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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. |
Pls solve all the mcq s |
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Answer» A scalar QUANTITY is the one which can never take negative values.2.(c) Two vectors of DIFFERENT MAGNITUDES cannot have their resultant zero.3.(a) it is displaced parallel to itself.4.(a)5.(c) 5 units due west.6.(a) A+B7.(b)3 (as in the vector SUM of vectors having the same magnitude but opposite direction from the third vector)Cheers! |
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| 2. |
Rain is falling vertically at 8.0 ms- relative to the ground. The rain drops make tracks on the side window of a car at an angle of 30° below the horizontal. Calculate the speed of the car. |
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Answer» 18° from vertical or 72∘ from horizontally.Explanation:enter image source hereAir is MOVING horizontally with 40 km/h speedHorizontal velocity vector of AIR is SHOWN in figure.Velocity Vector of Raindrops is VERTICALLY downward .Let resulting Velocity of Raindrops makes angle θ from thevertical.Then angletanθ=vHorizontalvvericle=40120=13 θ=tan−1(13)≈18∘ Hence Raindrops makes angle 18∘ from the vertical or make angle 72∘ from Horizontal.Explanation:I I hope this is your answer please mark me brainly |
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| 3. |
Which plant was believed to brought by the Mughal emperor Babar to india |
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Answer» MARK ME AS BRAINLIESTExplanation:A SPECIAL type of Rose.The particular species of rose CALLED DAMASK Rose. |
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| 4. |
2. A circular track is made on which an athlete has to cover three rounds to complete a 1000 m run.During the run find the distance and magnitude ofdisplacement of the athlete.please solve this question |
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Answer» 1000mExplanation:CHECK the ATTACHMENT |
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| 5. |
The linear magnification of a convex lens is -1, when object in front of the lens is |
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Answer» so the image is also formed in the front of LENS . As the lens given is CONVEX lens . as V and U are same but v is negative. height of image is in negative also height of OBJECT in positive. HOPES ITS HELP U MARK IT AS A BRAINLIST ANSWER . FOLLOW ME . RATE THIS ANSWER . |
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| 6. |
Will aofIcurrent flow more easily turousthick wire or a thin wirethe some material, whenconnected to the same source? show pic |
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Answer» Hope so it is helpful pls FOLLOW me.. Mark me as brainliest.. Thankyou.. The CURRENT will flow more easily through a thick wire than through a thin wire of the same material when connected to the same source. This is due to the FACT that the RESISTANCE of a wire is inversly proportional to the SQUARE of its diameter. |
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| 7. |
The diameter of the moon is about 2160m |
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Answer» It's RADIUS is 180mExplanation:2160m ÷2=180m |
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| 8. |
How is avg kinetic energy of gas partlcles affected by chnaging the tempreture of gas from 50 cto 100 c |
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Answer» erage KINETIC energy of a gaseous MOLECULE is given by 1.5 RT This implies that avg.K.E is directly proportional to T.Thus, Avg. K.E. increases on INCREASING TEMPERATURE from 50 °C to 100 ° C and it increases 373/323 times. |
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| 10. |
The day before yestradas I was 25 years the next year I willbe 28 years This is to trueonly one day in a year ThenWhat is my birtholdy |
| Answer» MAY be your BIRTHDAY comes in the leap year,29 FEBRUARY.. By a guess | |
| 11. |
Hiii guys what is inscription |
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Answer» ▶Inscription : There are , to be SURE , fewer Inscriptions and no very lengthy ONES , but that to REFLECTS. ✔Hope It's HELP You ❤❇ |
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| 12. |
Find the Magnitude and direction of electricfeldatpoints A, B, and c due toto straight long parallelas showncharge linein the figure |
| Answer» L don't KNOW the ANSWER | |
| 13. |
A hill is inclined at theta with horizontal. What is the unit vector perpendicutar to hill in standard XY co-ordinate system in the direction as shown in fig 1 |
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Answer» 1 is not given so how can I ANSWER please ask this QUESTION again...SORRY |
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| 14. |
Show how you would connect three resistors, each of resistances 6ohm , so that the combination has a resistance of (i) 9 ohm ii) 4ohm |
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Answer» For 9ohm RESISTANCE, 2 resistors are in parallel and 1 is in SERIES with them.4ohm is not possible |
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| 15. |
A object is moving in circular path of radius r |
| Answer» 2*PI*rExplanation:CIRCUMFERENCE of CIRCLE =2*pi*R | |
| 16. |
A thin converging lens of power 6D and a thin diverging lens of power 2D are in contact. What is the focal length of the combination? |
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Answer» - LENS ConceptPower is related to focal length as POWER of a converging lens (CONVEX lens) is positive since focal length is positivePower of a diverging (CONCAVE) lens is negative since focal length is negative.EQUIVALENT focal length(f') of two lens is given having focal length f1 and f2 is given by Equivalent power of two lens is given as p' = P1 + P2.SOLUTIONSpower of converging lens = 6 Dpower of diverging lens = -2 D.Equivalent power = 6 - 2 = 4 D.Hence, focal length = 1/P = 1/4 = 0.25 mHence, focal length of the lens is 0.25 m. |
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| 17. |
An automobile starting from rest Speeds upto 12 m/s with a constant acceleration of 1.2 m/s²,runs at this speed For a time and finally comes to rest with a deceleration of 1.5 m/s².If the total distance travelled is 366m,Find the total time required |
| Answer» EXPLANATION:u=0m/sv=12m/sa=1.2m/s^2v2=0-a=-1.5m/s^2s=366mt=(v-u)/at=12-0/1.2=10 ss1=ut+1/2(at)^2s1=1/2*1.2*10*1.2*10=50*1.44=72ms2=366-72=294mu2=v=12m/ss=ut+1/2(at)^2294=12*t+1/2*2.25*t^2294=12t+2.25t^2/2t=11.6(APPROX.)TOTAL time=11.6+10=21.6 s | |
| 18. |
2*10^7 electrons are flowing through a conductor in 2 milliseconds how much current will flow? |
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Answer» 1.6*10^-9AExplanation:CURRENT I =Q/t=ne/tn=2*10^7 electronse=1.6*10^-19t=2*10^-3I=(2*10^7)(1.6*10^-19)/2*10^-3=1.6*10^-9 A |
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| 19. |
NEED HELP ASAP A property of mass that causes a system to move past equilibrium, resulting in harmonic motion. What is this? Inertia? |
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Answer» I think it is INERTIA as it is the poperty of matter which KEEPS it in motionExplanation:hope it HELPS |
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| 20. |
Moving a book placed on a table is a push or pull or both |
| Answer» UR ANSWER is : BothMark it as BRANLIEST | |
| 21. |
Derive the 4 equations of motion. |
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Answer» There are 3 EQUATIONS of motion brotherExplanation:Derivation of the Equations of Motion v = u + at Let us BEGIN with the first equation, v=u+at. This equation only talks about the acceleration, time, the INITIAL and the final velocity. Let us assume a body that has a mass “m” and initial velocity “u”. Let after time “t” its final velocity becomes “v” due to uniform acceleration “a”. Now we know that: Acceleration = Change in velocity/Time Taken Therefore, Acceleration = (Final Velocity-Initial Velocity) / Time Taken Hence, a = v-u /t or at = v-u Therefore, we have: v = u + at v² = u² + 2AS We have, v = u + at. Hence, we can write t = (v-u)/a Also, we know that, Distance = average velocity × Time Therefore, for constant acceleration we can write: Average velocity = (final velocity + initial velocty)/2 = (v+u)/2 Hence, Distance (s) = [(v+u)/2] × [(v-u)/a] or s = (v² – u²)/2a or 2as = v² – u² or v² = u² + 2as s = UT + ½at² Let the distance be “s”. We know that Distance = Average velocity × Time. Also, Average velocity = (u+v)/2 Therefore, Distance (s) = (u+v)/2 × t Also, from v = u + at, we have: s = (u+u+at)/2 × t = (2u+at)/2 × t s = (2ut+at²)/2 = 2ut/2 + at²/2 or s = ut +½ at² |
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| 22. |
An object moving along line the vilocity of moving object with time as follows |
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Answer» tion:HOPE it's helpful for you to GET RID of your question!! Have a great day ahead!!! |
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| 23. |
How does a battery maintain a constant potential difference between its terminals? |
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Answer» through the CHEMICAL ENERGY inside it which it GENERATES through chemical reactionExplanation:hope it helpspiz MARK as BRAINLIEST |
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| 24. |
What will be the charge flow through a metalic wire in one hour When a constant current of 0.2 ampere is flowing through it |
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Answer» Hello There! AnswersI = 0.5 At = 2 hours = 2 × 60 × 60 s = 7200 sThus, Q = It= 0.5 A × 7200 s= 3600 CWE know that 96487C = 6.023 X 1023 NUMBER of electrons.Then,3600 C= 6.023×10^23×3600/96487=2.25×10^22Hence, 2.25 X 10^22number of electrons will FLOW through the wire. |
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| 25. |
A light ray enters from medium A(water) to medium B(glass). The refractive index of medium B with respect to medium A will be? a) greater than unity b)less than unity c)equal to unity d)zero |
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Answer» If by UNITY you mean NORMAL (90°) then a Explanation: light ray bends AWAY from the normal |
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| 26. |
How is energy conserved in a roller coaster??? |
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Answer» By neglecting the influence of air resistance, it can be said that the total mechanical energy of the train of CARS is conserved during the RIDE. That is to say, the total amount of mechanical energy (KINETIC plus potential) POSSESSED by the cars is the same throughout the ride |
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| 27. |
Explain solar energy, cooker and pannel |
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Answer» hope it's helpfulExplanation:solar energy are the energy we GET from sun solar COOKER is the APPLIANCE which used for cooking solar pannel are the DEVICE which converts LIGHT energy to heat energy |
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| 28. |
When we will open refrigerator after 20 hours which part of our body will feel cold |
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Answer» Wait 24 hours to let the FRIDGE COMPLETELY DEFROST. 5. After 24 hours, CLOSE ALL doors on the refrigerato |
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| 29. |
a body is initially at a point 15m right of a pole where will be the body after4 seconds if it is moving with uniform speed of 10 m/towards right of the pole |
| Answer» TION:DISTANCE from pole= 15m RIGHTTIME= 4 sSpeed= 10m/sDistance travelled= 4*10=40mFinal position=15+40=55m to the RIGHT of the pole | |
| 31. |
One light wave is incident upon a plate of refracting index m . Incident angle i , for which refractive & reflective waves are mutuallyperpendicular will be a. i = 450b. i=sin−1(?)c. i = coesc−1(?)d. ?=tan−1(?) |
| Answer» OPTION d)tan^-1 i + 90°+ r =180° i+ r =90° r=90° -i (MIU) u=SIN i /sin r =sin i/ sin(90°- i) =sin i/ cos i (miu) u=tan i i=tan i ^-1(u) | |
| 32. |
In si units the differential equation of an shm is d^2x/dt^2=-36x. find its frequency and period |
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Answer» Given:Differential equation of SHM is provided as follows :To find:FrequencyTime period of SHMCalculation:We know that 2nd order derivative of displacement FUNCTION ALWAYS GIVES US Acceleration . So , we can say that :So time period be TLet frequency be f |
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| 33. |
Why non metal do not react with Base |
| Answer» ALS are themselves acceptors of electrons so there is no way they can donate electrons to the hydrogen ION of the acid. Hence, non-metals in general do not REACT with dilute ACIDS. | |
| 34. |
A body of of mass 2kg was dropped from the top of the building .It has kinetic energy of 900J when it hits the ground the height of the building was? |
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Answer» i don't knowExplanation: |
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| 35. |
If the frequency of an object in uniform circular motion is doubled, its acceleration becomes (1) Two times(2) Four times(3) Half(4) One fourth |
| Answer» 3) hope you got the answer please MAKE me BRAINIST | |
| 36. |
A light pail containing water is attached to a light rope and swung around in a vertical circle. The radius of the circular motion is 1.0 m. The water just manages to stay in the pail at the highest point of motion. What is the linear speed of the pail at the lowest point of motion? Select one or more: A. 3.13 ms-1 B. 7.00 ms-1 C. 5.42 ms-1 D. 7.87 ms-1 Question 2 Not yet answered Marked out of 2.00 Flag question Question text Which of the following statements is not true for a stone attached to a string and swung in a uniform vertical circular motion? Select one or more: A. The resultant acceleration is always directed towards the centre of the circle. B. The kinetic energy of the stone is constant throughout the entire circular motion. C. The magnitude of resultant force acting on the stone changes depending on the position of the stone in the circle. D. The tension in the string is lowest when the stone is at the highest point of the circular motion. Question 3 Not yet answered Marked out of 2.00 Flag question Question text The combined mass of a race car and its driver is 600 kg. Travelling at constant speed, the car completes one lap around a circular track of radius 160 m in a total time of 36 s. What is the magnitude of the centripetal acceleration of the car? Select one or more: A. 100 ms-2 B. 0.17 ms-2 C. 2900 ms-2 D. 4.9 ms-2 Question 4 Not yet answered Marked out of 2.00 Flag question Question text The clock on Big Ben has a minute hand of length 4.3 m and an hour hand of length 2.7 m. What is the ratio of the centripetal acceleration of a point on the tip of the minute hand to a point on the tip of the hour hand? Select one or more: A. 230 B. 5700 C. 1.6 D. 150 Question 5 Not yet answered Marked out of 2.00 Flag question Question text A car is making a turn at speed v. The radius of the turn is r and the centripetal force on the car is F. If the car rounds the same curve at speed 2v, the required centripetal force is: Select one: A. 4F B. 1/2F C. 2F D. F |
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Answer» a)3.13ms^-1Explanation:the velocity at the HIGHEST POINT of the circular MOTION is (gr)^1/2=(9.8*1.0)=9.8=(gr)^1/2=(9.8)^1/2=3.1303 ms^-1 |
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| 37. |
Give difference between accelaration and displacement |
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Answer» he difference between displacement and acceleration. is that displacement is (physics) a vector quantity which denotes distance with a directional component while acceleration is (physics) the CHANGE of velocity with RESPECT to time (can INCLUDE deceleration or changing direction).Explanation: |
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| 38. |
Notes on electromagnetic induction of class 10 |
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Answer» r the MAGNETIC flux LINKED with an electric CIRCUIT changes, an EMF is induced in the circuit. This phenomenon is called electromagnetic induction. (i) Whenever the magnetic flux linked with a circuit changes, an induced emf is produced in it. |
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| 39. |
A property of mass that causes a system to move past equilibrium, resulting in harmonic motion. What is this? |
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Answer» i ALSO don't know the ANSWER!!!pls MARK me down as BRAINIEST answer!!! |
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| 41. |
If kinetic energy of a body is increased by 300% then percentage change in momentum will be(1) 100%(2) 150%(3) 265%(4) 73.2% |
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Answer» 173.2%Explanation:SINCE KE= mv²/2KE2/KE1= V2²/V1²= 3=> V2/V1= √3momentum= mv=> mv2/mv1= √3×mincrement = √3% INCREMENT in MOMENTUM= √3×100 = 173.2% |
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| 42. |
.Which of the following does NOT involve motion? * *A plant growing towards a light *Walking on the Moon *Car taking off when traffic lights turn green *None of the above |
| Answer» NONE of the above MENTIONED in the QUESTION | |
| 43. |
Two bulbs A and B are connected to a 220V main supply. The maximum current that can flow through A and B is 0.5A and 1.2A respectively. The effective resistance of two bulbs in series and in parallel is 280Ω and 60Ω respectively. Which of the two bulbs will fuse when connected in series. What happens when they are connected in parallel . |
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Answer» current FLOWING when connected to series is v=IRI=v/RI=220/280I=0.7Atherefore the blub A having minimum current capacity 0.5A will fusethen in paralle l=220/60=3.5Aboth the bulb will fuse when connected in parallel because the current RANGE is more then their current capacity that is 0.5 and 1.2 Ahope so helpful.good QUESTION.... |
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| 44. |
Two bulbs A and B are connected to a 220V main supply. The maximum current that can flow through A and B is 0.5A and 1.2A respectively. The effective resistance of two bulbs in series and in parallel is 280Ω and 60Ω respectively. Which of the two bulbs will fuse when connected in series. What happens when they are connected in parallel . Please answer me , its really urgent. |
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| 45. |
A body goes round with the constant speed in a circular motion. Is the motion acceleration or uniform |
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| 46. |
A reheat cycle with two stages of reheating is executed. with steam expanding initially from 90 bar and 530°C. The two reheater pressures are 10 bar and 0.6 bar, and the steam leaves each reheater at 480°C. Condensation occurs at 0.03 bar. For an ideal cycle, find (a) Q and e. (b) For the engine, ignore the pressure drop through the reheaters, let the engine operate through the same states, and compute W and e. (c) What is the steam flow rate for an engine output of 20,000 kW? Ans. (a) 4657.5 kJ/kg, 44.31%; (b) 2072.6 kJ/kg, 44.41%; (c) 9.65 kg/s |
| Answer» SORRY I don't know the ANSWER EXPLANATION:I am also CONFUSED in physics sorry | |
| 47. |
Derived an eq for potential due to point charge? |
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Answer» The 'ELECTRIC POTENTIAL' due to a point charge is kq/r. Solution: Let us consider q' be the point charge PLACED at a distance r from the charge q. The electric potential is defined as the work done to bring a point charge to a particular position. |
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| 48. |
Which forms of energy a transformed in a electric bulb? very short answer type question . |
| Answer» HEAT ENERGY is USED in a ELECTRIC BULB. | |
| 49. |
An object is placed at 60 what image distance focal length |
| Answer» EXPLANATION:HOPE it HELPS | |