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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. |
The four resistance 20,40,(20+x),80 respectively wheatstone bridge. Find the value of "x" |
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| 2. |
A body is projected with initial velocity (2i cap +2j cap ) m/s the horizental range is approximately |
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Answer» Not SURE about ,the answer |
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| 3. |
The value of acceleration due to gravity is maximum at... |
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Answer» EQUATOR... I.e 9.83 m/s sq. hope it HELPS.. |
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| 4. |
What will be the ratio of root mean square of molecule of an ideal gas at 270 k and 30 k |
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Answer» Answer: 3 Explanation: RMS velocity(C)=√3RT/M C is directly proportional to Square root of temperature the ratio is √270/30=√9 The final answer is 3 |
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| 5. |
the angular velocity of the wheel increases from 1200 to 4500 rev/min in 10 s with constant angular accelaration . how many revolutions were made during this time? |
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Answer» if you LIKE it then MARK it as brainlliest and if POSSIBLE then FOLLOW me THANKS
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| 6. |
A ship is moving at a speed of 56 km per hour.One second later it it is moving at 58 km/h what is it is acceleration |
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Answer» Answer: Method I: Initial speed=u=56km/h=56 X 5/18=15.55m/s Final speed=v=58km/h=58x5/18=16.11m/s Time=t=1sec ACCELERATION=a=? as we know that acceleration is RATE of CHANGE of velocity. a=(v-u)/t =(16.11-15.55)/1 =0.56 m/s² Method 2: Initial speed=u=56km/h Final speed=v=58km/h Time=t=1/60x60 h acceleration=a=? as we know that acceleration is rate of change of velocity. a=(v-u)/t =(58-56)/1/60*60 =2x3600 =7200 Km/h² ∴ Acceleration is 0.56 m/s² or 7200 Km/h² Read more on Brainly.in - brainly.in/question/22525#readmore |
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| 7. |
How much heat energy is required to change 274.2 g of ice at 0c to water at 0c? |
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Answer» Answer: 0 Kcal______(((_(_____ |
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| 8. |
Direckonaldefine directional property of magnet |
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Answer» The law states that the force of ATTRACTION or REPULSION between two magnetic POLES is known as directional proportional of magnet I hope you will be able to understand |
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| 9. |
car increases its speed from 20 km per hour to 50 km per hour in 10 seconds. what is its acceleration |
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Answer» Answer: 3km/s |
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| 10. |
Can the magnification of a concave mirror be positive . justify your answer? |
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Answer» YES....______________________ |
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| 11. |
Dispersion is caused by refraction and not reflection. Why? |
Answer» HLO MATE......‼⬇️ Dispersion is caused by UNEVEN bending (refraction) of various COLORS of light while changing MEDIUM. ... While in case of reflection, the light doesn't change medium, it BOUNCES back from the surface of a different medium following the laws of reflection. |
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| 12. |
Give supporting arguments for fire is harmful |
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Answer» Fire is useful as we can cook with the heat produced by fire. some times we can keep ourselves warm by sitting in FRONT of fire for sometime.fire is ALSO used to burn the crackers. |
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| 13. |
A body of mass 0.5 kg experience a forceF = (2 + 3x2) N where x (in metre) is thedisplacement from origin. It is released to movealong x-axis from origin then its initial accelerationis(1) 2 m/s2(3) 4 m/s2(2) 10 m/s2(4) Zero |
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Answer» Explanation: F=ma a=F/m a=(2+3*2)/0.5 a=8/0.5 a=4m/s² mark me as brainlist..... |
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| 14. |
Determine the energy loss if substance (density = 1170 kg/m^3 and dynamic viscosity = 0,4029 Pa*s) flows 28 meter through a 165 mm inside diameter pipe with an average velocity of 3,2 m/s.Express result in meter [m]. |
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Answer» Viscosity = (2 x (ball density – liquid density) x G x a^2) ÷ (9 x v), where g = acceleration due to gravity = 9.8 m/s^2, a = RADIUS of ball bearing, and v = velocity of ball bearing through liquid. Plug your measurements into the equation to calculate the viscosity of the liquid. |
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| 15. |
In uniform circular motion, velocity of particle is:A) constantB) variable in magnitudeC) variable in directionD) both a) and b) |
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Answer» C) variable in direction ✓ Because the MAGNITUDE remains the same but the direction of the body keeps changing! If the direction changes the velocity changes. If the velocity changes, ultimately the acceleration changes. |
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| 16. |
Two masses A and B having mass m1 = 1 kg and m2= 2 kg are placed on a rough horizontal plane and connected to a string. B is connected to another string which passes over a massless frictionless pulley and connected to a mass m3. Calculate I) the minimum value of m3 required to move the blocks. ii) The value of T1 and T2 when m3 = 1 kg. Coefficient of friction is 0.1. |
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Answer» M2 m2g- T = m2 a T- m1g = m1a Solving these equations we get, a= g/3 Distance travelled by each block S = ut + (1/2)at^2 = 20/3 m Applying centre of mass formula (m2 x s – m1 x s)/(m2 + m1) = 20/9 Hence the ratio between the masses is 20/9. Also LEARN more A string of mass 2.5 kg is under a tension of 200 N. The length of the stretched string is 20.0 m. If the transverse sudden STOP is struck at ONE end of the string, the disturbance will reach the other end in... ? may be work for you please follow me
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| 17. |
A body is kept moving with uniform speed ona circle of radius r by a centripetal force f act on it. How much work done in one rotation? |
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Answer» PLEASE REFER to the ATTACHMENT for the EXPLANATION |
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| 18. |
When you want to spear a fish in a lake, do not spear based on what you see, because you will miss. Why? * |
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Answer» Answer: This is beacuse the real depth of the FISH is DIFFERNT from the apparent image (what we see). The LIGHT rays hitting the fish get refracted due to the WATER and we see the fish at a higher depth than it ACTUALLY is. |
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| 19. |
What are the uses of fire |
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Answer» Answer: Fire has been used by humans in RITUALS, in agriculture for clearing LAND, for cooking, generating heat and LIGHT, for signaling, propulsion purposes, smelting, FORGING, INCINERATION of waste, cremation, and as a weapon or mode of destruction... |
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| 20. |
Why are two eyes more helpful for us to see as compared to one? |
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Answer» Answer: Advantage of having two eyes are:- i) For more ACCURACY - Two eyes make you to see the object more clearly and ALSO having high resolution, and HELPS to see the distant objects clearly. ii) For wider view - From only eye, we can see the IMAGE of 150° only but with two eye we can see 180° of image. Explanation: hope it will HELP you......... |
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| 21. |
What type of mirrors are used in headlight torches by doctor? |
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Answer» Answer: Concave MIRRORS are used in search LIGHTS and torches so that we have a more FOCUSED light BEAM which will not diverge out and hence help in searching. It is used for different light RAYS falling on it to a single point. |
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| 22. |
A body is moving in a circular path of radius r . W hat is displacement after complete a one revolution . |
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Answer» No DISPLACEMENT would be created. Net displacement = 0 because its final and INITIAL POSITION is the same point. |
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| 23. |
4. A Myopia person prefers to remove his spectacles while looking at the sky? |
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Answer» Answer: long SITE is myopia . a persin with myopia the IMAGE falls on retina |
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| 24. |
CRD - 7A body is projected vertically upwardswith a velocity 20m/s. The maximumheight reached by the body. Take g =10m/s21) 10m 2) 20m 3) 30m 4) 40m |
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Answer» Answer: 10m Explanation: the FORMULA for MAXIMUM HEIGHT is u2/2g 10m |
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| 25. |
What is dimension of specific resistance |
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Answer» mark as BRAIN list thanks |
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| 27. |
Observing appearance and colour of some materials: |
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Answer» APPEARANCE= fan |
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| 28. |
Prove that angle of incidence is equal to angle of emergence |
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Answer» Answer: The light ray is refracted out of the GLASS slab at the surface CD ALONG the path GH. The angle of incidence at this surface is ∠r2. The light ray EMERGES out of the slab forming ∠e as angle of emergence. Hence, angle of incidence EQUALS angle of emergence |
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| 29. |
Mirage take place when light rays travel from -------- medium |
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Answer» Answer: Refraction in a Non-Uniform Medium A MIRAGE is an OPTICAL phenomenon that creates the illusion of WATER and results from the refraction of light through a non-uniform medium. Mirages are most commonly observed on SUNNY days when driving down a roadway. |
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| 30. |
Explain concept of negative temperature in connection with the operation of laser |
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Answer» For laser ACTION, there should be more number of atoms in higher energy state. Artificially creating more number of atoms in a higher energy states than the LOWER energy state is called population inversion. ... Therefore, population inversion is known as state of NEGATIVE temperature. |
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| 31. |
Force of attraction between two charges at a distance 'd' is found to be 'F'.What will be the new distance of separation if the force becomes twice of 'F'? |
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Answer» Hey dude your answer is The force between the two charges is DIRECTLY proportional to the product of the charges and inversely proportional to the square of the DISTANCE between them. Hence, if distance between charges is HALVED (charges REMAINING kept constant), the force between the two charges is quadrupled. Hope it's help Mark as brainliest ❤️ |
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| 32. |
What will be the distance between2 point charges of 1 uc so that the electric force be comes 10N |
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Answer» gufwuxgwixgwixhwihxi2xhiwdh1hd2iehdi2egxpue1gxue1gxpuexpugexihpicheixheigciepifeh |
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| 33. |
Can current pass through water |
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Answer» Answer: Electric current can PASS through impure water as it CONTAINS salts while it cannot pass through PURE water because it doesn't contain any salt PLEASE mark me as brainliest |
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| 34. |
No object can start moving in uniform motion because before motion an object was in rest and its velocity was 0. So my question is proof myself wrong. |
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Answer» here is your answer Explanation: true,because when OBJECT is at rest it's VELOCITY is o hence when it start to move the MOVEMENT of the object will be slow and when it move more further the speed well increase so your statement is true hope this helped you MARK me as brainlist |
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| 35. |
A concave and a convex lens have same focallength of 20 cm and are put in contact. the combination is used to view an object of 5 cm length and kept at 20 cm from the lens combination as compared to the object the image will be |
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Answer» the COMBINATION will act as a plane LENSE so image will same DISTANCE from the pole as object |
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| 36. |
Equal amount of water are kept in acap and in a dish . Which will evaporate faster |
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| 37. |
Dobereiner:triad::newland: ? |
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Answer» law of octaves Explanation: the CHEMICAL PROPERTIES of the first element match with those of the EIGHT element. |
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| 38. |
Describe the challenges to personal identity during adolescence. |
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Answer» Hey dude your ANSWER is The challenges to personal IDENTIFY are as follows 1.A distorted or unrealistic perception of oneself. 2.Lack of congruent behaviors and values in DIFFERENT settings. 4.Poor ACADEMIC performance or failure. 5.Promiscuous behavior. 6.Low self-esteem. Hope it's help Mark as brainliest ❤️ |
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| 39. |
Why is icse paper not checked twice ?? |
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Answer» Because, they have CONFIDENCE |
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| 40. |
State the bernoulli theorm?? |
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| 41. |
What is the ratio between rms speed and most probable speed of gases at given temperature? |
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| 43. |
Two point charge of 1 uc and 100 ucseparated by a distance of 1 m. find the electric force between them? |
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Answer» Explanation: FE = k(q1)(q2)/r² = 9×10^9 × 1×10^-6 × 100×10^-6 / 1² = 9 × 10³ × 10^-4 / 1 = 9 × 10^-1 = 9/10 = 0.9 N |
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| 44. |
Cases of doppler effect class 11 ncert can anyone explain it in written? |
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Answer» Answer: Case 1: MOVING source, STATIONARY observer (ESCMP)Let us consider a source of sound WAVES with a constant frequency and amplitude. ... The sound source is the police car in the middle and is stationary. For the DOPPLER effect to take place (MANIFEST), the source must be moving relative to the observer.HOPE IT WILL HELP YOU |
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| 45. |
Q..What is antherozoid? |
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Answer» Explanation: Antherozoid is the MALE GAMETE and is a motile, SPERMATOZOID, SPERM."antherozoid (spermatozoid) The male gamete produced in the (antheridia of fungi, algae, bryophytes, pteridophytes, and some gymnosperms. BROTHER PLEASE MARK IT AS BRAINLIEST PLEASE |
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| 46. |
(0)In the Wilfley table method, the particles of gangue areseparated byseparation method.(A) Magnetic(B)Froth floatation(C)Hydraulic(D)Gravitational |
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Answer» D) Gravitational Explanation: |
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| 47. |
A body of mass 4kg moving with velocity of 2.5m/s collides with a stationary body of mass0.2kg. if the two bodies stick together after collision. Calculate their common velocity after impact |
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Answer» Explanation: Taking the 2 bodies as an isolated system, Law of conservation of momentum TELLS us that the total momentum will remain constant. According to the law, m1u1 + m2u2 = m1v1 + m2v2 But in this case, the bodies stick after collision. Since they are sticking, Their total mass after sticking = 4 + 0.2 = 4.2 kg Now, m1u1 + m2u2 = m3v3 => 4 x 2.5 + 0.2 x 0 = 4.2 x V3 => v3 = 10 / 4.2 => velocity after sticking = 2.38 m/s APPROX. |
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| 48. |
How can we get different magnifications in refracting telescope |
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| 49. |
Name the typea of energy passed by a moving object its SI unit |
Answer» KINETIC ENERGYIT'S SI UNIT IS JOULE |
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| 50. |
Identify which groups can have a positive influence on your identity. |
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Answer» Answer: Most groups that we belong to provide US with a POSITIVE social identity—the part of the self-concept that results from our membership in social groups. The more we feel that our identities are tied to the our group memberships, the LESS likely we are to LEAVE the groups we belong to. Explanation: i HOPE it helps. |
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