_(1)) (E). The volume of the stone is equal to the difference between the volume of the water before and after the immersion of the stone. (V_(2)-V_(1)). |
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Answer» ABCDE |
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| 39. |
The width of a stream is determined with the help of triangulation method. Arrange the followig steps in a sequence of explain the process to find the width. (A). Fix a certain startionary object like tree on the other bank of the strem. (B) Take two pins (P_(1) and P_(2)) an fix P_(1) and P_(2) at one vertex of the drawing board such that pins and tree are on the same straight line. (C) Select two positions (say A and B) on the ground and the horizontal distance between them is noted. Let it be 'D' m. (D) Repeat the same process at position 'B' with other two pins (P_(3) and P_(4)) at other vertex of the drawing board. ltBrgt (E) Take a drawing board and paste a white paper on it. (F). Fix the board at position 'A' such that one edge is directed along 'AB'. (G) Now, produce two straight lines and let meet at point 'P'. Complete the triangle with P, P_(1) and P_(3). Measure the distnace between P_(1) and P_(3) say d. Then (D)/(d) gives the actual distance on ground for every oen cm on the drawing board. (H) Now the width of the river will be equal to the distance from midpoint of P_(1) and P_(3) (let it be P_(5)) ad P multiplied by (D)/(d). |
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Answer» EACFBDGH |
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| 40. |
1000 kg of water occuplies |
| Answer» Solution :1000 kg of water OCCUPIES 1000 l as DENSITY of water is 1000 kg `m^(-3)`. | |
| 41. |
We use cell as the source of electricity to run an electric immersion rod. |
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Answer» |
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| 42. |
__________ measuresthe distance moved by a vehicle. |
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Answer» |
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| 43. |
Arrange the following steps in sequential order to constructor a celsius thermometer. (a) lower fixing point is marked by placing the bulb of he thermometer in pure melting ice (b) a thin capillary tube covered with a thick glass stem and a providing a funnel is taken (c ) the distance between upper fixing point and lower fixing point is divided in to 100 equal parts and calibrated (d)upper fixing point is marked by placing the bulb of the thermometer in boiling water (e ) while pouring the mercury in the tube palce the mercury buylb in hot water bath to remove air bubbles |
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Answer» befadc |
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| 45. |
1000 kg of water occuples how much volume? |
| Answer» Solution :1000 KG of water occupies 1000 l as density of water is 1000 kg `m^(-3)`. | |
| 47. |
Rainbow is observed when the sun is |
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Answer» |
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| 49. |
Explain in detail about the different kinds of motion. |
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