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 box of iron has volume 20 cubic CM and its mass is 156g density of box is |
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Answer» SURE ......... ...... SORRY got confused with the question don't know the answer |
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| 2. |
Find the range?Angle= 37 degreesInitial velocity= 10m/s Height if the tower from which a particle is projected= 8m |
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Answer» JAVA javix
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| 3. |
A wire is placed along N-S direction. Current 5A is flowing towards south. What is direction of magnetic field.I) 5m above wire. II) 5m below the wireIII) 5m towards North iv)5m towards south |
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Answer» Answer: 1 above ...................... |
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| 4. |
Relation between magnetic moment and angularvelocity is :-(1) Moca(2) Moco2(3) Movo(4) None of these |
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Answer» RELATION between magnetic moment and ANGULAR VELOCITY is (2) Moco 2 |
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| 5. |
a chemical heater is 220v of supply and takes a current of 5a what is the cost of using heater for 50 h when 1 kWh is rs 1.50 ?? |
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Answer» USING P=VI p=220×5=1100 w 2-total ENERGY CONSUMED in 50 hrs E=p×t (1100/1000)×50=50Kwh So COST will be ▶55×1.50 =82.50 |
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| 6. |
Findmoissesdistanceofforce ofattractionbetween then istwo objectby and6x. tob/w two7.4x10 bysx 10 mkg andD |
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| 7. |
A parallel beam of natural light is inci-dent at an angle of 58° on a plane glasssurface. The reflected beam is com-pletely linearly polarized.a) What is the angle of refraction of thetransmitted beam? b) What is the refrac-tive index of the glass?a) 450, 2.5b) 450, 1.6c) 320, 1.6d) 300, 2.5 |
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Answer»
HOPE it helps |
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| 8. |
Find the pressure applied by a cube of side length 5cm and mass 12.5kg on the surface. |
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| 9. |
he initial and final temperatures of a liquid placed on a heater are recorded as (30.6±0.2) °C and (68.3±0.1) °C respectively. Find the rise in temperature. (37.6±0.3) °C (37.7±0.1) °C (37.7±0.3) °C (37.7±0.2) °C |
Answer» It is given that,INITIAL TEMPERATURE= (40.6±0.2)° CFinal temperature= (78.3±0.3)° CNow, rise in temperature=Final temperature-Initial temperature.So,=(78.3±0.3)-(40.6±0.2)On rearranging the terms,=(78.3-40.6)±(0.2+0.3)=(37.7)±(0.5)=(37.7±0.5)° CAnswer=> (37.7±0.5)° C.....hope this hepuh dear.....pls mark as brainliest
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| 10. |
The initial and final temperatures of a liquid placed on a heater are recorded as (30.6±0.2) °C and (68.3±0.1) °C respectively. Find the rise in temperature. |
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Answer» RISE in temperature is final-initial =68.3-30.6=37.7 But ERRORS are ALWAYS added So error would be 0.3 |
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| 11. |
Do the women of saudi arabia has right to vote |
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Answer» yes Explanation: |
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| 12. |
When MgO is dissolved in water, Mg(OH)2 is obtained. A rd litmus paper dipped in this solutionturns blue, this shows that the solution isin nature.(A) Acidic(B) Neutral(C) Alkaline(D) Reactive |
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Answer» answer will be C......................... |
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| 13. |
Four charges are placed at thecorners of a square of side a. ABD are +q and C is -q. find net force on the charge at corner C |
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Answer» Answer: F = KQq/r² hence , magnitude of force depends UPON products of magnitude of charges and distance between them . but here distance between charge particle is fixed so, only depends upon product of magnitude of charge . we KNOW smallest charge = 1.6 × 10-19C of electrons exist in NATURE . so, if we CHOOSE both charge particle " electrons " then force will be minimum. now, F = Ke²/r² = 9× 10^9 × (1.6 × 10^-19)²/(1/100)² = 9 × 2.56 × 10^-29+4 N = 23.04 × 10^-25 N = 2.304 × 10^-24 N 4.6 |
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| 14. |
A force of 6 N acts horizontally on a stationary mass of 2 kg for 4 s. The K.E in joule isA) 12B) 75C) 144D) 48 |
Answer» Given :▪ Initial velocity = zero ▪ Applied force = 6N ▪ Mass of body = 2kg ▪ Time INTERVAL = 4s To Find :▪ KE of body Concept :☞ This question is completely based on the concept of newton's second law of motion. ☞ As per this law, force is defined as the RATE of change in linear MOMENTUM. Mathematically, ✴ F = ΔP/Δt ☞ Momentum is defined as the product of mass and velocity. ✴ P = m × v ☞ Formula of kinetic energy is given by ✴ K = 1/2×mv² Calculation :⚽ Final velocity : → F = ΔP/Δt → F = mΔv/Δt → F = m(v-u)/Δt → 6 = 2(v-0)/4 → v = 24/2 → v = 12m/s ⚽ Kinetic energy : → K = 1/2×mv² → K = 1/2×2×(12)² → K = 144J |
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| 15. |
A mass M moves at a speed V in the x direction it exposes into two pieces that goes off an angle of θ1 and θ2 as shown. What is the magnitude of the momentum of the two pieces |
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Answer» Answer: An elastic collision is an ENCOUNTER between two BODIES in which the total kinetic energy of the two bodies remains the same. In an ideal, perfectly elastic collision, there is no net conversion of kinetic energy into other forms such as HEAT, NOISE, or potential energy. Explanation: please MARK as brainlist answer and follow me and thanz my 5answer please |
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| 16. |
(give reasons(b) A standard system of units is required. |
Answer» ___________________❥We NEED STANDARD unit for measurement to MAKE our judgement more reliable and accurate. For proper dealing, measurement should be same for everybody. Thus there should be uniformity in measurement. For the sake of uniformity we need a COMMON set of units of measurement, which are CALLED standard units. ♛➖$îñ¢háñà |
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| 17. |
All formulas of motion |
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Answer» Explanation: MARK me as brainliest Equations of motion RELATE the displacement of an object with its velocity, ACCELERATION and time. ... Physics Concept. Variable Equation Velocity v=u+at Displacement with positive acceleration s=ut+12at2 Displacement with negative acceleration s=vt−12at2 Displacement knowing initial and FINAL speeds s=12(u+v)t |
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| 18. |
at what temperatura would the resistance of a copper conductor be double its resistance at 0degree celsius. given alpha for cu-3.9×10power -3 |
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Answer» MARK me as brainliy. Explanation: then I will TELL |
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| 19. |
A particle is projected with certain velocity making an angle o with the horizontal. After 0.5 s its velocity vector is v= (7i+2j) m/s. The angle of projection is (g=10m/s2) in degrees is a-30b-60c-45d-37 ans is 45degree how ? |
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| 20. |
A Find the area1 cm 1 cm 1 cm1 cm1 cm1 cm1 cm1 cm1 cm1 cm1 cm1 cm1 cm 1 cm1 cm 1 cm |
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Answer» Answer: 16 cm Explanation: HOPE IT HELPS DEAR!PLZ MARK AS BRAINLIST DEAR FRIEND!!!!!! |
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| 21. |
What is physics.........??? |
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Answer» Answer: The branch of science concerned with the nature and properties of matter and energy. The subject matter of physics includes mechanics, heat, light and other radiation, sound, electricity, magnetism, and the STRUCTURE of atoms. Additionally:Physics is the natural science that STUDIES matter, its motion and behavior through space and time, and the related ENTITIES of energy and force. Physics is one of the most fundamental scientific disciplines, and its main goal is to understand how the universe behaves. Hope you WOULD have enjoyed answerkeep smilinggood morning!!!!!happy wednesday!!!!! |
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| 22. |
From the measurement shown, find the thickness of each coin.біси212studymate |
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| 23. |
Describe the different technologies that aid to combat pandemics?? |
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Answer» Explanation: Following the recent Ebola outbreak, there have been a number of investigations to ensure that we learn the lessons from this EPIDEMIC and use them to prepare for the next. This has included noted philanthropists such as Bill Gates and Paul Allen calling for GOVERNMENTS and NGOS to use the epidemic as a wake-up call, as the next outbreak may be even more widespread. One sector that is likely to provide a significant impact in future outbreaks is technology. With recent innovation in converging technologies such as mobile computing, mobile communications and broadband internet, it has been possible to trial a number of innovative approaches to epidemic response. ALTHOUGH technology has been used to assist in the fight against epidemics in the PAST, the recent Ebola outbreak has led to a step change in the level of focus from the technology sector. |
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| 24. |
39. Find the derivative of y = cos(logx) :-(1) -sin(logy)(2) -xsin(logx)(3)-1/xsin(logy) (4) 1/xsin(logy)Ans. 3 |
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Answer» Answer: 3 Explanation: first we do DIFFERENTIATION of cos(logx) = -sin(logx) then we do differentiation of logx =1/x this WHOLE differentiation is solved USING chain RULE |
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| 25. |
In the local field problem the cavity need not be chosen as spherical, but may be of any shape possessing at least cubic symmetry. We may for example take the cavity as a cube with a face normal parallel to the polarization. In this case the polarization charge density on the upper and lower faces of the cube is uniform and equal to +P, while the other faces do not carry any charge. Show that, for this cavity, E2=4mP/3, just as for the spherical cavity. |
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Answer» GG from SOCIAL SITES IMMEDIATELY by |
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| 26. |
See the above circuit and answer the following question :i) find the equivalent resistance of this circuit .ii) reading of ammeter A1,A2,A3.iii) find the current flowing through 1 ohm and 6 ohm resistance .iv) and find potential difference across 2 ohm resistance . |
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Answer» PLEASE MARK has BRAINLIEST ANSWER (❁´◡`❁)(♥_♥)(❁´◡`❁)(♥_♥)(❁´◡`❁)(♥_♥)(❁´◡`❁)(♥_♥)(❁´◡`❁) |
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| 27. |
5. Class II lovers are designed to have(a) MAVR(b) MAVR(6) MAI(d) MA1Ans. MA >NUMERICALS1A crowbar of length 120 cm has its fulcrom statedat a distance of 20 cm from the load Calculate themechanical advantage of the crowbar Ans.2 A pair of scissors has its blades 15 cm long, whileits handles are 75 cm long. What is its mechanicalAn 0.53. A force or 5 kgf is required to cut a metal sheet. A pairof shears used for cutting the metal sheet has its blades5 cm long, while its handles are 10 cm long. Whateffort is needed to cut the sheet? Ans. 25 kgf4. Fig. 3.16 below shows a lever in use,(a) If a weight Wis placed ut odio of 250 cmfrom the support on the tower arm tonethe red, find wb) If a weight 5 kgf is kopt te balance the rod.find its position(c) To which class of lever does it belongAns.(*) 4 32 kgf (b) at dine 26 mfrom the support on longer am ) 13. A lever of length 9 cm has its ond arm 5 cm longand the effort arm is 9 cm long (a) To which candoes it belong? (b) Draw a diagram of the lever showingthe position of the futurum F and directions of boththe loud L and effort E. (c) What is the mechanicaladvantage and velocity ratio if the efficiency is 100%(d) What will be the mechanical advantage and velocityratio if the efficiency becomes 50%Ans.(a) class II (c) MA = 18. VR =(d) MA = 09. VR = 189. Fig. 3.17 below shows a lever in se 2018advantageFig. 3.16(a) To which class of lever does it belong?(b) If AB Im AF- 0.4 m, find its mechanicaladvantage(c) Calculate the value of E.Ans.(a) Class I (b) 15 (c) 10 kgf$. A man uses a crowbar of length 1.5 m to raise aload of 75 kgf by putting a sharp edge below the barat a distance of 1 m from his hand, (a) Draw adiagram of the arrangement showing the fulcrum (F).load (L) and effort (E) with their directions, (h) Statethe kind of lever. (c) Calculate (i) load arm,(ii) effort arm, (ii) mechanical advantage, and(iv) the effort needed.Ans. (b) class I (c) (i) 0.5 m (in) 1-0 mCili) 2 (iv) 37.5 kgf6. A pair of scissors is used to cut a piece of cloth bykeeping it at a distance of 80 em from its rivet andapplying an effort of 10 kgf by fingers at a distanceof 20 cm from the rivet(a) Find : (i) the mechanical advantage of thescissors, and (1) the load offered by the cloth(b) How does the pair of scissors act as a forcemultiplier or as a speed multiplier ?Ans.(a) (i) 0.25 ( 25 kgf. (b) speed multiplierA 4 m long rod of negligible weight is supported ata point 125 em from its one end and a load of18 kgf is suspended at a point 60 cm from thesupport on the shorter armFig. 3.17(a) To which class of levers does it belongs?(b) Without changing the dimensions of the lever.the load is shifted towards the fulcrum whathappens to the mechanical advantage of thelever?Ans. (a) It belongs to second class lever(b) The mechanical advantage of the lever will increasewhen load is shifted towards the folorum10. Fig. 3.18 below shows a wheel barrow of mass15 kg carrying a load of 30 kgf with its centre ofgravity at A. The points B and C are the centre ofwheel and tip of the handle sach that the horizontaldistance AB = 20 cm and AC = 40 cmС( 20cmFle. 3.18Find : (a) the load arm, (b) the effort arm, tc) themechanical advantage, and (d) the minimum effortrequired to keep the leg just off the groundAns. (a) 20 cm (b) 60 cm, (c) 3 (d) 15 kgf59 |
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Answer» Answer: d Explanation: please MARK me as BRIANLIST and THANKS my all answers please |
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| 28. |
What should be the distance between two proton by which electrostatic force between them equal to the weight of electron. |
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| 29. |
Neuron ofmass in approaching dueretummass 2m Find The ratio of Their wavelengthwith respect to Their Center at Mass of the system |
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Answer» Answer: 1m Explanation: PLEASE MARK me as BRIANLIST and THANKS my all ANSWERS please |
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| 30. |
A ball is thrown vertically upward from ground with a speed of 24 5 ms. After what time intervals, the ball villbe at a height of 294 m from the ground ? |
Answer» Correct QuestionA ball is thrown vertically upward from GROUND with a SPEED of 24.5 m/s. After what TIME intervals, the ball will be at a height of 29.4 m from the ground ? Solution-A ball is thrown vertically upward from ground with a speed of 24.5 m/s. We have to find that at what time intervals, the ball will be at a height of 29.4 m from the ground. First equation of MOTION: V = u + at Second equation of motion: s = ut + 1/2 at² Third equation of motion: v² - u² = 2as From above data we have s = 29.4 m, u = 24.5 m/s and a is -9.8 m/s² (as it is against the motion). So, using the second equation of motion i.e. s = ut + 1/2 at² Substitute the known values in the above formula, → 29.4 = 24.5(t) + 1/2 (-9.8)t² → 29.4 = 24.5t - 4.9t² → 4.9t² - 24.5t + 29.4 = 0 → t² - 5t + 6 = 0 → t² - 3t - 2t + 6 = 0 → t(t - 3) -2(t - 3) = 0 → (t - 2)(t - 3) = 0 → t = 2, 3 sec Therefore, the time taken by the ball is 2 or 3 sec. |
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| 31. |
A particle moving with uniform acceleration travels24 m and 64 m in 1st two successive intervels of4 s. Its initial velocity is1) 1 m/s2) 2 m/s3) 5 m/s4) 10 m/s |
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| 32. |
Why do we need vactor ? |
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Answer»
○●Vectors are useful because they can visually represent position, displacement, velocity and acceleration. ○●When drawing VECTORS, you OFTEN do not have enough space to DRAW them to the scale they are representing, so it is important to denote somewhere what scale theyare being drawn at. ○●To know the direction in which the force is attempting to MOVE the body. ○●Vectors are used in Engineering where of the force is much strong than the structure will sustain,else it will COLLAPSE. |
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| 33. |
how do you prove that the speed of diffusion of ammonia is more than that of the speed of diffusion of hydrochloric acid |
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Answer» Explanation: AMMONIA is more than that of the speed of diffusion of hydrochloric acid. ... 6.we can see that ammonia DIFFUSES faster than hydrochloric acid. |
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| 34. |
Find the resultant vectors of J&k if j= 10i -3j+2k and k = 41+10j-11k |
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Answer» RESULTANT of VECTOR J+K = (10+4)î+(-3+10)j + (2-11)k = 14î + 7j - 9K |
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| 35. |
Two equal masses are raised at constant velocity by ropes that run over pulleys as shown.Mass B is raised twice as fast as mass a .The magnitude of the forces are Fa and Fb.while the power supplied respectively Pa and Pb.which of the following statement is correct |
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| 36. |
How can we smell perfume sitting several meters from the source |
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Answer» Answer: When perfume is released it QUICKLY changes into VAPOUR. The kinetic ENERGY of gas molecules is HIGH & the rate of diffusion is high. Hence we can smell the perfume sitting several metres away. Mark me as brainliest and follow me. |
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| 37. |
Mention the situations where we use diffusion in our day to day life |
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Answer» we INVOLVE the process of diffusion when we INTER mix two particles of DIFFERENT substsnces for example we inter mix sugar particles and WATER to get sugar solution |
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| 38. |
Describe the process of thermal emissions with the help of diagram..... ❤ |
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| 39. |
What is the radius of gyration for a protein which consists of 625 amino acids, and the average length is 0.8 nanometers? 1 |
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| 40. |
What is the radius of gyration for a protein which consists of 625 amino acids, and the average length is 0.8 nanometers? |
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Answer» Answer: RADIUS of GYRATION describes the overall spread of the molecule and is defined as the root mean SQUARE DISTANCE of the collection of atoms from their common centre of gravity. Radius of gyration analysis for a dataset of ~1000 globular proteins from PDB database is performed and the values are plotted against N3/5(N is the no. of Amino Acids). ➡ RG = 0.395*N3/5 + 7.257 Rg = 0.395*N3/5 + 7.257This filter can be employed to evaluate the value of radius of gyration for a given protein and to find out whether the protein follows the above equation or not. ʜᴏᴘᴇ ɪᴛ ʜᴇʟᴘs ʏᴏᴜ. Explanation: þLÈÄ§È MÄRK MÈ Ä§ ßRÄÌñLÌȧ†✌✌✌ |
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| 41. |
I BY MISTAKELY CLICKED ON NO ON PUBG HEALTH RESTRICTION.PLEASE HELP I WANT TO FIX IT. |
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Answer» Explanation: SRY I DON NOT PLAY PUBG........ |
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| 42. |
Deleted syllabus of class 11th CBSE of Physics. |
Answer» Syllabus of Class 11th Physics of the CBSE board.Explanation: In the given question there two more ATTACHMENT file is missing, which can be ATTACHED as follows: During covid19 all the SCHOOL REDUCES its 30% syllabus of all subjects, in which we attached its full syllabus. so, please find the attached file. |
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| 43. |
if a car is taken from a garage, driven for 100km before returning to the garage after 2hours. what is its average speed |
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Answer» Answer: Explanation: |
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| 44. |
Define zero error of a measuring instrument. |
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Answer» Answer: ZERO ERROR is defined as the condition where a measuring instrument registers a reading when there should not be any reading. In case of vernier CALIPERS it occurs when a zero on MAIN scale does not coincide with a zero on vernier scale. pls mark as brainlieest answer Explanation: |
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| 45. |
Find out yhe strange one from incanfenscent lamb flurecent lamb ,cfl ,arc lamb |
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Answer» compact fluorescent LAMP (CFL), also called compact fluorescent light, energy-saving light and compact fluorescent tube, is a fluorescent lamp designed to replace an incandescent light bulb; some types fit into light fixtures designed for incandescent bulbs. The lamps use a tube which is CURVED or folded to fit into the space of an incandescent bulb, and a compact electronic ballast in the base of the lamp. Compared to general-service incandescent lamps giving the same amount of visible light, CFLs use one-fifth to one-third the electric power, and last eight to fifteen times longer. A CFL has a higher purchase price than an incandescent lamp, but can save over five times its purchase price in electricity costs over the lamp's lifetime.[1] Like all fluorescent lamps, CFLs contain toxic mercury[2] which complicates their disposal. In many countries, governments have banned the disposal of CFLs together with regular garbage. These countries have established special collection systems for CFLs and other HAZARDOUS waste. The principle of OPERATION remains the same as in other fluorescent lighting: electrons that are bound to mercury atoms are excited to states where they will radiate ultraviolet light as they return to a lower energy level; this emitted ultraviolet light is converted into visible light as it strikes the fluorescent coating (as well as into heat when absorbed by other materials such as glass). |
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| 46. |
cobsider a metal cubical block whose opposite faces are at different temperatures.on which factor the flow of heat depends? |
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Answer» Answer:it will be on the factor of the type of metal CONDUCTOR it IS of its a good conductor of heat OS weak that will be the factor for mate INFORMATION GO to Abbot |
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| 47. |
Briefly explain the phenomenon in slide 16 with reference to magnetisation |
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Answer» Two spheres each of mass 0.0005 kg are suspended by same point from silk THREAD 0.2m long .equal charges are given to the ball.the the spheres are the. n SEPARATED and MAKES an angle 30 between two threads and point of suspension calculate charge on each ball. |
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| 48. |
Find component of vector a which makes equal angle with X y and z axis |
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Answer» · Vector →A makes equal ANGLES with x-,y-,and z-axis. FIND the value of its components (in terms of MAGNITUDE of →A) Solution : Let the component of →Amakes angles α,β,and γ with x,y,and z-axis,RESPECTIVELY. |
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| 49. |
A wire 80cm vibrates in four nodes, find the speed of the wave in the wire if it vibrates with frequency of 600 Hz.a) 160m/secb) 240m/secc) 320m/secd) 400m/sec |
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| 50. |
: - A body starts moving with a velocity of (Vο = 3 m/s) and moves in a straight-line motion with uniform acceleration. After (t1 = 5 seconds) of time it has a gained the velocity (v = 5.5 m/s). Find the uniform acceleration and the distance travelled in (t2 = 10 seconds)? |
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Answer» Answer: INITIAL velocity (u)= 3m/s final velocity(v)= 5.5m/s acceleration(a) = change in velocity/time = v-u/t = 5.5-3/5 = 2.5/5 = 0.5 uniform acceleration = 0.5m/s∧2 when time (t2) = 10s distance (s) = ut + 1/2at∧2 = 3×10 + 1/2×0.5×10×10 s = 30 + 0.5×50 = 30 + 25 = 55 distance = 55m hope this helps
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