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 motion of a particle executing simple harmonic motion is described by the displacement function |
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Answer» The motion of a particle executing simple harmonic motion is DESCRIBED by the displacement function, X(t)=Acos(ωt+ϕ). ... If INSTEAD of the cosine function we CHOOSE the sine function to describe the SHM:x=Bsin(ωt+α), what are the amplitude and initial PHASE of the particle with the above initial conditions. |
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| 2. |
2. A massless uniform rod is subjected to force F atits free end as shown in figure. The ratio of tensilestress at plane P, to stress at P, is(1) 1:2(3) 1:4(2) 12:1(4) 3:2 |
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Answer» I THINK OPTION 4!!!!!!!!!!!!!!!EXPLANATION:option 4 |
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| 3. |
a car travels non stop a to stop B with a speed of 30 km per hour and returns back to a with a speed of 50 km find the displacement of a car distance travelled by a average speed of a car |
| Answer» 0 displacementExplanation:as the CAR RETURNED where it STARTED | |
| 4. |
Which loss contribute more in atransformer? |
| Answer» ELECTRICAL energyhope it will HELP you | |
| 5. |
Is it safe for electrician to carry on electrical repairs outdoor during heavy rain Explain |
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Answer» no because RAIN WATER contains DISSOLVE salts which can easily CONDUCT electricity |
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| 6. |
What is frictional electricity? Give an example |
| Answer» NAL electricity is ANOTHER name for triboelectricity-electricity generated by FRICTION. it is most commonly ASSOCIATED with static electricity. charge separation often occurs true rolling and sliding CONTACT or collision usually between different materials | |
| 7. |
How can you find the C.G of an irregular body |
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| 8. |
if there is an attractive force between all objects why we do not feel ourselves gravitating toward marine buildings in our vicinity |
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Answer» because the ATTRACTION of those objects are more towards the EARTH Explanation:Because the attraction of those objects are more towards the earth that's why they we are not ABLE to SEE there attraction power. |
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| 9. |
What is the other name for potential difference? |
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Answer» .VOLTAGE is the other NAME for POTENTIAL DIFFERENCE |
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| 10. |
Water flows at the rate of 4 liter per second through an orifice at the bottom of lake which contains water 720 cmdeep. Find the rate of escape of water if additional perssureof 16 kg/cm² is applied at the surface of water. |
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Answer» Given : h = 720 CMV = √ ( 2 G h ) V = √ ( 2 × 980 × 720 ) V = 4 litres / secAdditional pressure = 16 kg / cm² = 16000 g / cm²Now : 16000 g / cm² = ( 16000 × 980 ) / ( 980 ) cm of water= > 16000 cm of water .Pressure HEAD = h₁ = 16000 + 720 = 16720 cmNew VELOCITY : v₁ = √ ( 2 g h₁ ) v₁ = √ ( 2 × 980 × 16720 ) V = a v₁ and V₁ = a v₁= > V₁ = V ( v₁ / v ) V₁ = √ ( 16720 / 720 ) V₁ = √ ( 1672 / 72 ) litres / secV₁ = 19.28 litres / secTherefore , rate of escape of water is 19.28 litres / SEC |
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| 11. |
Consider an EV with the following details. Total mass = 1200 kg, front area = 2 m2, aerodynamic drag coefficient = 0.25 and tire rolling friction coefficient = 0.02, air density = 1.25 kg/m3, acceleration due to gravity = 10 m/s2. Equivalent mass for rotational mass can be taken as 6% of total mass. The wheel is connected to a three phase induction motor with a gear. Gear efficiency is 0.9. Induction motor is operating in constant torque region. The vehicle starts from rest and linearly reaches velocity of 80 km/hr in 10 seconds. |
| Answer» PHYSICS is ABSOLUTELY BORING BRO | |
| 12. |
An electric bulb rated 220 V, 100 W is connected in series with another bulb rated 220 V.60 W. If the voltage across the combination is 220 V, the power consumed by the 100 W bulb will beabouta) 25 Wb) 14 Wc) 60 Wd) 100 We) 80 W |
| Answer» 25 WI HOPE it HELPS you............. | |
| 13. |
Water flow along a horizontal pipe of which the cross- section is not uniform. The pressure is 30mm of Hg wherethe velocity is 0.02 m/s. Find the pressure at a point wherethe velocity is 1.2 m/s. |
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Answer» Given : P₁ = 30 MM of Hg= > 3 cm of Hg = 3 × 13.6 × 980ρ₁ = 13.6 G / ccV₁ = 0.20 m / secWe are asked to find P₂ : From Bernoulli's THEOREM we know : ρ₁ + 1 / 2 ρ V₁² = ρ₂ + 1 / 2 ρ V₂²= > On solving further we get : ρ₂ = 3298 dyne / cm²= > 32984 / ( 13.6 × 980 ) ρ₂ = 2.475 cm of HgTherefore , PRESSURE at a point where velocity 1.2 m / sec is 2.475 cm of Hg |
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| 14. |
a car travelled 81km.1/3rd of the first part the car moves with velocity 9km/he and next 1/3rd moves with velocity 18km/he and the remaining 1/3rd moves with velocity 21km/he.calculate the average velocity throughout the distance |
| Answer» OPTION to do XD........ | |
| 15. |
Explain Maxwell's distribution of velocities |
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Answer» The Maxwell-Boltzmann equation, which forms the basis of the kinetic theory of GASES, defines the DISTRIBUTION of SPEEDS for a gas at a CERTAIN temperature. From this distribution function, the most probable speed, the AVERAGE speed, and the root-mean-square speed can be derived. |
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| 16. |
What is average speed |
| Answer» HEY!Distance is a scalar quantity which GENERALLY implies how much GROUND has been covered by the object. On the other hand, DISPLACEMENT is a vector quantity, and it is the shortest POSSIBLE distance between the start and end point. | |
| 17. |
Describe an activity to prove the law of conservation of mass with a neat diagram. |
| Answer» BHAI DIAGRAM bannana haiExplanation: | |
| 18. |
What is insulators? |
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Answer» a material or device USED to prevent HEAT, ELECTRICITY or sound from escaping from something |
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| 19. |
An intensity of 1.0 X 10-1 W/m2 can cause damage to the ears. If the power of sound from a rock band’s amplifier is 85W, how far are you standing from the speaker if you are damaging your ears? |
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Answer» If the power of sound from a ROCK band's AMPLIFIER is 85W, how FAR are you STANDING from the speaker if you are damaging ...Image |
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| 20. |
How much power does a sound source generate if the intensity is 2.4 X 10-6 W/m2 at a distance of 2.3m? |
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Answer» ntensity Distance mTo FIND:How MUCH POWER does a sound source generate.From the EQUATION of intensity in TERMS of power, Where power WTherefore, the power generated by source is W |
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| 21. |
What is the current though 15 ohm resistor and voltage across 5 ohm resistor how would i calculate this process? |
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| 22. |
Solve the question completely.... |
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Answer» alpha *beta*t /(alpha+betaExplanation:we know that the car will be moving with is MAXIMUM speed at the end of the time when it was moving with constant acceleration (say @)..let it accelerate for t1 time ..let it accelerate for t1 time ..so,it will DECELERATE in (t-t1) time...now,v after time t1(v max)[email PROTECTED]=>v [email protected]now,it decelerate for (t-t1) time with CONST. retardation (beta)...=>[email protected] - (beta)*(t-t1)=>t1=beta*t/(alpha +beta)so, maximum velocity=alpha *beta*t /(alpha+beta) |
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| 23. |
A bob of mass m is suspended by a light string of length L. It is imparted a horizontal velocity vo at the lowest point. IT COMPLETES A SEMI CIRCULAR TRAJECTORY IN VERTICAL PLANE..... REFER TO ATTACHMENT. |
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Answer» re two external forces on the bob: Gravity and teñsion.The teñsion does no work as DISPLACEMENT is always PERPENDICULAR to stŕing.Total mechànical energy of the system is consèrved Energy = EGravity = mgTēnsion = TTaking potențial energy of the system to be at zēro at loweśt point A, THENAT A, From Newton's second law,TA(tenšion at A) - mgAt highest point C, the string slaćks as tension at C becomes zero.C,Let Vc be velocity at C THENFROM Newtons second law, from iv we get From iiiUsing I,orAT B, orThusThe ratio of KINETIC energy at B and C is━━━━━━━━━━Now checking the options we get |
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| 24. |
A system uses 2,380 J of energy to do work as 12,900 J of heat are added to the system. The change in internal energy of the system is ____ J. |
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| 25. |
A body starts with an initial velocity of 10m/s and is moving along a straight line with constant acceleration. When the velocity of the particle is 50m/s the acceleration is reversed in direction. The velocity of the particle when it again reaches the staring point is: |
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Answer» The VELOCITY of the particle is 70 m/s.Explanation:Given that,Initial velocity u = 10 m/sFinal velocity V = 50 m/sWhen the BODY acceleratedUsing equation of motion....(I)Now,The acceleration is reversedFinal velocity = 0Initial velocity = 50 m/sUsing equation of motion again.....(II)The body starts moving in OPPOSITE direction from that point. after coming to the initial point.The total distance s'' = s+s'Let the velocity of the body is v'Using equation of motion again,Hence, The velocity of the particle is 70 m/s. |
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| 26. |
A car travels straight for 20 miles on a road that is 30° north of east. What is the east component of the car’s displacement to the nearest tenth of a mile? |
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Answer» les.So BASICALLY when u draw u realise u have the hypotenuse as 20 and an ANGLE of 30 DEGREES. to get the horizontal component u simply TAKE cos30 =x/20so x = 20*cos30 which is 17.3 miles.hope this helps |
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| 27. |
What are the equations of motion??? |
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Answer» body is projected VERTICALLY UPWARDS...it's velocity decreases since it's motion is opposite to direction of gravity.The equations of motion are the equation for the DISTANCE covered in nth second is ━━━━━━━━━━━━━━━━Maximum height ish=TIME of ascent and time of descent IST= |
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| 28. |
What is critical angle?????????? |
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Answer» hithe value of I and value of r BECOME 90° this is CALLED as CRITICAL anglel hope it's HELPING to YOUTHANK you ❤❤ |
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| 29. |
A stone falls from rest from the top of a high tower.Ignore air resistance and take g=10 m/s^2 find its velocity after 2s |
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Answer» IT WILL HELPS YOU. |
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| 30. |
What are types of physical quantities ???? Need detailed answer 50 points !!! |
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Answer» re the quantities which are independent of other quantities. EX- Mass, length These are the quantities which are derived from fundamental quantities.━━━━━━━━━━━━━━━━━━━━★☆°Dimensional CONSTANT (Ex Gravitational constant)These quantities have constant values but they posses DIMENSIONS.★☆°Dimensional variables( ex-Volume)These quantities have VARIABLE values★☆°Dimensionless constant( ex-1,2,3...)These quantities have constant values but they LACK Dimension★☆°Dimensionless variables.(ex-Angles)They are variables and don't have dimensions |
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| 31. |
Draw a force diagram of the pillow once it has hit terminal velocity. |
| Answer» TERMINAL velocity MEANS ACCELERATION becomes ZERO.Therefore FORCE becomes zero. | |
| 32. |
Please help me solving ib this question |
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Answer» tion:R1>R2R2 has more current and LESS VOLTAGE but R1 has more voltage and less current.Therefore,by ohms law,R =V/ISo, R1 has more RESISTANCE than R2.Hope it helps you. |
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| 33. |
What is the basic difference between stress and pressure? |
| Answer» U get LOW marks in EXAM it is CALLED STRESS and When your parents force you to study is called pressure... | |
| 34. |
What are Units? Detailed answer will be marked as brainlist |
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Answer» re essential in understanding a result. They’re also very helpful in determining whether a calculation is correct; and they can also be used to give back-of-the-envelope CALCULATIONS. Another definition of unit is an INDIVIDUAL thing or person regarded as single and complete but is also part of a whole or group. We also use the word unit while referring to the unit price of an ITEM. It means the cost per item, per LITER or per kilogram.WHAT ARE UNITS FOR?Units accomplish at least three things.1.They provide the context of the measured quantity.2.They provide the scale of the measured quantity.3.They establish a common framework amongst scientists by which physical RESULTS are expressed. |
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| 35. |
Pliz guys I want answer fast and correct |
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Answer» length = 7.5 cmExplanation:let ' Ri ' be the resistance of iron wire ,' Rs ' be the resistance of silver WIREAND ' A ' be the area of both the wires.( they have equal area because they have equal thickness )Given, Ri = Rs _________________ (i)SINCE the length is given as 12cm = 0.12mRi = rho × length / area = 10 × 10^-8 × 0.12 / ARi = 1.2 × 10^-8 / A _________________ (ii)let length of silver wire be ' l ' m .Rs = rho × length / areaRs = 16 × 10^ -8 × l / A _______________ (iii)from (i),(ii) and (iii) ,1.2 × 10^-8 / A = 16 × 10^-8 × l / A10^-8 and A can be cancelled on both sides,=> 1.2 = 16l=> l = 1.2 / 16 = 0.075 m = 7.5 cmHope this will HELP you.If so please mark me brainliest. |
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| 36. |
A falling head permeability test was performed on a sand sample and the following data wererecorded:Cross-sectional area of permeameter= 100 cm2; length of the soil sample = 15 cm;area of the stand pipe = 1cm2; time taken forthe head to fall from 150 cm to 50 cm = 8 min,temperature of water was 25°C. Dry mass ofsoil specimen = 2.2 kg and Gs = 2.68.Calculate the coefficient of permeability of thesoil for a void ratio of 0.70 and standardtemperature 20°C. |
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Answer» it's HARD can't UNDERSTAND and ANSWER! |
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| 38. |
What is the resistance of a 100m length of round copper wire with a radius of 0.3mm? ρ copper=1.724x10−8Ωm |
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| 39. |
Define velocity and speed with deffrence |
| Answer» TY is the speed with a DIRECTION, while speed does not have a direction. Speed is a scalar quantity—it is the magnitude of the velocity. Speed is measured in units of distance DIVIDED by time (e.g., MILES per hour, feet per second, meters per second, etc.)....✌✌ | |
| 40. |
An electrician wishes to cut a copper wire (ρ=1.724x10−8Ωm) that has no more than 10Ω of resistance. The wire has a radius of 0.725mm. Approximately what length of wire has a resistance equal to the maximum 10Ω? |
| Answer» PLEASE MARK as BRAINLIST | |
| 41. |
In an arrangement shown in figure all surfaces are smooth and strings and pulkeys are massless. Given m1= 1kg, m2= 2kg, m3=4kg and g=10 , find the acceleration of all the blocks and tension in the two string |
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Answer» Explanation:f net =mxa so here the external force is tension t=malet the string connected in b/w M2 and M3 is t' and the m1 and pulley is TSO the EQUATIONS are m3,40-t'=4a'm2,t'-2t =2am1,t=a by solving we get a+a'=10 =>a=10-a' by further solving we will get ACCELERATION |
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| 42. |
If a horizontal smooth table with a mass on it starts its circular motion, then mass(1) Remains at rest in the same position(2) Moves making an acute angle with the radiusand outward(3) Moves making an obtuse angle with the radiusand outward(4) Moves making an obtuse angle with the radiusand inwardAlso Explain |
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Answer» 3Explanation: |
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| 43. |
A 2.50 L flask was used to collect a 5.659 sample of proste gas C3H8.After the sample was collected, the was pressure was found to be 956 mmHg. What was the tempercare ofthe propane in the flask? |
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Answer» A 2.50 L flask was used to collect a 5.65 g SAMPLE of propane GAS, C3H8. After the sample was COLLECTED, the gas pressure was found to be 741 mmHg. What was the temperature of the propane in the flask.Explanation:P= 741 mmHg(1 atm/760 mmHg)= .975 atmV= 2.50 Ln= 5.65 g C3H8 (1 mol/44 g)= .128 molR= 0.0821T= ?.975(2.50)= .128(0.0821)(T)2.4375 = .0151(T)ANSWER:161.4238 = T |
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| 44. |
Please solve the problem sir please send the answer to me also plz with explaining |
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Answer» e, Here's the ANSWER . . . GivenDensity of wood = 0.8Let V be the volume of wooden block, the volume of liquid displaced= 4V/5If the density of liquid is d thenThe WEIGHT of liquid displaced =4/5 Vdg.The weight of the block = V×0.8×1000×gAs the block floats,Hope it helps! ! ! ! MARK my answer as brainliest! ! ! Regards, ABHINAY. |
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| 45. |
The mass of 1 L of a gas at STP is 1562 g. What will be the mass of 1 L of the gas at 25°C and at a pressure of78 cmHg? |
| Answer» PLEASE MARK as BRAINLIEST ANSWER | |
| 46. |
Electric and magnetic wave oscillating in a straight line is said to be .............a)perpendicular (b)parallel (c)unpolarised (d)Linearly polarised, |
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Answer» .....UNPOLARISED .... |
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| 47. |
Calculate the diameter of a capillary tube in which mercury is depressed by 1.21 cm. Given surface tension for mercuryis 540 x 10N/m. The angle of contact of mercury withglass is 140° and density of mercury is 13.6* 10^3km |
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Answer» ปืนตารางการกระทำผิดกฎหมายเคราExplanation:ฮาร์ดแวร์ตารางเวลาการกระทำผิดกฎหมายเคราปืนสื่อสารออนไลน์ออฟไลน์ทุกวันฟรีทุกวันและบูม |
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| 48. |
What would be the radius of the capillary tube so that water will rise to a height of 8 cm in it? |
| Answer» R =1.785*10 p0wer -4mExplanation:h=2T/rpgr=2T/hpgT=surface tension of water=70*10 POWER-3 N/mr=2*70*10 power-3 N/mdivided by 8*10 power -2 *10 power 4 =1.785*10 p0wer -4m | |
| 49. |
Find the depth at which an air bubble of radius 0.7 mm will remain in equilibrium in water given surface tension of water=7* 10-2 N/m.g= 10 m/s-. |
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Answer» tion:The depth of water at which AIR BUBBLE of radius 0.4 MM REMAINS in equilibrium is |
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| 50. |
What is equivalence principle |
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Answer» Hey!In the theory of general RELATIVITY, the equivalence principle is the equivalence of gravitational and inertial mass, and Albert Einstein's observation that the gravitational "force" as experienced locally while standing on a massive BODY (such as the Earth) is the same as the pseudo-force experienced by an OBSERVER in a non-inertial (accelerated) FRAME of reference.hope it will be HELPFUL ✌️ |
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