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. |
My work 720 at uniform speed of 2 metre per second then runs at uniform speed of 4 metre per second for 5 metre and then again walk at speed of 1 metre per second for 3 what is the average speed |
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Answer» Answer: Average Speed = Total Distance/Total Time Total Time = 1 minute (60s) + 2 minute (120S) = 3 minutes or 180 seconds Total Distance = (Speed1 x Time1) + (Speed2 + TIME2) = (1m/s x 60s) + (3m/s x 120s) = 60m + 360 m = 420 m Average Speed = 420m/180s = 2.333m/s or 8.39999 kmph Good LUCK Average Speed = Total Distance/Total Time Total Time = 1 minute (60s) + 2 minute (120s) = 3 minutes or 180 seconds Total Distance = (Speed1 x Time1) + (Speed2 + Time2) = (1m/s x 60s) + (3m/s x 120s) = 60m + 360 m = 420 m Average Speed = 420m/180s = 2.333m/s or 8.39999 kmph Good Luck |
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| 2. |
Mosquitoes are growing at a rate of 10%a year. If there were 200 mosquitoes inthe begining. Write down the number of mosquitoes after (i) 3 years (ii) 10 years(iii) n years. |
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Answer» I)260 II)400 iii)20n Explanation: (I) I = PTR/100 200*3*10/100 =60 so 60+200=260 mosquitoes after 3years (ii ) 200*10*10/100 = 200 so 200+200=400 mosquitoes after 10 years iii 200*N*10/100 = 20 n so 200 +20n mosquitoes after n years |
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| 3. |
The spectral lines in absorption and emission spectrum are:exactly same exactly different may be same or different all are correct |
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Answer» mmmmmmmmmmmmmmmmmmmmmmmmmmm bchcbfbcbxbbxxb vvv Explanation: mmmmmmmmmmmmmmmmmmmmmmmmmmm mmmmmmmmmmmmmmmmmmmmmmmmmmm TVV |
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| 4. |
TWO CONDUCTING WIRE OF THE SAME MATERIAL AND OF EQUAL LENGTH AND EQUAL DIAMETER ARE FIRST CONNECTED IN SERIES AND THEN PARALLEL IN A CIRCUIT ACROSS THE SAME POTENTIAL DEFFERENCE THE RATIO OF HEAT PRODUCED IN SERIES AND PARALLEL COMBINATION WOULD BE ? A)1:2 B)2:1 C) 1:4 D) 4:1 PLEASE TELL EXPLANATION ALSO |
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Answer» let RESISTANCE of each resistor be R then EQUIVALENT resistance in parallel CONNECTION is R/2 and equivalent resistance in series connection is 2R HEAT produced = IR*2 ratio of heat produced is I(2R)*2/I(R*2) ANS = 4:1 |
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| 5. |
What are the properties of electromagnetic force(IN LONG FORMS) |
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Answer» 1. It obeys the inverse square law. |
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| 6. |
Does pully violate conservation of energy |
| Answer» YES pully VIOLATE CONSERVATION of ENERGY | |
| 7. |
A bus starting from rest moves with a uniform motion acceleration of 0.2 meter per second square for 4 minutes .what is the speed and distance. |
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Answer» Initial velocity of BUS(U)= 0m/s |
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| 9. |
Differentiate between the reflection of light form a plane mirror and that from a plane sheet of paper each three points ICSE Class 9 Physics Chapter Reflection of Light |
| Answer» IMAGE formed by REFLECTION from a MIRROR will be SHARP but image formed by the reflection of paper will be blur. | |
| 10. |
A train is travelling at a speed of 90 km per hour .breaks are applied so as to produce a uniform acceleration of 0. negative 5 metre per second . find thow far the train will go before it goes to rest? |
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Answer» v=u+at 90km/hr=90*1000/3600m/s=25m/s 0=25-0.5t t=50s s=ut+0.5at^2 s=25*50-0.5*0.5*50^2 s=1250-625 s=625m |
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| 11. |
Why does resisitivity of a material increase with temperature whereas in case of semiconductors, it decreases ? |
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Answer» In semiconductors free electrons available for conduction are very LESS, hence when temp increases valence electrons jumps into upper energy layer & BECOMES free electrons, hence conductivity increases , hence resistance decreases. |
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| 12. |
Animes of two third of the size of the object is formed by convex lens at a distance of 12 cm from it find the focal length of the lens |
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Answer» Hkfgdjgkfkjfxxgjhckhkcgckgjxhcmhlvhkchkchhlcgckgjclhvljvjvlhkck |
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| 13. |
A bus starting from rest most with a uniform acceleration of 0.1 metre per second for 2 minutes. find the speed acquired and the distance travelled? |
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| 15. |
What is the formula for calculating the mass when force velocity and the time to rest is given |
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Answer» First U CALCULATE the acceleration by dividing the velocity with time and after it the DIVIDE the force with acceleration it gives you mass of OBJECTS |
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| 16. |
How we can ask BRAINLIEST questions? |
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Answer» The QUESTION you ASK is verified by the MODERATOR and they can MAKE it Brainiest question. |
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| 17. |
A racing car has a uniform acceleration of 4 metre per second. What distance will it cover in 10second after start? |
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Answer» USING the relation s = u t+ ½ a t² u = 0 m/s t = 10 sec a = 4 m/s² s = (0)(10) + ½(4)(10)² s = 200 meters Hope it's help you Please MARK me in brain list answer |
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| 18. |
Important topic related to weight class 11 |
| Answer» MEASUREMENTS and VECTORS | |
| 19. |
Why do we prefer an hot tea in saucer than cup |
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Answer» As saucer has more surface area than the cup, evaporation TAKES place FASTER in saucer. So tea BECOMES cold. That is the reason why we prefer saucer |
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| 20. |
Explain ohmic and non ohmic conductor |
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Answer» An ohmic is a CONDUCTOR that obeys OHM's law. And a NON ohmic conductor does not OBEY The Ohm's law..!! |
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| 21. |
Examples of circular motion |
| Answer» ROTATION of FAN rotation of WHEELS REVOLUTION of Earth etc | |
| 22. |
Definition of parallelogram of force. |
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Answer» a parallelogram illustrating the theorem that if TWO FORCES acting at a POINT are represented in MAGNITUDE and direction by two sides of a parallelogram MEETING at that point, their resultant is represented by the diagonal drawn from that point. |
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| 23. |
Give reason why plastic containers are used as storing devices? |
| Answer» DUE to its durability and Strong property it is used as STORING DEVICES | |
| 24. |
How relate the thermal conductivity and specific heat? |
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Answer» HEY MATE here is your ANSWER. . . . . . . . . sorry dear I have no IDEA what to do |
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| 25. |
Give detailed solution for example no. 03 |
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Answer» Here IA the solution to your Query.. HOPE this CLEAR your DOUBT.. |
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| 26. |
what is slow of velocity time graph. give one example of a motion in which the acceleration is in direction of motion and against the direction of the motion. |
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Answer» Slope give the acceleration |
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| 27. |
Does an inclined plane need GRAVITY to rule down a ball on it ? |
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Answer» It DEPENDS WHETHER there is FRICTION or not. |
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| 28. |
a cyclist covers first half of the distance with a speed v1m/s and second half distance with speed v2m/s . calculate the average speed of the cyclist |
| Answer» HOPE this will HELP you | |
| 29. |
Derif an expresion for value of g on surface of the earth |
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Answer» ʜᴇy ᴜꜱᴇʀ |
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| 30. |
Why friction is called as necessary evil ?? |
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Answer» Is is a general MISCONCEPTION that friction always OPPOSES motion between two bodies in contact ,but actually it opposes relative motion between two bodies in contact .In many CASES friction is found as the cause of motion .without friction it is impossible to imagine this world.Friction is evil in mechanical machines CAUSING wear and tear of parts.Friction causes wear and tear of tyre but in turn is impossible to ROTATE tyre…and many more. |
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| 31. |
a boy of mass 50kg running at 5m/s jumps on to a 20kg trolley travelling in the same direction at 1.5 m/s .what is their common velocity |
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Answer» M1V1 + m2v2 = (M1+M2)V M1 - MASS of boy =50kg V1 - SPEED of boy= 5m/s M2 mass of trolley = 20kg V2 - speed of trolley = 1.5 m/s V - final velocity Solving for v , we get , v = (250+30)/70 V = 4m/s I hope you GOT |
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| 32. |
What is earth gravitation force and earth gravitational acceleration |
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| 33. |
What is lubricants and it's ecamples |
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Answer» Lubricants are the ones which DECREASES the frictional FORCE |
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| 34. |
How many atom of each constituent elements are present in 50 gram of CaCo3 |
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Answer» 50 G CaCO3 will CONTAIN = 3 X 6.022 X 10^23 X 50/100 = 9.033 X 10^23 |
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| 35. |
Motion and rest are relative terms give reasion |
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Answer» REST and motion are the relative terms because they depend on the observer's frame of reference. ... So if two different OBSERVERS are not at rest with respect to each other, then they too GET different results when they observe THEMOTION or rest of a body. hope it helps please mark me as brainliest |
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| 36. |
an athlete completes one round of a circular track of diameter 200m in 40 seconds what will be the distance covered and the displacement at the end of 2 minutes 20 seconds |
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Answer» length AB=200m=2R |
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| 37. |
Relative terms between rest and motion |
| Answer» SUBJECT: Physics. LESSON :Motion and Time. Topic: Restand Motion. An object is said to be at rest if its POSITION does not change with time. If the object's position CHANGES with time, it is said to be in motion. | |
| 38. |
Applications of inertia of motion |
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Answer» Pessenger of a BUS MOVE BACKWARD when bus stops |
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| 39. |
What is universal circular motion derif and express it |
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Answer» In physics, CIRCULAR MOTION is a movement of an object along the circumference of a circle or rotation along a circular path. It can be uniform, with constant angular rate of rotation and constant speed, or non-uniform with a CHANGING rate of rotation |
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| 40. |
the ball isdropped from a height of 20m if its velocity increases uniformly at the rate of 10 M per second square with what velocity it will strike the ground after what time it will give to strike the ground |
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Answer» The VELOCITY will be 20m/s and the TIME will be 2S when it STRIKE the GROUND |
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| 41. |
An example to show the effect of heat generated in a machine due to friction |
| Answer» WEARING out of the SURFACE | |
| 42. |
A man in lift having a suitcase is standing is work done |
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| 43. |
State and explain Newton universal law of gravitation |
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Answer» It states that every point mass in the UNIVERSE ATTRACTS every other point mass with a force that is directly proportional to product of their MASSES and inversely proportional to square of the DISTANCE between then. |
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| 44. |
What is ether(in physics) |
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Answer» HI FRIEND..... |
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| 45. |
When a force acts on a body of 100gm, the change in velocity is 20cm/s. magnitude of this force is? |
| Answer» | |
| 46. |
find the rectangular component of a force of 20N if one of the component makes an angle of 60°.find two component |
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Answer» =20*1/2 =10 f [email protected] =20*√3/2 =10√3 |
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| 47. |
What is the weight of a body of mass 5 kg if g is equal to 10 M per second square |
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Answer» W = mg W = 5 * 10 = 50N |
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| 48. |
Give example of effect of heat seen in our daily life |
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Answer» SUN rays are GOOD EXAMPLE of heat heat is also produced in moving vechicles microwave or oven hope it helps |
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| 49. |
Obtain the relation between MKS and CGS unit of power |
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Answer» MKS is measured in : |
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