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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. |
What does slope of V-I graph and slope of I-V graph represent? |
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Answer» Answer: here u go Explanation: slope is vi GRAPH gives r i.e resistance slope is iv graph gives 1/ r i.e 1/ resistance hope this HELPS u..... mark me as BRAINLIEST..... FOLLOW ME.... |
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| 2. |
Mentiom two common properties of radiation and visible light. |
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Answer» they both are ELECTROMAGNETIC RADIATION |
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| 3. |
Why green leaf sinks and dry leaf floats in water? |
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| 4. |
Samtal darpan par abhilamb aaptan ke liye parawartan kon ka maan kitna hota hai |
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Answer» Diioourettrwd5 tahjeeb CH |
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| 5. |
A wire of resistance 20ohm is bent in form of closed circle what is effective resistance between two points at road end of any diameter of circles |
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| 6. |
4.4 How can an erect and magnified image be formed with the help of a convex lens?With the help of which type of lens long-sightedness can be rectified? |
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Answer» Ques) How can an erect and magnified image be formed with the help of a convex LENS? → Positioning object between Origin and FOCUS gives erect and magnified image. (the ray diagram for this answer is in ATTACHMENT) Ques) With the help of which type of lens long-sightedness can be rectified? → Long sightedness (also called Hypermetropia) can be cured by using Convex Lens. The convex lens used is of such power that it forms the image at the near point of hypermetropic eye. [NOTE: Near point of hypermetropic eye > 25 CM] |
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| 7. |
What does psi stand for in units dealing with pressure? |
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Answer» =PSI DEFINITION: PSI is a UNIT of pressure expressed in pounds of force PER square INCH of area. It stands for Pounds per Square Inch. 1 PSI = 6894 Pascals = 0.070 atmospheres = 51.715 torr.✔✔ |
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| 8. |
What is the si unit of average velocity in physics? |
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Answer» Answer: |
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| 9. |
What should be the laser wattage for using it in broad daylight? |
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Answer» On many things with dust in the air you can see a 5mw lasers beam but with no dust you can't see a 1w GREEN lasers. 1.Another useful comment from lman. :whistle: Again, lman is not correct. Even if you have very. 2.For comparing brightness as the human eyes see it, you can use rhd's HANDY tool here: Beam. 3.I can see the 5mm diameter beam of 600mW 532nm LASER in the ROOM without SMOKE during sunny. 4.i have a simular question,,,how strong of a 405nm laser would have the same brightness as a 5mw.✔✔ |
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| 10. |
2.BRTA truck traveling due north at 20 m/s turns east and travels at the same speed. The change in velocity is x vy m/s south east. Find |
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Answer» Answer: Hey there! FIND out ur solution below! [ ☆ Refer to the attachment below for the FIGURE ] So by Pythagoras theorem , change in velocity is given by the hypotenuse As : __________ |Δv| = √( v1^2) +(v2^2) __________ |Δv| = √( 20^2) + (20^2) = 20√2 m/s . The DIRECTION is SOUTH -WEST ... Read more on Brainly.in - brainly.in/question/1817018#readmoreHey there! Find out ur solution below! [ ☆ Refer to the attachment below for the figure ] So by Pythagoras theorem , change in velocity is given by the hypotenuse As : __________ |Δv| = √( v1^2) +(v2^2) __________ |Δv| = √( 20^2) + (20^2) = 20√2 m/s . The direction is south -west ... |
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| 11. |
Can an ammeter be placed anywhere in an electric circuit |
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Answer» Answer: from what I've READ it should be CONNECTED in SERIES as it has NEGLIGIBLE resistance |
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| 12. |
A motorcyclist drives from A to B at a uniform speed of 40km/hr and returns back with a speed of 20 km/hr. Find the average speed. |
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Answer» Answer: 30 km/hr. Explanation: AVERAGE = SUM of OBSERVATION NUMBER of observation |
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| 13. |
list the formulas of motion, force and laws of motion, gravitation, work and energy, flotation and sound. also list the SI units and memories them. |
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Answer» force=m×a. work=displacement×time taken laws of MOTION; 1ST law=v=u+at 2nd law=s=u+1/2at^2 |
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| 14. |
an object covers 40 kilometre in half hour and next 40 km in 1 hour calculate average speed in kilometre per hour |
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Answer» An object covers 40 kilometre in half hour and next 40 km in 1 hour calculate average SPEED in kilometre per hour. Case - 1 : Distance covered = 40 km TIME Taken = 1 / 2 HR = 0.5 hr Case - 2 : Distance covered = 40 km Time Taken = 1 hour Total distance travelled = 80 km Total Time taken = 1.5 hr Average speed = Total Distance travelled / Total Time taken Average Speed = 80 km / 1.5 hr = 800 km / 15 hr = 53.33 km / hr ✔✔ Hope it HELPS ✔✔ ✨♥Be Brainly...✌✌✌❤✨ ✔✔ Please mark as the ✏✏ and ✏✏ if u liked ✔✔ |
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| 15. |
Neeta left a Steel glass filled with chilled water on dining table. After few seconds she observe some water droplets outside the glass. Name the scientific phenomenon responsible for some |
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Answer» It is DUE to condensation Condensation is the phase CHANGE from GAS to liquid When a cold soft drink bottle is kept in open air,the water vapour present in the surrounding air condenses on the bottle. The water molecules are slowed down and stick to the surface is cold. hope it is helpful |
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| 16. |
If the units of force, energy and velocity are 10N, 100 J and 5 m:-1, find the units oflength, mass and time,[Ans. 10m,4kg, 2s] |
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Answer» LENGTH =metre mass =kg time=seconds |
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| 17. |
You are going to delhi by car you look at Mile stone saying delhi 5 km Sharp 6 pm At 6.05 you see Mile stone saying delhi 1 km away. Find the speed of your car in km/ minute |
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Answer» Answer: 0.8 KM/ minute Explanation: since 4 kilometers are TRAVELLED by the car in 5 minutes, speed = DISTANCE / time = 4 / 5 = 0.8 K.M / min |
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| 18. |
Why is neon is an insert gas |
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Answer» Answer: |
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| 20. |
The train starting from rest attains a velocity of 20m/s in 2 minutes. Assuming that the acceleration is uniform find acceleration and distance travelled |
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Answer» Answer: ACCELERATION is 0.16 METER per SECOND square and distance travelled is 1152 mete |
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| 21. |
What are the m l and t dimensions in newton's gravitational law? |
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Answer» =Units and DIMENSIONS. precipitation has the dimension length [L] and the unit cm or mm or inch; many quantities KG m-3. force. [M L T-2 ]. NEWTON. N. kg m s-2. PRESSURE. [M L-1 T-2].✔✔ |
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| 22. |
What problems are associated with the construction of large dams? |
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Answer» =Construction of dams have RESULTED in problems like excessive SEDIMENTATION and SALINITY, waterlogging, sudden floods, soil erosion, large scale deforestation, extinction of species, health hazards, displacement of local communities and LOSS of livelihood of tribal communities.✔✔ |
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| 23. |
What is the uncertainty in the location of a photon of wavelength? |
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Answer» =Δp=hΔλ=hΔνc is the uncertainty in momentum for PHOTONS from the de BROGLIE relation.After realizing that Δλ=hΔp , the rest FOLLOWS from there. λ is the wavelength in m and ν .✔✔ |
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| 24. |
15. Compute the mass in grams of KCIO, necessary toproduce 67.2 litres of oxygen at S.T.P. according tothe reaction2KCIO, (s) — 2KCI (s) + 30, (9)[Molecular weight of KCIO, = 122.5](1) 96(2) 2(3) 122.5(4) 245not |
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Answer» your answer is 245 gram |
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| 25. |
A car is travelling at 20m/s along a road. A child runs out into the road 50 mahead and the car driver steps on the brake pedal. What must be car'sdeceleration if the car is to stop just before it reaches the child? |
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Answer» I am not sure about the answer but STILL I TRIED just CHECK it once |
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| 26. |
a train travelling at 72km/h decelerate unit formally at 2m/s^2.how much time dose it takes to stop |
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Answer» Explanation: |
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| 27. |
3.142 * 9.8 answer the question |
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Answer» Answer: 30.7916 Explanation: 3.142 × 9.8 =30.7916 |
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| 28. |
two trains each of length 150 metre are moving in opposite direction of 36 km per hour and 72 kilometre per hour respectively time taken by them to yes cross Each Other completely is |
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Answer» Answer: => Two TRAINS each of LENGTH 150 metre are moving in opposite direction of 36 km per hour and 72 kilometre per hour respectively. =>So, speed of first train =36km/hr = 36*1000/3600 m/s = 10 m/s Speed of second train 72 km/hr = 72*1000/3600 = 20 m/s => Since train are running towards each other so relative speed = 10 + 20 m/ s = 30 m/s => Total distance = 150 + 150 =300 m => Speed = distance /time 30 m/s = 300/t t = 300 / 30 t = 10 sec Thus, time taken by these two train to cross Each Other completely is 10 sec. |
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| 29. |
What heppen when we connect both positive and negative each other ?? |
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Answer» Attraction happens between the both Explanation: YES it will work in a circuit because it will work as a potential DIFFERENCE |
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| 30. |
If a car starts from rest has an acceleration that increases linearly with time as a = 2t here t is in second then the average velocity for first 3 seconds |
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| 31. |
81.43 *7.213*98.13 answer plz |
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Answer» Answer: 57,637.1057 Explanation: 81*7.213*98.13=57,637.1057 |
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| 32. |
two cars A and B are approaching Each Other head on with speed 20 metre per second and 10 metre per second respectively their separation is X then A and B start breaking at 4 metre per second square into metre per second square respectively minimum value of X to avoid collision is |
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Answer» Dear Students, ● Answer - X = 62.5 m ◆ Explanation - Let s1 & s2 be stopping distances for CAR A & car B respectively. Applying Newton's 3rd law of kinematics to car A, v1² = u1² + 2as 0 = 20² + 2×(-4) × s s1 = 400 / 8 s1 = 50 m Applying Newton's 3rd law of kinematics to car B, v2² = u2² + 2as 0 = 10² + 2×(-4) × s s2 = 100 / 8 s2 = 12.5 m Therefore, minimum separation between cars at the time of breaking is - X = s1 + s2 X = 50 + 12.5 X = 62.5 m Hope I was useful.. |
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| 33. |
Hi baby give me the answerWhat is physics and it's uses . Need for homework.please help me |
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| 34. |
a driver driving a truck at a constant speed of 20m/s suddenly saw a parked car ahead of him by 95m. He could apply brake after sometime to produce retardation of 2.5m/s.An accident was avoided. his reaction time is |
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Answer» Answer: The REACTION time= 11.832 seconds Explanation: Let us FIRST CALCULATE the time needed for the truck to come to rest , that is final velocity v=0 intial velocity u=20m/s, retardation=2.5m/s² time taken t v=u- a×t t= 20÷2.5 t=8s s= u×t- (a×t²)÷2 95= 20t- 1.25t² 1.25t² -20t -95=0 t=19.8s, is the maximum time AVAILABLE to avoid the accident and the time needed to bring the vehicle to rest is 8s therefore the reaction time of the driver = 19.8 - 8 =11.832 s |
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| 35. |
Ghar mein ghar mein pakshiyon ke darshan dekh dekh Chinta prakat karte hue prakat Karta hua |
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Answer» ........................ |
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| 36. |
Write the steps involved in crop production with digrams |
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Answer» Answer: Explanation: Steps are below- <1> ploughing or tiling the field <2> Irrigating the field <3> SCATTER the seeds in the field <4>Add MANURE to the field <5>Harvest the crops ,,.....etc I only give the steps FRIEND not the diagram so SORRY for this |
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| 37. |
A particle P is moving with a constant speed of 6m/s in a direction 2i-j-2k. When t=0, P is at a pointwhose position vector is 3i-4j-7k. Find the position vector of the particle P after 4 seconds. |
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Answer» , Explanation: |
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| 38. |
A car travelling at 20km/h speed up to 60km/h in 6 second what is its acceleration? |
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Answer» Answer: 24,000km/hr^2 or 1.246105919003m/s^2 Explanation: given, initial velocity, u = 20kmph final velocity, v = 60kmph time , t = 6 SEC = 0.001666666666 hour acceleration, a = v-u/t a = 60-20/0.001666666666 a = 40/0.001666666666 a= 24,000km/hr^2 or 1.246105919003 m/s^2 hope this HELPS you mark me as BRAINLIEST.... FOLLOW ME.... |
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| 39. |
The volume of a sphere v is increasing at a constant rate dv/dt =k.at the moment when volume is v0 the rate of change of radius? |
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Answer» The VOLUME of sphere V is increasing at the constant rate , dV/dt = k......(1) Let radius of sphere is r. from FORMULA of sphere , V = 4/3 πr³ differentiating both sides with respect to TIME, dV/dt = d(4/3 πr³)/dt = 4/3π × d(r³)/dt = 4/3 π × 3r² dr/dt [ from application of differentiation, if y = f(x)ⁿ, then dy/dx = nf(x)ⁿ-¹ ] = 4πr² × dr/dt so we get , dV/dt = 4πr² dr/dt from equation (1), dV/dt = k = 4πr² dr/dt or, dr/dt = k/4πr² ....(2) a/c to question, at the moment volume of sphere is v0 . then radius of sphere at that moment, r = now putting value of r in equation (2), we get, = |
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| 40. |
What is electrode potential and standard electrode potential? |
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Answer» Explanation: ELECTRODE POTENTIAL : the potential ASSOCIATED with each electrode is called electrode potential standard elcetrode potential : the potential associated with each electrode under ONE molar concentration at 298kelvin and 1atm pressure is called standard electrode potential . |
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| 41. |
What we eat to remove spectacle which have high power lens? |
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| 42. |
Write the three conditions necessary to form a shadow |
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Answer» Explanation: An AREA of DARKNESS FORMED by an obaque object obstructing light is CALLED shadow. Things which are required to form a shadow are: 1-A source of light. 2-An obaque object. |
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| 43. |
Wrte various uses of heating effect of electric current |
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Answer» Answer: The heating effect of ELECTRIC current is USED in following APPLICATIONS: Electric BULB: In an electric bulb, the filament of bulb GIVES light because of heating effect of electricity. |
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| 44. |
Why total electron content high for southern hemisphere |
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Answer» Furthermore, the WINTER anomaly is also observed in the EQUATORIAL AREA of the northern HEMISPHERE and high latitudes of the southern. |
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| 45. |
What is a car pooling |
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Answer» Answer: Sharing a public transport by a GROUP of people who are TRAVELING to a similar LOCATION |
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| 46. |
How does atmosphere get charged?(Static charge) |
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Answer» through the CHARGES in CLOUDS and IONOSPHERE |
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| 47. |
Position of a particle moving along x-axis is given by. The distance travelled by the particlefrom t 0 to t 2 is(1) 0 (2) 8 (3) 12 (4) 16 |
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Answer» ............................... |
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| 48. |
Which vector is the perpendicular to the vector is equals to 2 i + 3J + 4K |
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| 49. |
Bus A covered 75 m in 5 s. Bus B covered 169 m in 13 s .A) which Bus covered a greater distance?B) which Bus has a higher speed? |
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Answer» a. BUS A covered a greater distance b. Bus A has higher SPEED.. |
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| 50. |
In the given figure, what is the reading of the spring balance ?(1)10N(2) 20 N(3)5N |
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Answer» PLEASE UPLOAD the ATTACHMENT. |
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