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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 needle working on sewing machine which type of motion |
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| 3. |
A ball of 2gram is move in a half sphere of 20cm with the mg then find work done by mg? |
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Answer» I HOPE it helps❤ thanks for giving me a chance to help u |
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| 4. |
How to calculate valtage when source are connected in series |
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Answer» Answer: ADD the resistance of RESISTORS to get the value of R and by using CURRENT ,, U can get the voltage. THNKS! |
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| 7. |
A car moving in traffic which type of motion is this |
Answer» ❕❗Translatory motion❕❗#HOPE IT HELPS YOU ❤♥♠♣#GO_π_FOLLOW_ME⏬⏫⏪⏩⤵⤴ |
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| 8. |
.. What is the value ofcircuit?Fig. 4.64is the following network if Icurrent flows through the(Ans. 450Fig. 4.65 |
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Answer» Answer: 15 L of water at STP has maximum number of molecules. It is because at same temperatture and pressure, LIQUID water has maximum density than equal volume of ICE and water vapour. THEREFORE, 15 L of water will have maximum molecules than 15 L of H2O gas and 15 L of Ice. |
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| 9. |
What are the factors on which the pressure of a liquid depends please help |
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Answer» Answer: The depth of BODY. - The depth of the body at which the PRESSURE of liquid is acting on the body. Deeper the body , HIGHER would be the extent of pressure of liquid acting on the body. The density of liquid: the pressure of liquid acting on any particular body hugely depend upon the density of liquid( the physical QUANTITY depending on mass - volume ratio) . higher the density, higher would be the pressure of liquid acting on liquid contact with that liquid. Explanation: Hello mate Mark me as brainliest ...........!!!!!!! Hope u like it .....!!!✌✌✌✌ Follow me .....!!!!!!!!!!!!✌✌ |
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| 10. |
7.The position x of a particle moving in a straight line,varies with time tas x = 1/t+3. The accelerationof particle is proportional to |
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Answer» Explanation: x = 1/t+3 x = (t+3)^(-1) v= dx/dt = (-1)(t+3)^(-2) a = (-1)*(-2)*(t+3)^(-3)
So, a = 2/(t+3)^3 which means that a is proportional to INVERSE of (t+3)^3 or t^3 |
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| 11. |
the resultant of which of the following sets can not be zero 1.10,20 and 40 2.10,10 and 20 3. 10 , 20 and 20 4. 10, 10 and 10 |
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Answer» OPTION 1 . i.e. 10,20,40 can NEVER priduce 0 resultant See attachement and SOLVE any of your PROBLEM regarding these types of questions |
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| 12. |
What is the angle between i +j+k and i |
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Answer» please FOLLOW me |
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| 13. |
What is the formula for change in momentum |
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| 14. |
Define plain angle solid angle |
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Answer» Answer: SOLID ANGLE is the angle subtended by a plane area, at the given point ASSUMING that point to be the center of the great sphere of which the plane be a section. Whereas a plane angle is the angle subtended by any LINE at a given point for whole of its length. |
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| 15. |
How to hold a hair trimmer properly? |
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Answer» Explanation: |
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| 16. |
The focal length of a concave lens is 30cm. At what distance should the object be placed from the lens so that it forms an image at 20cm from the lens |
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| 18. |
A simple pendulum has a time period of 1.0 sec at the earth's surface. It is taken to aheight R/2 above the earth's surface, where Re is the radius of the earth. The timeperiod is(A)1.5 sec(B) 2.5 sec(C)3 25 sec(D) none of these |
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| 19. |
2. Airplanes A and B are flying with constant velocity in thesame vertical plane at angles 30° and 60° with respect to thehorizontal respectively as shown in the figure. The speed ofA is 100V3 ms. At time t = 0 s, an observer in A finds Bat a distance of 500 m. This observer sees B moving with aconstant velocity perpendicular to the line of motion of A.If at t= to, A just escapes being hit by B, t, in seconds is |
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Answer» I’m |
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| 20. |
List the main factors that determine the shape of cell |
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Answer» FACTORS that determine the shape of cells are :- |
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| 21. |
3.In which of the following does the reaction goalmost to completion?(1) K = 103 (2) K = 10²(3) K = 10-2 (4) K. = 10-3A mole of DCdicconintent zonkinlitre |
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Answer» Answer:
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| 22. |
A particle starts from the origin gosala x-axis to the point 20 and then returns along the same line the point - 20 the distance and displacement of the particle during water park |
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Answer» DISTANCE = ( 20 +20 + 20 )m = 60m displacement = 20 - 20 -20 = -20M |
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| 23. |
What are acid take these points these will help you |
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Answer» Answer: hey !!a SUBSTANCE with particular chemical properties including TURNING LITMUS RED, neutralizing alkalis, and dissolving some metals; TYPICALLY, a corrosive or sour-tasting liquid of this kind. miss u sooo much T _ T GDHE !! MISS U ☺❤❤ |
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| 24. |
Give me some names of physics model for science exhibition |
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Answer» Solar System would be the best for your physics MODEL of science EXHIBITION. |
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| 25. |
OneWritetheequation andqualitativeofOhm's law? |
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Answer» V PROPORTIONAL to I . v=constant I. V = IR |
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| 26. |
What is seeddefine electroplating how can Steel spoon be plain made with silver explain with the help of a diagram |
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Answer» here is your answer::--- HOPE it helps.please mark me as brainliest.plzzzzzzz . |
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| 27. |
the two blocks of mass 2kg and 5kg are connected by an ideal string passing over a Pulley. the block of mass 2 kg is free to slide on a free slide on a surface inclined at an angle of 30°which the horizontal whereas 5 kg hangs,freely find the horizontal acerelation of the system and T in the strings. (u = 0.3) |
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| 29. |
Methods in measuring lenghts? |
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Answer» Answer: Length measurement. Length measurement is implemented in practice in many ways. The most COMMONLY used approaches are the transit-time methods and the interferometer methods based UPON the speed of LIGHT. For objects such as crystals and diffraction GRATINGS, diffraction is used with X-rays and electron beams. |
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| 30. |
The radius of the path of an electron moving at a speedof 3 x 10power of 7 m/s perpendicular to a magnetic field 5 x 10power of 4Tis nearly(a) 15 cm(b) 45 cm(c) 27 cm(d) 34 cm |
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Answer» Answer: the RADIUS of the path of an electron MOVING at a speed is NEARLY 27CM. |
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| 31. |
A particle moves along x-axis under the action of a position dependenthong X-axis under the action of a position dependent force F = (5x – 2x)N.Work done by forces on the particle when it moves from origin to x = 3 m is |
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| 32. |
A man of 600 N weight climbs up a hill ofheight 400 m. What is the work done byhim? |
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Answer» WORK is EQUAL to force×displacement work=600N×0.4kmwork= 240j |
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| 33. |
]Assume that the earth goes round the sun in a circular orbit with a constant speed of 30 km/s. Thena) The average velocity of the earth from 1st Jan 1990 to 306 June, 1990 is zero[b) The average speed from 1st Jan, 90 to 31st Dec, 90 is zero) The instantaneous speed at June 296 is 30 kms!d) all of the aboveAt |
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Answer» the INSTANTANEOUS speed at june 296 is 30 KMS |
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| 34. |
an object of height 2 cm is held at a distance of 40cm in front of a concave lens of power -5d find the size of the image |
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Answer» we PUT lens FORMULA and get v=-5.71... then m=hi/HO m=-5.71/40 then m=hi/ho=v/u hi/2=-5.71/40 40hi=-11.42 hi= -0.2855 size of images is-0.2855 hi is LESS than ho |
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| 35. |
What is meant by amplitude |
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Answer» PHYSICS the maximum EXTENT of a vibration or oscillation, measured from the position of equilibrium. "the amplitude of alpha rhythms" 2. ASTRONOMY the angular distance of a celestial OBJECT from the true EAST or WEST point of the horizon at rising or setting. |
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| 36. |
The power of convex lens in air is +6D. The power of lens in water |
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| 37. |
estimate the average force exerted by a shot-putter on a 7.0kg shot if the shot is moved through a distance if 2.8m and is released with a speed of 13 m/s |
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Answer» Answer: BEST answer v² = u² + 2as (13m/s)² = 0 + 2 * a * 3M → a = 28.2 m/s² F = ma = 7kg * 28.2m/s² = 197 N |
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| 38. |
to a person moving eastward with a velocity of 4.8 km per hour rain appears to fall vertically downward with a speed of 6.4 km per hour find the speed and direction of the rain |
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Answer» Answer: speed and direction of rain is 8 km/hr SOUTHWEST Explanation: Velocity of PERSON, Vp = 4.8 km/hr east = 4.8 in positive x axis Velocity of rain to be appeared to the person, Vrp = 6.4 km/hr ( in negative y axis) Vrp = VR - Vp Vr = √( Vrp^2 + Vp^2) = √64 = 8 km/hr southwest
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| 39. |
four point charges are placed at the corner of a square ABCD of side 1m .if o is the point of intersection of the diagonal of the square and E is the mid point of side BC .find magnitude and direction of electric field at o |
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| 40. |
4 characteristics of scalar product . |
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Answer» Answer: 1) Scalar PRODUCT is commutative. 2) Scalar product of TWO mutually PERPENDICULAR vectors is zero. 3)Scalar product of two PARALLEL vectors is EQUAL to the product of their magnitudes. 4) Self product of a vector is equal to square of its magnitude. Hope this will help✌ |
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| 41. |
a hiker stand on a chart off a cliff 1.9m above the ground and throws a stone horizontally with an initial speed of 20 metre per second |
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| 42. |
What is coefficient in heat ? |
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Answer» Q we DENOTE HEAT with Q .but I think there is no coefficient of heat. |
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| 43. |
Article of mass m has half the K.E of another particle of mass m/2. if the speed of the heavier parincreased by 2 m/s, its new K.E equals the original K.E of the lighter particle then |
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Answer» v=4/3,v=4 |
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| 44. |
A block of mass 250 grams slides down an incline of inclination 37° with a uniform speed as a block slides through one then force of gravity is |
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Answer» Answer: 2000 Explanation: FORMULA is mgsin37degrees |
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| 46. |
Pinky Public SchoolName:manoj kumar.rGrade: VIII, Sec:cPhysical Science - Worksheet-2Lesson 12. Friction1. Why liquids and gases are called as fluid?2. Fill in the blanks: A car with worn out treads on tyres is more likely to skiddue to3. Choose the correct option: Friction, that exists between two surfaces incontact, when there is no relative motion between them, is calleda) Static frictionb) Rolling frictionc) Sliding frictiond) None of these4. State True or False: Sliding friction is greater than static friction.a) trueb) false5. State True or False: We can easily walk on frictionless surface.a) trueb) false6. Choose the correct option: Interlocking of irregularities on two surface incontact causea) Temperature b) Frictionc) Pressured) Motion7. Fill in the blanks: Sprinkling of powder on carom boardfriction8. State True or False: Friction opposes relative motion between the surfacesof the book and the table.a) trueb) false9. Least amount of friction is required in which of the following sports?a) Cricket b) Footballc) Hockey d) Ice skating10. State True or False: The brakes slow down or stop moving bicycle due tofriction.a) trueb) false11. What is streamlined?12. State True or False: It is easier to push than pull.a) trueb) false13. Which of the following surface will offer the least frictional force?a) Dry marble floorb) Wet marble floorc) Sand floord) Grass floor14. Which surface has the least amount of friction?a) iceb) grassc) sand d) None of these15. State True or False: Smooth surface has more irregularities than roughsurface.a) trueb) false |
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Answer» 1st answer because MOLECULES are very far in LIQUID s and GASES |
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| 47. |
What is angle of repose |
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Answer» Answer: the STEEPEST angle at which a sloping SURFACE formed of loose material is stable. "the angle of repose will vary LOCALLY ACCORDING to the mechanics of shape and strength" |
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| 48. |
Handling of sewage dumps sewage lines in environment and factories |
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Answer» Sewage treatment generally involves three stages, CALLED primary, secondary and tertiary treatment. Primary treatment consists of temporarily holding the sewage in a quiescent basin where HEAVY solids can SETTLE to the bottom while oil, grease and lighter solids float to the surface.ll the sewage from the toilet, shower, laundry and other areas enters waste and sewer pipes directly and is pumped to a lagoon. The sewage goes through a series of cutting blades which help break up the solid matter before it enters the lagoon. These blades are called MACERATOR .. . . PLEASE MARK IT A BRAINLIST |
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| 49. |
One simple question Frnd...Who invented examinations?? |
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Answer» please mark it a brainlist ..... . . . American PERSON called Henry Fischel (or Henry Mishel) who supposedly is the first person to invent Exams. |
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| 50. |
Large transformers, when used for some time, become very hot and are cooled by circulating oil. The heating of the transformer is due toA. the heating effect of current aloneB. hysteresis loss aloneC. both the heating effect of current and hysteresis lossD. intense sunlight at noonthanks❤❤ |
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Answer» Large transformers, when used for some time, become very hot and are cooled by CIRCULATING oil. The HEATING of the transformer is due to A. the heating effect of current alone B. HYSTERESIS LOSS alone C. both the heating effect of current and hysteresis loss D. INTENSE sunlight at noon Answer... Large transformers, when used for some time, become very hot and are cooled by circulating oil. The heating of the transformer is due to the heating effect of current alone THANKS❗❗ |
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