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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. |
If we heat a misture of iron and sulpher can we saprate the iron with the help of megnat? |
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Answer» Answer: No Explanation: No,If we HEAT a mixture of iron and sulphur we cannot separate them with a magnet. They can only be separated by chemical METHODS as we get ferrous sulphide (FeS) which is a COMPOUND. Since it is a compound it cannot be separated by physical methods such as using a magnet. It can only be separated by using some chemical methods which are difficult and complex. HOPE it helps you Please Mark as Brainalist |
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| 2. |
4th equation of uniformaly accelerated motion for (Sn). |
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Answer» the fourth equation for uniformly accelerated motion says about the DISTANCE COVERED by a PARTICLE in it's nth second . it's given by : SN = u + 1/2a(2n-1) |
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| 3. |
Why colour of sky is blue |
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Answer» Because of AIR MOLECULES PRESENT In the ATMOSPHERE |
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| 4. |
What is the difference between RTD and thermocouple |
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Answer» Answer: RTD vs Thermocouple. ... In CONTRAST, certain THERMOCOUPLES can be used to measure up to 2700 degrees Fahrenheit. RTDs are superior to thermocouples in that their readings are more ACCURATE and more REPEATABLE. Repeatable means that USERS reading the same temperatures produce the same results over multiple trials. |
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| 6. |
Write any two conservation laws. |
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Answer» In physics, a conservation LAW states that a particular measurable property of an isolated physical system does not CHANGE as the system evolves over time. EXACT conservation laws include conservation of ENERGY, conservation of LINEAR momentum, conservation of angular momentum, and conservation of electric charge. |
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| 7. |
What is the importance of pH value in our daily life with examples |
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Answer» Answer: Uses of pH in your daily LIFE are as follows: Explanation: 1.In our digestive system :Hydrochloric acid produced in our stomach HELPS the digestion of FOOD without CAUSING any HARM to the stomach. ... 2.Acids cause tooth decay : When we eat sugary food, it gets degraded by bacteria present in the mouth and an acid is formed. |
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| 8. |
The energy gap between conductor band and valance band is of order of 0.7ev .it is a |
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| 9. |
A particle moves in a circle with constant speed of 15m/s. The radius of the circle is 2m.Determine the centripetal acceleration of the particle |
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Answer» CENTRIPETAL acceleration=v^2/r v=15m/s r=2m a=225/2 a=112.5m/s^2 |
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| 10. |
The energy gap between conduction band is of order of 0.7ev .it is a |
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Answer» It is a SILICON SEMICONDUCTOR |
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| 11. |
If the wire of resistance of 160 ohm is doubled. Find the resistance of New wire |
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Answer» r=pl/a a×l=A×2l A=a/2 r=4pl/a 640 |
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| 12. |
1) A train is moving eastward at 10 m/sec.A waiter is walking eastward at 1.2m/sec; and a fly is charging toward thenorth across the waiter's tray at 2 m/s.What is the velocity of the fly relative toEarth |
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Answer» I AM NOT INTERESTED OK OK OK OK |
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| 13. |
show that vector a bar =2 i cap + 3 j cap +6 k cap,b bar =3 i cap - 6 j cap + 2 k cap and c bar = 6 i cap + 2j cap - 3 j cap are mutually perpendicular. |
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Answer» I don't KNOW what is the answer |
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| 14. |
Commonly used gadget or device |
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Answer» Answer: Heya MATE.....Your answer is in your HANDS i.e. mobile PHONES. Hope it HELPS..... |
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| 15. |
What+is+the+value+of+g+on+earth+and+moon |
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Answer» Answer: The value of G of EARTH is 10 or 9.8 m/s^2 The value of g on MOON is 1.62 m/s^2 |
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| 16. |
The ratio Resistance of two resistors a and b is in ratio 1:4 |
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Answer» so? what is your QUESTION |
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| 17. |
A man weighs 600 N at earth's surface at what height above the surface of Earth will he weigh 300 Newton take radius of the earth to be 6400 km .please answer this question step by step.(Answer is 1600 km) |
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Answer» Explanation: First of all on Earth's surface g is 10m/s2 so the mass of the man is : 600/10 kg = 60 kg . so when it's taken to a height x above the Earth's surface its weight is 300 N. then g there will be : (300/60)m/s2 = 5 m/s2 Now we know on GOING away from the Earth's surface the acceleration due to gravity decreases eventually . it can be expressed by the formula g' = g/(1+h/R)^2 here, g' = g/2 R = 6400km so putting the values g/2 = g/(1+h/6400)^2 or , 1/2 = (1+h/6400)^-2 or , 1/2 = (1-2h/6400) [ applying the LAW of binomial THEOREM ] or, h = 1600 KM. |
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| 18. |
Force = alpha time what does alpha stands here |
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Answer» Answer: I THINK here you want to MENTION F=alpha×TIME If this is the case then it MAY be momentum/t^2 ( t= time) |
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| 19. |
Calculate the charge passing through a lamp in 2min .If the current is 300MA [1ma=1oraise to -3 |
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| 20. |
Give one example from the nature showing the evidence of universal of gravitation |
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Answer» Explanation: when will release an object from a height it falls down due to the force of attraction of gravitation of Earth |
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| 21. |
How a writing pen does not follow bernoulli's theorem???? |
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| 22. |
The resistivity of the metal increases with increase in temperature |
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Answer» Answer:this collisions impede their movement and this property of the material is called resistance. The temperature of metal is RAISED the atoms vibrates more strongly and the ELECTRONS make more collisions with them them and so the resistance of metal INCREASED |
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| 23. |
What do you understand by coefficient of viscosity liquids write its unit and dimention |
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Answer» Explanation: the coefficient of viscosity of fluid is define as the BACKWARD viscous force between two adjacent layer having UNIT area of CONTACT and maintaining a unit viscosity gradient between them the SI unit of viscosity is PASCAL second or Newton per metre SQUARE second dimension of viscosity is M L to the power mins and T to the power mins 1 |
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| 24. |
Express 7800 angstrom in nanometer and meter |
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Answer» in NANOMETER =0.1 |
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| 25. |
Which of the following is not fundamental unit?1cm,2kg,3centigrade,4volt which one is correct |
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Answer» 3 CENTIGRADE is a CORRECT answer |
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| 26. |
A particle moves along a straight line OX. |
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Answer» the PARTICLE POSSES a speed and FORCE is acting PARALLEL to motion of that particle |
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| 27. |
two resistors are connected in series with each other and across a voltage source the resistance of resistor A is twice that of resistor B if the current in resistor A is I the current in resistor B is |
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Answer» Answer: Current REMAINS same in both resistors as they are CONNECTED in SERIES. Its tricky! Only voltage CHANGES in each RESISTOR |
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| 28. |
Why we need shadow? |
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Answer» To FORM a shadow a source of LIGHT is required. It is only when light rays are OBSTRUCTED we get the shadow of the object. The size of the shadow keeps on changing with the position of the sun. Shadows are always formed on the opposite SIDE. |
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| 31. |
Q12 plz answer as fastandard as possible plzzzzz |
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Answer» absjjs shjejri jsskir jskorid js odkns ok now |
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| 32. |
1.State the condition when the magnitude of velocity and speed of an object are equal |
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Answer» Answer: In Circular MOTION . Explanation: when the object PERFORMS circular motion then at that TIME magnitude of velocity and speed are same. But the direction of object's velocity is TANGENTIAL. |
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| 33. |
Wave motion is doubly periodic. explain |
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Answer» Answer: Wave motion is both periodic in space and periodic in time. HENCE it is a doubly periodic PHENOMENON. ... The velocity of a wave is constant in a given medium, whereas the velocity of the particles CHANGES, being MAXIMUM in the MEAN position and minimum at the extreme position. |
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| 34. |
a bullet of mass 1 kg moving with 200ms hits a wooden plank and emerges out if the work done by planks on bullet is 500J calculate the emergent velocity of bullet |
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Answer» Answer: 197.5 m/s Explanation: Initial KINETIC energy of bullet = 0.5mv² = 0.5 × 1 kg × (200 m/s)² = 20000 J = 20 kJ Work done by plank = 500 J Energy left = 20000 J - 500 J = 19500 J From CONSERVATION of energy Final Kinetic energy of bullet = 19500 J Emergent velocity of bullet = v' 0.5mv'² = 19500 J v' = SQRT(19500 J / (0.5 × 1 kg)) = 197.5 m/s |
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| 35. |
Disadvantages of physics in points 7 to 15 |
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Answer» Explanation: On first glance it is difficult to see what the disadvantages of physics could be in society. The discoveries that have been made by physicians have influenced human life, for the better, in a huge number of ways. The disadvantages of physics are topics that are widely debated and are often down to personal judgment. A few of the disadvantages that are brought up the most frequently are listed below. • Religion. Those who strictly follow FAITH sometimes believe that physics is disadvantageous in the way that the evidence can prove their beliefs to be wrong. This can be said particularly about the Big Bang Theory. Many religious followers reject the evidence that is given by physicians about the origin of the universe and argue that it disadvantages them in the way that it attempts to prove their theory is wrong. • Nuclear. One of the biggest arguments in recent TIMES about the effects of physics is that of nuclear power. Although nuclear power helps more than it harms, a LOT of people argue that its disadvantages can be globally fatal should something go terribly wrong. • Animal Testing. Some research carried out by physicians is experimented on animals. This has strong negative connotations and is seen as a big disadvantage in those fields. The argument against this viewpoint is would they rather carry out the experiments on humans? Or even not experiment to find crucial medical treatments? • Eco-Friendly. Not all of the creations and discoveries made by physicians are eco-friendly. In a world where global warming is being threatened, physics is sometimes to blame. What NEEDS to be taken into consideration, however, is that it is most likely to be physicians and other scientists who help come up with the eco-friendly solutions. While it could be argued that there are many disadvantages of physics in society, it is important to consider the advantages as well. Both come hand in hand and in most cases it would be impossible to have the advantages of physics without some disadvantages along the way. |
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| 36. |
A ball is thrown vertically upwards. It goes to a height 20m and then returns to the ground. Taking acceleration due to gravity g to be 10m/s^2, find:1) the initial velocity of the ball. 2) the final velocity of the ball on reaching the ground 3) the total time of journey of the ball [ show me the process please. answers given 1) 20m/s 2) 20m/s 3) 4s] |
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Answer» Answer: a) The initial velocity of the ball is 20m/s : As it REACHES a maximum height of 20m and the acceleration is 10m/s^2. So in order to reach a height of 20m ,with an acc. in opp. DIRECTION it has to move with 20m/s b) 20m/s As the velocity of any OBJECT thrown upward with some speed LANDS on the GROUND with the sane speed c) use v=u+at 0=20-10t »t=2 sec but this is the time it reach the max. height so it will take 2 more sec to reach ground » Time = 4 sec hope...it...helps.. |
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| 37. |
21. A body is moving with constant acceleration,a = 5 m/s from A to B in straight line AB. Thevelocity of particle at A and B are 5 m/s and 15 m/s respectively. The velocity at mid-point of AB is69 V125 m/s (2) 250 m/s(3) V550 m/s (4) V600 m/sThe initial velocity of particle is y me-1 lat - |
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Answer» ANSWER: me to do it? Thanks Explanation: |
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| 38. |
214. An initially stationary device lying on a frictionless floor explodes into two pieces and slides across the floor onepiece is moving in positive x direction then other piece is moving in(1) Positive y direction(2) Negative y direction(3) Negative x direction(4)At angle from x direction---- |
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Answer» Answer: |
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| 39. |
What is accuracy and what is precise? |
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Answer» Accuracy REFERS to the CLOSENESS of a MEASURED value to a standard or KNOWN value. Precision refers to the closeness of two or more MEASUREMENTS to each other. |
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| 40. |
A particle is thrown vertically up with initial velocity 60 metres per second the distance covered by the particle in first 2 seconds of the decent will be take G is equal to 10 metre per second |
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Answer» The CORRECT answer is 35 as PER my CALCULATIONS. |
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| 41. |
Activity#2 Test Mag...1, 2! In Grade 10 science module (Answers) Q7. What conditions with observable effects make magnets interact with non-magnet materials? |
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Answer» Answer: The following is the conditions with observable effects which make magnet interact with non MAGNETIC material: The non magnetic material should have the ability to conduct magnetism. Magnets should be in a close PROXIMITY with the non magnetic material Explanation: The first conditions should MEET first. The non magnetic material should have the ability to conduct magnetism. These materials are also called FERROMAGNETIC. These materials have the ability to be magnets when inside the magnetic field of a magnet. Metallic materials mostly have this ability. Then follow by the second condition which is the magnet should be in close proximity with the non magnetic material. This for the non magnetic material to be within the range of the magnetic field of the magnets.
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| 42. |
Two masses 2m and m are whirled in a horizontal circle.the radius of path of 2m is r and m is 2r.the ratio of tension of two strings are |
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Answer» Answer: 4:1 Explanation: |
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| 43. |
Sound waves in air alwayslongitudinal because of the(a) Inherent characteristic of soundwave(b) Air does not have modulus ofrigidity.(c) Air is a mixture of several gases(d) Density of air is very small. |
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Answer» a) INHERENT CHARACTERISTICS of SOUND WAVE |
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| 44. |
What is the place. |
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Answer» Where?................. |
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| 45. |
what is a pressure acting at the bottom of a beaker if the weight of the water is 6N and area on which it is acting is 0.002m square? GIVE ME THE FULL PROCESS. |
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Answer» Answer: 3000 PASCAL Explanation: PRESSURE = FORCE / Area on which force is ACTING = 6 N / (0.002 m²) = 3000 N / m² = 3000 Pascal |
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| 46. |
What is the relation between speed frequency and wavelength of a wave? If a wave is travelling at 3 into 10 to the power 8 metre per second with the frequency of 10 to the power 6 hertz then what is its wavelength? |
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Answer» Answer: 3×10^8/10^6= 3×10^2=300m/s Explanation: LAMBDA =voccum/frequency. |
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| 47. |
We hear a shrilling sound by a flute. Why? |
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Answer» we dont hear a shrill SOUND from FLUTE we hear shrill sound from pungi flute is a very MELODIOUS instrument |
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| 48. |
Explain the working of Vacuum cleaner. On which mechanism it works. |
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Answer» Answer: It WORKS on the principle of FLOW of air from area of high pressure to area of LOW pressure. An electric motor is attached to a fan that spins it at high velocities. The FAST spinning fan creates a region of low pressure inside the SUCTION hose of the vacuum cleaner. |
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| 49. |
The force exerted on a surface which is in the from of a n equilateral triang triangle of side "a " is 9.169N. Find the pressure exerted on the surface |
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Answer» Explanation: 1 pascala |
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| 50. |
What is the pressure on a swimer 10m below the surface of a lake? |
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Answer» pressure=10×10×1+1atm |
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