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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. |
A particle moves by 1cm in 1sec in a path of radius 10 can. It's angular speed would be? |
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Answer» Answer: |The particle moves one centimeter per second. The circle has circumference 2*10*Pi = 20 *Pi CENTIMETERS, so the particle covers 1/(20*Pi) of the circumference per second. Since the circumference CORRESPONDS to 2*Pi RADIANS, this makes the angular speed of the particle (2*Pi)/(20*Pi), which is equal to 0.1 radians per second. Hope that helps! mark as BRAINLIEST |
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| 2. |
What is Gravitational Force ? |
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Answer» Answer: Gravity or GRAVITATIONAL force, is a nature PHENOMENON by which all things with mass or energy- including plants, stars,galaxies and even lights - are brought towards ONE another . Please follow me and add me in brainlist answer please please please. |
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| 3. |
if velocity of a paritical at any instant 't' is given by v=at+bt^2, the dimension of b will be- (a)[L] (b) [LT^-1] (c) [LT^-2] (d) [ LT^-3] |
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Answer» ANSWER:d) [ LT^-3] Explanation: PIC is ATTACHED as explanation Follow 4more |
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| 4. |
9. If a brick fall down from top of the building in 4 secthen the height of that building is __ mit.a) 72.2 b) 74.8 c) 78.4 d) 64.8nail |
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Answer» s=ut+1/2at² s=1/2*9.8*4*4=78.4 |
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| 5. |
The position graph (x-t) graph of an object in uniform motion is given below . Calculate the velocity with which the object is moving |
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Answer» Answer: |
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| 6. |
A certain sound wave in air has a speed 340m/s and wavelength 1.7 m for this wave calculate the frequency and period |
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Answer» KEEP going All the best. keep EXPLORING. |
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| 7. |
Why is candal blow up easily where as a bone fire is difficult to blow |
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Answer» Answer: The FORCE of air through our MOUTH is sufficient for the candle to GET blown,But for a bonfire we need a GREATER force than that. Easy.Thank you. |
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| 8. |
Please solve it fast....... |
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Answer» ANSWER:√20 sec Explanation: |
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| 9. |
Two blocks 'A' and 'B' having masses ma and me, respectively,are connected by an arrangement shown in the figure.Calculate the downward acceleration of the block B. Assumethe pulleys to be massless. Under what condition will block Ahave downward acceleration? |
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Answer» acceleration of B is g(ma+me)/2 when mass of a become me mark as BRAINLIEST |
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| 10. |
If electrical energy cost Rs 3 per unit, what is total cost of leaving 4 bulbs rated at 100w each, switched on for 8 hours? |
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Answer» HI my friend the ANSWER is 3× 36 = 108 |
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| 11. |
The power of a lens is +4D, then the focal length is-(a) 20 cm (b) 40 cm (c) 10 cm (d) 25 cm |
Answer» Answerf=1/p=1/4=0.25 metre=25 CM |
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| 12. |
Two toy motorcyclist start a race simultaneously with constant speed from point p to travers a rectangular track pqrs one clockwise and other in anticlockwise sense they simultaneously cross at cube first time after a time interval 5 minute if they continue the race how long after a cross at first time will again simultaneously cross at q |
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| 13. |
A charged particle is projected in a magnetic field B=(3i+4j)*10^-2.The acceleration of the particle is found to be a=(-8/3i+yj)m/s2 . Find the value of y. |
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Answer» Answer: 2 Explanation: So, ACCELERATION will be PERPENDICULAR to magnetic field . So, B.a =0 3*(-8/3) +4y = 0 4y = 8 y = 2 |
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| 14. |
A mass 10kg hanging from a ceiling in a string is pulled sidewise with a force F. The angle made with string is 30. What is magnitude of force? What is tension? |
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| 15. |
Calculate the displacement when 60 degree of a circle is given means 1/6th part of a circle. |
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Answer» ANSWER:R is the DISPLACEMENT that is EQUAL to radius Explanation: |
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| 16. |
A thin prism produces an angular dispersion of 18'. If the refracting angle of prism is 2 and theR.I. of its material for violet light is 1.74. calculate the R.I. of its material for red light. |
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Answer» CHECK the GOOGLE for BEST answers Explanation: it's best |
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| 17. |
How find Areal velocity of a particle that moves along tha path? Give answer |
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Answer» Answer:When a particle moves along a curve, the rate of change of area SWEPT by the particle is known as areal velocity. EVERY particle on the solar system has areal velocity. The Sun, The Earth, all the Planets. The velocity at which the RADIUS vector sweeps out unit area. Explanation: hope this helps u PLZ follow me |
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| 18. |
A projectile is thrown at an angle of 40° with the horizontaland its range is R1, Another projectile is thrown at an angle of 40° with the vertical and its range is R2. Then relations betweenR1 and R2 is |
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Answer» Answer: Explanation: AA projectile is thrown at an angle of 40° with the horizontal and its RANGE is R1, Another projectile is thrown at an angle of 40° with the vertical and its range is R2. Then relations between R1 and R2 is |
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| 19. |
A force F = 10 N acting on a box 1 m along a horizontal surface. The force acts at 30° angle. Determine the work done by force the work done force F. |
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Answer» Explanation: Given :- Force (F) = 10 N The HORIZONTAL force (Fx) = Fcos30° Fx = 10(√3/2) = 5 × 1.73 = 8.65 N Displacement (s) = 1 m ____________________________ To find :- WORK done (W) = ?____________________________ Solution :- We have, Work done (W) = Force × displacement => W = Fx × s => W = 8.65 × 1 => W = 8.65 J _____________________________ The work done is 8.65 J _______________________[ANSWER ] |
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| 20. |
One half of a convex lens is covered with a black paper. Will this produce a complete image of the object? Justify your answer. |
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Answer» yes definitely.it PRODUCES complete image because the beam of light passes through the other HALF is enough..... however it's INTENSITY BECOME half |
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| 21. |
14) 48.5 N1. A force F = 5t is applied on a block of mass10 kg kept on rough horizontal surface (u = 0.5).in rest what is speed of the block at t = 20 s?10 kg= 5tu = 0.5(1) 15 m/s(3) 25 m/s(2) 18 m/s(4) Cannot be calculated |
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Answer» It is 25m/s |
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| 22. |
An object starting from rest travels with in an acceleration 5 m/s^. What is velocity after 3 second |
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Answer» Answer: Explanation: InAn object STARTING from rest travels with in an ACCELERATION 5 m/s^. What is velocity after 3 second |
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| 23. |
5. A car move from rest for 10sec. find the distanocovered if its acceleratgion is 4m/s2?a) 200mit b) 100mit c) 50 mit d) none of these |
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Answer» The solution is very easy. Explanation: Use the equation S = ut + 1/2 at^2 = 0×10 + 1/2 × 4 × 10^2 = 2 × 100 = 200 Therefore the answer is 200 m/s |
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| 24. |
The presence of which cell on the retina helps us to see dim lights |
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Answer» Hello mate .. . . . Presence of Rods in RETINA GIVES us night vision ie help us to SEE in dim light ... . . . CHEERS (✯ᴗ✯) |
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| 25. |
Derive the expression for adiabatic expansion ?.. |
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Answer» Chekout This PICTURE For Answer |
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| 26. |
What is Hess law explain it . |
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Answer» Answer: Hess's Law of CONSTANT Heat Summation (or just Hess's Law) STATES that regardless of the MULTIPLE stages or steps of a reaction, the total enthalpy change for the reaction is the sum of all changes. This law is a manifestation that enthalpy is a state function. Explanation: make me as brainaliest |
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| 27. |
Find the length of a vector + b vector and a vector minus b vector a vector equal to 4 Y - 3 J + K and b vector equals to minus i + J + 4K |
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Answer» b = i + j + 4k a+b = 4i -2j +5k a-b = 3i-4j-3k |
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| 28. |
5. If the velocity of a train which starts from rest is 72 km/h (20 m/s)after 5 minute, find out its acceleration and the distance travelledby the train in this time. |
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Answer» Explanation: 5min=5×60=300s a=change in velocity/time a=20/300 1/15 s=ut +1/2at2 s=1/2×1/15×300×300 s=3000metre.. |
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| 29. |
Errors made during relative density of solid and liquid by Archimedes principle |
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Answer» If its average density is less than that of the surrounding fluid, it will float. This is because the fluid, having a HIGHER density, contains more MASS and hence more weight in the same volume. The buoyant force, which equals the weight of the fluid displaced, is THUS greater than the weight of the object. Explanation: make me as BRAINALIEST answer |
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| 30. |
Convert 500 erg into joule |
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Answer» Answer: 1J = 10^5 ERG
and 1erg = 10^-5 J there 500 erg = 500×10^-5 = 0.00500 J HOPE THIS HELPS YOU Pls mark as BRAINLEST |
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| 31. |
In the problem "up" is taken positiveA ball is thrown vertically upward with an initial velocity 19.6m/s after 5s has a velocity of |
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Answer» Explanation: Max HEIGHT attained by it is Hmax = u^2 = 19.6 × 19.6 ÷ 2 × 9.8 2g Hmax = 19.6m PUTTING the VALUE in 3rd EQ. of motion v^2 - u^2 = 2as v^2 = 19.6 × 19.6 + 2 × 9.8 × 19.6 v^2 = 384.16 + 384.16 v^2 = 768.32 v = 27.71 m/s or 28 m/s I HOPE IT WILL HELP YOU PLEASE MARK IT BRAINLY ♥ |
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| 32. |
Can you give me one example of conversation of mechanical energy to electric energy? |
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Answer» WINDMILL the PERFECT example of CONVERSION of mechanical energy to electrical energy. |
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| 33. |
Write short note on work.plz.... ask mw |
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Answer» Work is the product of force and displacement. In physics, a force is SAID to do work if, when acting, there is a movement of the point of APPLICATION in the direction of the force. SI unit: joule (J) Derivations from other quantities: W = F ⋅ s; W = τ θ Other units: Foot-pound, Erg In SI base units: 1 kg⋅m2⋅s−2 |
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| 34. |
6.What will be ratio of average speed in first twoseconds to the speed in next 4 s?11 23456ben(1) √2:1(2) 3:1(2) 2:1(4) 1:2 |
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Answer» 13:20 |
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| 35. |
4. If IĀ+BI=1Ā 1=1B | then angle between Aand B will be(1) 90°(2) 120°(3) 0°(4) 60° |
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Answer» √ A² + A² + 2A²Cos THETHA = A 2A² + 2A²Cos thetha = A² 2A²Cos thetha = - A² Cos thetha = - 1/2 Thetha = 120 Degrees Ans... |
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| 36. |
Give me a numerical question related to magneto statics? |
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Answer» This set of Electromagnetic THEORY MULTIPLE Choice Questions & Answers ... The magnetostatics highly RELIES on which property ? |
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| 37. |
63. If the velocity of light in water is2.26x10ºms'', then what is the velocity oflight in air? (refractive index of water is1.33) |
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Answer» Explanation: |
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| 38. |
A sphere of mass 20kg and radius 12 m rotates about .The moment of inertia oa the sphere is |
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Answer» Explanation: moment of inertia for the sphere is 2/3Mrsquare APPLY the FORMULA and check whether the ANSWER is correct or else apply the following formulas 2/5mr^2 7/5mr^2 2/3mr^2 5/3mr^2 |
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| 39. |
If a car travels the first one third of its destination with a uniform speed 10 km/h, second one third of its destination with a uniform speed 30 km/h and the remaining part at an uniform speed 5 km/h, what is its average speed? |
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Answer» Answer: 9 KM/ h Explanation: |
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| 40. |
A container has 2.5 litres of water at 20°C. How much heat is requaired to boilthe water? |
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Answer»
. Explanation: . . . . |
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| 41. |
Results of Rutherford scattering |
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Answer» Answer: Conclusion of RUTHERFORD's scattering experiment: Most of the space inside the atom is empty because most of the α-PARTICLES passed through the gold foil without getting deflected. Very few particles were deflected from their path, indicating that the positive charge of the atom occupies very LITTLE space. Explanation: MAKE me as brainaliest answer |
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| 42. |
Why heat is hot . explain briefly. |
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Answer» Answer: Over TIME, there will be a flow of ENERGY from the hotter object to the cooler object. This flow of energy is referred to as HEAT. The heat flow causes the hotter object to cool down and the colder object to WARM up. The flow of heat will continue until they reach the same temperature. |
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| 43. |
What is the method of purification of copper |
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Answer» COPPER is purified by ELECTROLYSIS. In this process copper is transferred from an impure anode to the CATHODE of an electrolytic cell. The insoluble impurities fall to the bottom. The copper produced by this process is 99.99% pure copper. |
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| 44. |
Explain resolution of vector with neat and well labelled diagram |
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Answer»
Parallelogram Method of Vector Resolution The parallelogram method of vector resolution involves using an accurately DRAWN, scaled vector diagram to determine the components of the vector. Briefly put, the method involves drawing the vector to scale in the indicated direction, sketching a parallelogram around the vector such that the vector is the diagonal of the parallelogram, and determining the magnitude of the components (the sides of the parallelogram) using the scale. If one desires to determine the components as directed along the TRADITIONAL x- and y-coordinate axes, then the parallelogram is a rectangle with sides that stretch vertically and horizontally. A step-by-step procedure for using the parallelogram method of vector resolution is: Select a scale and accurately draw the vector to scale in the indicated direction. Sketch a parallelogram around the vector: beginning at the tail of the vector, sketch vertical and horizontal lines; then sketch horizontal and vertical lines at the head of the vector; the SKETCHED lines will meet to form a rectangle (a special case of a parallelogram). Draw the components of the vector. The components are the sides of the parallelogram. The tail of the components start at the tail of the vector and stretches along the axes to the nearest corner of the parallelogram. Be sure to place ARROWHEADS on these components to indicate their direction (up, down, left, right). Meaningfully label the components of the vectors with symbols to indicate which component represents which side. A northward force component might be labeled Fnorth. A rightward velocity component might be labeled vx; etc. Measure the length of the sides of the parallelogram and use the scale to determine the magnitude of the components in real units. Label the magnitude on the diagram. hope it would help u mark me brainliest one |
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| 45. |
Where do we use the process of recycling? how is it useful? give example. |
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Answer» Answer: Recycling can prevent the waste of potentially useful materials and REDUCE the consumption of fresh raw materials, thereby reducing: ENERGY usage, air pollution (from incineration), and water pollution (from LANDFILLING). Plastic BOTTLES which harmful for our environment, here we uses recycling PROCESS. |
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| 46. |
Why do diamond sparkle. |
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Answer» The sparkling isn't just the high refractive INDEX - the shape matters too. DIAMONDS are cut so that a LIGHT ray falling on the diamond is reflected multiple times inside the diamond and therefore sends light out in all DIRECTIONS. Actually, diamonds don't shine, they reflect. PLEASE MARK AS BRAINLIST AND FOLLOW ME. |
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| 47. |
P, Q, R are three vectors obeys the P+Q =R and P^2 +Q^2 = R ^2, find out the angle between P and Q |
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Answer» Answer: Explanation: |
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| 48. |
Why we are not able to see the blowing air. |
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Answer» Because the AIR particles are very SMALL and can’t be seen with NAKED EYES |
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| 50. |
Define vector product of two vector and write its characteristics |
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Answer» Answer: Characteristics of cross product are: (i) Cross product of two VECTORS is ANTI commutative. (II) Cross product of two vectors is EQUAL to the area of parallelogram FORMED by two vectors. (iii) Area of triangle formed by two vectors and their resultant is equal to half the magnitude of cross product. PLEASE MARK AS BRAINLIST AND FOLLOW ME. |
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