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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. |
Compute the ratio of the gravitational force and electrostatic force between an electron (mass =9.1×10^-31kg) and a proton(mass 1.7×10^27kg).Given e=1.6×10^-19 C. G=6.67×10^-11 Nm^2/kg^2. ANSWER ONLY IF YOU KNOW !! |
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Answer» 10^(-40)════════════════════↪Actually welcome to the concept of Electrostatic FORCE and mixture of Gravitational forceGIVEN—The gravitational force : Electric force mass(mc = 9.1 × 10¯³¹ kgproton of mass (mp) = 1.7 × 10¯²⁷ kge = 1.6 × 10¯¹⁹ CG= 6.67 × 10¯¹¹ Nm²/ kg²Mass of electron=9.1 × 10¯³¹ kg value GIVEN in the question is wrong.Let US assume electron and proton are placed with separation distance metre.Gravitational force FgFg = G. (mp×me) /r²On putting Fg = Simillarly Electrostatic force FEFE ∴Therefore Fg/Fe = 4.47 × 10^(-40) |
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| 2. |
● If each resistance is 1 oℎm, find the equivalent resistance of the circuit. ● What is the value you will get from the ammeter?● What is the value you will get from the voltmeter? |
| Answer» TION:fjxtizfjy6£*--£ | |
| 3. |
What is incident ray |
| Answer» INCIDENT Ray is DEFINED as that Ray of LIGHT which falls on the mirror surface. | |
| 4. |
Calculate the pressure exerted by a brick, which applies a force of 2.5 N, when (a) it is placed upright on the soil, (b) when it is placed on it's widest base. The dimensions of the brik are 25 cm * 10cm * 5cm. Please give right answer I spend my all points. |
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Answer» en the BRIK is placed up RIGHT:Area in contact with soil therefore Pressure EXERTED(B). When the brick is placed on it's widest base:Area in contact with soil therefore Pressure exerted |
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| 5. |
What is parallelogram law of force |
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Answer» e here is your Answer------------------------ ✔️✔️ The law of parallelogram of forces STATES that if TWO vectors acting on a particle at the same TIME be represented in magnitude and direction by the two ADJACENT sides of a parallelogram drawn from a point their resultant vector is represented in magnitude and direction by the diagonal of the parallelogram drawn from .....HOPE IT HELPS |
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| 6. |
Kinetic energy of a particle (K.E) moving along x-axis depends on its position (x) and time (t) as KE = At^2/B+x^1/2 +Cx^3/2 / D+t^2 . The dimensional formula of ABC/D is |
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Answer» placement of a particle at time t is given s = ut + 1/2at2At time (t - 1), the displacement of a particle is given byS' = u (t-1) + 1/2a(t-1)2 So, Displacement in the LAST 1 second is,St = S - S'= ut + 1/2 at2 – [u(t-1)+1/2 a(t-1)2 ]= ut + 1/2at2 - ut + u - 1/2a(t - 1)2= 1/2at2 + u - 1/2 a (t+1-2t) = 1/2at2 + u - 1/2at2 - a/2 + ATS = u + a/2(2t - 1)(B) Putting the values of u = 2 m/s, a = 1 m/s2 and t = 5 sec, we getS = 2 + 1/2(2 x 5 - 1) = 2 + 1/2 x 9= 2 + 4.5 = 6.5 m (Ans): 6.5 m |
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| 7. |
35 14) 1.5 m/sA person driving a car with a speed 72 km/h, suddenly sees a boy crossing the road. If the distance movedby car, before the person applies brakes is 5 m, the reaction time of the person is(1) 0.5 s(2) 0.10 S(3) 10 s247 0.25s |
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| 9. |
A force F is applied on a square area of side L. If the percentage error in the measurement of L is 2% and that in F is 4%, the maximum percentage error in pressure is |
| Answer» 8%EXPLANATION:Pressure=force/area where F=4%, L=2%P=F/L squareP=4+2×2=4+4=8%. | |
| 10. |
What are the trends of valency |
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Answer» te☺️One of the trends in the MODERN PERIODIC table is that of the valency of an atom. As you already know, the valency of an atom is the NUMBER of electrons it has in its outermost shell or the number of atoms in REQUIRES to COMPLETE its outermost shell. |
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| 11. |
if people do not believe that how mathematics is simple, it is only because they do not realize that how life is complicated |
| Answer» SAHI KHA YAAR........ | |
| 12. |
If A.B=1ĀXBI; then what will be the resultant a-b? |
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Answer» ultant is |
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| 14. |
The minimum speed for a particle at the lowest point of a vertical circle of radius R to describe the circle is 'v'. If the radius of the circle is reducedto one-fourth of its value, the corresponding minimum speed will be |
| Answer» TION:SINCE SPEED is directly proportional to radius, the MINIMUM speed should be v/4 | |
| 15. |
30. The equation of a projectile is y = ax - bx2. Its horizontal range is(1) b(3) atb(4) b-a |
| Answer» 4. b-a is the correct ANSWEREXPLANATION:HOPE THIS HELPS YOU.Please MARK it BRAINLIEST | |
| 16. |
Please say answer of question number 46. |
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Answer» i think 3.6 sorry if WRONG EXPLANATION:hope it will be HELPFUL for U... ❤❤❤ |
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| 17. |
Why the cloud seems black |
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Answer» it is the thickness or HEIGHT of CLOUD which make it seems BLACK. |
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| 18. |
Cis vector sum of A and B ie. C=A+B, for C=A+B to be true what is the angel between A and B vector? |
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Answer» we can FIND the ANGLE between TWO VECTOR by tanm=perpendicular/base |
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| 19. |
A stone dropped from top of a well reaches the surface of water in 2 seconds,find the velocity of stone while it touches the surface of water and what is the depth of the water surface from top of well(g=10m/S2) ( |
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Answer» v=u+gtv=10×2 =20M/sv^2=u^2+2gh 20^2=2×10×hh=400/20 =20m |
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| 20. |
Find the tension in the string when the string makes an angle of 60° withthe upward vertical. |
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Answer» mass of the BLOCK m.after DIVIDING the vector COMPONENTS, we get Tcos60=T/2, the VERTICAL component of TTsin60=T√3/2 , the horizontal component of T. T/2= mgor,T=mg/2 |
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| 21. |
- 11713_- 8x10 Xsts Xlo x65x107coism? |
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| 22. |
A and B are two stations on a straight line at a distance of o stations on a straight line at a distance of 300 m. A train has to start from A and to stop at B.The maximum acceleration and retardation which may bellion and retardation which may be imparted to train are 5 m/s and 3 m/s respectivelythen the minimum time taken by train to reach from A to B is: |
| Answer» TION:SEE the ATTACHMENT...... | |
| 23. |
A body of mass 10 kg tied to a string which is fixed at one end is given a velocity of 10 ms at the bottom so that it is whirled in a vertical circlelength of the string is 2 m. (g = 10 ms 2) |
| Answer» TION:what is your QUESTION? | |
| 24. |
A body of mass 10 kg tied to a string which is fixed at one end is given a velocity of 10 ms' at the bottom so that it is whirled in a vertical circlelength of the string is 2 m. (g = 10 ms?) (MAQ)1) Its velocity at highest point is 2,5ms2) The tension in string highest point is 5 N.3) Its velocity at highest point is 5 ms?4) The tension in string at highest point is zero. |
| Answer» 4)EXPLANATION: | |
| 25. |
Two factors having equal magnitude 'p' are at an angle theta with each other. the value of theta when magnitude of their resultant is- (I)zero(ii)2p(III)p(iv)p√2 |
| Answer» | |
| 26. |
Define pressure in fluids.physics question |
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Answer» Fluid pressure is a measurement of the force per unit area on a object in the fluid or on the SURFACE of a CLOSED container. This pressure can be caused by gravity, acceleration, or by forces outside a closed container. SINCE a fluid has no definite SHAPE, its pressure applies in all DIRECTIONS. |
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| 27. |
An object of mass 2 kg is whirled round in a vertical circle of radius 1 m with a constant speed of 4 msl. The maximum tension in the string is(g = 10 ms) |
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Answer» T=mg +mv²/rExplanation:as it is MOVING with a CONSTANT VELOCITY then ACCELERATION is 0. |
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| 28. |
27. A projectile is thrown into space so as to have a maximum possible horizontal range of 400 metres.Taking the point of projection as the origin, theco-ordinates of the point where the velocity of theprojectile is minimum are(1) (400, 100) (2) (200, 100)(3) (400, 200) (4) (200, 200) |
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Answer» Explanation:At MAX height velocity has only ONE component ALONG x axis .. so velocity is minimum at MAXIMUM height |
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| 29. |
3. A bob of mass 100 g is suspended from the ceiling of a trolley of mass 900 g. If the trolley accelerates horizontally, the string makes an angle theta= 30° with the vertical. Value of force needed to provide this acceleration to trolley will be (g = 9.8 m/s2) |
| Answer» | |
| 30. |
If a vector has an x components of -25 units and a y component of 40 units ,then the magnitude and direction of vector is |
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Answer» magnitudeunder ROOT 25^2+40^2direction tantheta=40/25 |
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| 31. |
A given velocity is 2i+3j what is acceleration of particle |
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Answer» tion:Given velocity ,v=(2i+3j)ms^-1 THEREFORE acceleration, a= d/dt(2i+3j)=0 that is, there is no acceleration because velocity REMAINS constant. |
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| 32. |
a particle of mass m and change q moving with velocity v enter the region of uniform magnitic field at right angle to the direction if its motion. how its kinetic energy get affected. |
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Answer» Explanation:As we know the LORENTZ force is given by:: F=q(V×B) i.e the force experienced by the CHARGE particle moving inside a UNIFORM MAGNETIC field is a result of the vector product of its velocity and resultant magnetic field. Therefore, F. B=0….(1) &F.V=0…(2) i. e force is PERPENDICULAR to both magnetic field vector and velocity vector. Hence the magnitude of velocity vector remains constant and so as the kinetic energy of the charge particle. |
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| 33. |
Solve the following example...................plzzz |
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Answer» Force= ma here, m=16kg and a=3m/s^2Therefore, F= 16*3= 48 NNow same force is applied to 24 kg OBJECT then acceleration= F/m = 48/24=2m/s^2hope you like it!!! |
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| 34. |
If 2 ml of acetic acid was added slowly in drops to 5ml of water then we will notice[ ]a) The acid forms a separate layer on the top of water.b) Water forms a separate layer on the top of the acid.c) Formation of a clear and homogenous solution.d) Formation of a pink and clear solution. |
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Answer» AnzjfkcmjsjskdldzlsjjsxjjxslsllzdkdkExplanation:Ayshbdhsjzksoaapiwksjsjsjsjj |
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| 35. |
Why magnet 2 is weaker |
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Answer» magnet b is WEAKER because it has lesser MAGNETIC FIELD then AEXPLANATION: |
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| 36. |
124 Blosreely. I the displacement in the last second is equal to the displacement in theirAnd theme of free fall08(2) 10(3) 15 s(41.20 s |
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| 37. |
Question no. 23 explain please |
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Answer» I don't KNOW the ANSWERRRRRRR |
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| 38. |
Th the particles are projected simultaneously assuming that none of the projectiles fall to ground tiles collide in air. Answer the following questions:u60°16.The relation between u and v for the projectiles to collide is:V 1(A) = 2 (B)(C) = 2/2u(D)u-2127.The time after which the projectiles collide is:4d2d 2(B)A) (13+1)u13 (13+1)v2d273(73 +1)2d13(3+1)3.The horizontal distance covered by A before collision is: |
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Answer» the particles after the project I 4d 2d2 B 13+1 13(73+1) the horizon DISTANCE covered by a before COLLINS is 3 13( 13 +1 ) |
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| 39. |
A particle is moving with the initial speed 72kmph and acceleration 'a'. If distance covered by particle in 2s is 100m,then find value of a. |
| Answer» EXPLANATION:u=72kmph=20m/ss=ut+1/2at^2100=20×2+1/2 a2^2100=40+1/2×4a100=40+2a2a=100-40a=60/2a=30HOPE THIS HELPS YOUMARK AS BRAINLIESTTHANKYOU! | |
| 40. |
. A ball rolls off the top of a stair way with a horizontal velocity 10/10 m/s. If the steps are 0.25 m high and 5 m wide then the ball will hit the edge of the nth step where n is(1) 6(2) 2(3) 4(4) 3 |
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Answer» hyyy MATE......here is ur ANSWEREXPLANATION:PLZ MARK as brilliant |
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| 41. |
An organic compound with molecular formula C₂H₄O₂.produces brisk effervescence on additionof sodium carbonate /bicarbonate. Answer the following:a. Identify the organic compound.b. Write the chemical equation for the above reaction. c. Name the gas evolved.d. How will you test the gas evolved? e. List two important uses of the above compound. |
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Answer» udent,◆ Answers with explanation -(a) Unknown organic compound is erhanoic ACID (CH3COOH).(B) Ethanoic acid react with sodium carbonate to form sodium acetate with effervescence of CO2 gas.2CH3COOH + Na2CO3 --> 2CH3COONa + CO2 + H2O(c) CO2 gas is evolved which produces BRISK effervescence.(d) Presence of CO2 gas is tested by passing it through lime WATER. It turns the limewater milky.CO2 + Ca(OH)2 --> CaCO3 + H2O(e) Uses of ethanoic acid -industrial solventfood preservativeproduction of polymerscancer drugsHope this helps you... |
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| 42. |
1ml glacial acetic acid and 1ml of ethanol are mixed together in a test tube. Few drops ofconcentrate sulphuric acid is added in the mixture are warmed in a water bath for 5 min.Answer the following:a. Name the resultant compound formed. b. Represent the above change by a chemical equation. c. What term is given to such a reactions. d. What are the special characteristics of the compound formed? ( |
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Answer» udent,◆ Answers -(a) RESULTANT COMPOUND formed is ETHYL ethanoate (CH3COOCH2CH3).(b) Reaction of ethanol and ethanoic acid in presence of conc.H2SO4 gives ethyl ethanoate and water.CH3COOH + CH3CH2OH --> CH3COOCH2CH3 + H2O(c) This type of reaction is called esterification reaction (formation of esters).(d) Ethyl ethanoate is colorless liquid with sweet smell. It is used as solvent for many reactions.Thanks DEAR... |
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| 44. |
Suggest a chemical test to distinguish between ethanol and ethanoic acid and explain the procedure. |
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Answer» the litmus PAPER test EXPLANATION:ETHANOIC ACID is is being an acid TENDS to turn blue Litmus Paper into red while the the ethanol can't do so and do nothing with the Litmus Paper. |
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| 45. |
27×3472 find anti log |
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Answer» 120 is the correct ADDRESS you very much APPRECIATED the opportunity to work together on the correct information if you have any QUESTIONS or CONCERNS please visit the correct information if you have any questions or concerns please visit the plug-in settings for this QUESTION is about to work with you have any questions or concerns please visit the plug-in settings for this question is about to work with you have any questions or concerns please |
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| 46. |
A stone is thrown vertically from the top of the tower with an initial velocity of 10ms . It strikes the stone at the ground after 2 second. The velocity of the stone at the time of its strike is : |
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Answer» 2.8m/s^2Explanation:s=ut+1/2at^2 SA FIND KARO s=?(g=9.8). V=√2gs. we get FINAL velocity |
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| 47. |
(55) એ ક મશીનગન પ્રત્યેક સેકન્ડમાં 20 ગોળીઓ ટાર્ગેટ તરફ છોડે છે. દરેક ગોળીનું દળ 150 g અને ઝડપ 800 m/s હોય , તો ગનને યોગ્યસ્થિતિમ માં પકડી રાખવા માટે જરૂરી બળ ... N(A) 800 (B) 1000 (C) 1200 (D) 2400 |
| Answer» CEXPLANATION: | |
| 48. |
When two forces 5N and 7N acts on a body then the resultant on the body? |
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Answer» e resultant FORCE is 12N in the DIRECTION opposite to the APPLIED force |
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| 49. |
27. Two carbon compounds A and B have molecular formula C₃H₈ and C₃H₆ respectively. Which one of the two is most likely to show addition? |
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Answer» (a) C3H6 will SHOW addition REACTION as it is an UNSATURATED HYDROCARBON |
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