Explore topic-wise InterviewSolutions in Current Affairs.

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.

According to the principle of method of mixture,the net heat lost by the hot bodies is equal to ----------- by the cold bodies. Choose the correct option from the bracket. ( 540 cal/g, 0°c, average kinatic energy, heat gained, humidity, )

Answer» TION:ANSWER is 540 cal/git it RIGHT
2.

The surrounding air becomes warm or cool when vapour phase of H2O condenss. explain?

Answer»

coolExplanation:when H2O is in vapour form, it makes the SURROUNDINGS WARM. But after it condenses ONTO the skin, it turns back to LIQUID form causing a COOLING effect.hope it helped and pls mark as brainliest:)

3.

IF you are chilly out side the shower state,why do u feel warm after the bath if you stay in the bathroom.

Answer»

when we are at out our body is cool. But when we ENTER our BATHROOM the temperature is more compared to our body. When we have a bath,the water CONDENSES on our body which is a heating PROCESS. So we FEEL warm.

4.

How do you appreciate the role of the higher specific heat of water in stabilizing atmospheric temperature during winter and summer season.

Answer»

The oceans behave like heat store houses for the earth. They absorb LARGE AMOUNT of heat from the sun at the equator without rise in temperature due to high specific heat capacity of water.So oceans moderate the surrounding temperature near equator by TRANSPORTING the heat away. This TRANSPORTED heat moderate the climates in parts of earth that are FAR away from equator.

5.

What role does specific heat ply an keeping a watermelon cool for a long time after removing it from a fridge on a hot day.

Answer»

Watermelon brought out from refrigerator RETAINS it's coldness for a larger time than any other fruit because it CONTAINS a large percentage of water which has high SPECIFIC heat.

6.

How much energy is released or obsorbedwhen 1gm of water at 0°cfreezes to ice at 0°.

Answer»

no energy is released because the energy is USED to change the STATE of matter [ from liquid to gas ].This type of heat is CALLED latent heat.hope it helps and pls mark as BRAINLIEST:)

7.

If kelvin scale = 273+sentigrade scale. convert20°c into kelvin scale ?

Answer» 20℃ = 20 + 273K = 293KExplanation:HOPE this will HELP U
8.

A body of mass m is moving with a uniform velocity 'u'. A force is applied on it due to which its velocity increases from u to v. How much work is done by the force? Give an expression or formula only.

Answer»

the WORK FORMULA is FORCE × DISPLACEMENT

9.

7. The acceleration of a cart started at t=0, varies with time as shown in figure (3-E2). Find the distancetravelled in 30 seconds and draw the position-time graph.​

Answer»

lear from the graph that the cart has uniform acceleration of 5 ft/s² for initial 10 s then uniform velocity for next 10 s (because acceleration is zero) and then RETARDATION in further next 10 s. Area between graph and TIME axis gives the change in velocity in the taken time interval Let us consider three parts of each 10 s. In the first 10 s change of velocity = 5 ft/s² x 10 s = 50 ft/s, Since the cart starts from rest at t=0, average velocity in this period = (50+0)/2 =25 ft/s, Distance travelled in this 10 s =25 ft/s x 10 s =250 ft. From t=10 s to 20 s area under the graph is zero, so change in velocity is zero, it means that the velocity at t= 10 s (50 ft/s) remains unchanged. So distance travelled in this period = 50 ft/s x 10 s = 500 ft. From t=20 s to 30 s area under the graph = 5 ft/s² x 10 s = 50 ft/s but it is below the time axis, So this change of velocity is negative. It means that the cart moving with a velocity of 50 ft/s at t= 20 s comes to rest at t=30 s. So average velocity in this period = 25 ft/s and distance travelled = 25 ft/s x 10 s = 250 ft. So the distance travelled = 250 ft + 500 ft+ 250 ft = 1000 ft.Read more on Sarthaks.com - https://www.sarthaks.com/41444/the-acceleration-of-a-cart-started-at-t-0-varies-with-time-as-shown-in-figure-3-e2

10.

a body of mass 1 kg changes its temperature from 25 degree Celsius to 30 degree Celsius when 4,000 joules of energy is supplied to it what is the specific heat of the body​

Answer»

800Explanation:E=mcd(t)=>4000=1×c×5=>c=800

11.

An electron moving through a magnetic field does not experience any force.Under what condition is this possible?

Answer»

hat condition an ELECTRON moving through a magnetic FIELD experiences the maximum force ? Answer: Force is maximum when SIN θ=1 or θ=90o, that is, when electron is moving perpendicular to the direction of magnetic field.

12.

If vector A and vector B are two vectors such that their resultant is perpendicular to vector A and in magnitude equal to A. Then the magnitude of vector B will be​

Answer»

nitude of VECTOR B is equal to that of vector A vector B is also in the opposite direction to that of Ai.e. A=-Bhope it helps you and if it does then PLEASE mark it as the BRAINLIEST answer

13.

An empty oil drum weighs 58kg. If its height is 1.4m and radius 0.5m, find its mass when filled with oil of density 0.9g/cm^3​

Answer»

58kgfrom RADIUS and HEIGHT volume=1.1m^3 ASSUMING it to be. cylinderso now density =58/1.1=around 58density of oil=0.9and VOL. of cylinder =1.1 so mass=density*vol.=0.9*1100000so ans. 990000 g= 990kgplz mark as brainliest ..

14.

the square of the resultant of two forces 4 N and 3 N exceeds the square of the resultant of two forces by 12 then they are mutually perpendicular the angle between the vectors is​

Answer» INCOMPLETE QUESTION BRDR
15.

Can unbalanced Force move a body at rest​

Answer» UNBALANCED force can CHANGE:-1)SPEED2)shapeof an OBJECT.when the object is moving and the forces are unbalanced so it can slow down the object to rest.
16.

Pls answer the above qestion​

Answer»

which one I have to ANSWER???PLZ. select the question no. nd CLICK the picture CLEARLY

17.

Which company makes pubg​

Answer» E MAKES PUBG.......
18.

We know that sound is a form of energy. So, the large amount of energy produced due the sound pollution in cosmopolitan cities can be used to our day to day needs of energy. It also helps us to protect bio diversity in urban areas'. Do you agree with this statement? Explain.

Answer»

r,# Answer with explaination - YES, off course. Obtaining energy from sound produced in the environment is an INNOVATIVE idea. That may help solve energy crisis as well as can dispose lot of unwanted sounds in surroundings. But practically, this is hard to get by. First of all, currently there's no technology that can convert such large amount of sound energy into electrical energy. Next, the sound pollution is so widely diffused so it's difficult to CONCENTRATE all sound at particular device. And even if we succeed all that, COST of technology implented WOULD be very much high relative to electrical energy obtained.Hope that helps you...

19.

Question 3. Pls tell the answer and explain

Answer»

very very hardExplanation:which CLASS you AREI will SOLVE this and TELL you

20.

A certain sound wave in air speed 140s and wavelength 1.7 m for thiswave calculate a) the frequency b)the period​

Answer» GIVEN: wave length = 1.7m TIME taken= 140sso, frequency= c/lambdac=3×10^8, lambda = wavelenght =1.7mfrequency = 3×10^8/1.7frequency = 1.8×10^8 HERTZ. time period :from frequency FORMULA frequency= 1/time period time period = 1/frequency as, frequency = 1.8×10^8time period = 1/(1.8×10^8) time period = 0.6×10^-8sHOPE THE ANSWER IS CLEAR....
21.

Distance,S (cm)Timet(s)12S/t.Averagetime​

Answer» TION:AVERAGE time=total time/distance PLEASE MARK it as BRAINLIEST
22.

13. In a group reactivity of metals increases while those of non metals decreases. Explain​

Answer»

because in metals, as we GO down, size increases i.e, it becomes farther from the nucleus HENCE, it becomes easier to lose an electron. But in non metals as the size increases, it becomes AWAY from the nucleus and the nucleus has not much control on the valence SHELL. Hence, it is difficult to accept an electron. Hence,In a group reactivity of metals increases while those of non metals decreases.

23.

Pls tell the answere of questions 1&2 2 ke all part

Answer» PLEASE SEND the IMAGE STRAIGHT WAY
24.

what is the whole universe depending on ,what is the main thing that keep the universe intact and does not pull or push galaxies far or near other than gravity and centrifugal force​

Answer»

all around US in the SPACE or in other planets that BALANCE out other FORCES or be UNBALANCED

25.

'A 'B'a. Neutronsi. six electronsb. p-orbitalii.-1.6x10-1°Cc. charge on electron iii. Ultravioletregiond. Lyman series iv. Chadwick​

Answer»

neutons-chadwickp-orbital-six ELECTRONS CHARGE on electron- (-1.6×10^-19 C)lyman series -uv REGION

26.

A) Define average speed. (b) A bus travels a distance of 120 km with a speed of 40 km/h and returns with a speed of 30 km/h. Calculate the average speed for the entire journey.

Answer»

The average speed of an object tells you the (average) rate at which it covers DISTANCE. If a CAR's average speed is 65 miles per hour, this means that the car's position will change (on the average) by 65 miles each hour.

27.

Hlo everyone .......................... what is the light equation​

Answer» HII..... Formula: C = f where: c = the speed of light = 300,000 km/s or 3.0 x 108 m/s. = the WAVELENGTH of light, usually measured in METERS or Ångströms (1 Å = 10-10 m) f = the frequency at which light waves pass by, measured in units of per SECONDS (1/s).HOPE IT HELPS YOU BUDDY..... @dhruvchaudhary38
28.

If y=x² sin x, then the value ofdy/dx is​

Answer»

the ANSWER is 2X cosxExplanation:as dy/dx SIN X= COS x

29.

Let us assume that you have lifted a suitcase and kept it on a table. On which of the following does the work done by you depend or not depend? Why? a) The path taken by the suitcase. b) The time taken by you in doing so.c) The weight of the suitcase. d) Your weight.

Answer»

answer:the PATH taken by the suitcase HOPE this answer HELP you........

30.

In which of the following cases is the work done positive or zero or negative? a) Work done by the porter on a suitcase in lifting it from the platform on to his head.b) Work done by the force of gravity on suitcase as the suitcase falls from porter’s head.c) Work done by the porter standing on platform with suitcase on his head.d) Work done by force of gravity on a ball thrown up vertically up into the sky.e) Work done by force applied by hands of a man swimming in a pond.

Answer» COD the RIGHT ANSWER 124455
31.

Identify the wrong statement among the following. Rewrite them by making necessary corrections. a) Work and energy have different units.b) When an aeroplane takes off, the work done by its weight is positive.c) The potential energy of spring increases when it is extended and decreases when it is compressed.d) If the work done by external forces on a system is negative then the energy of the system decreases.e) When a body is falling freely from a height, its kinetic energy remains constant.f) The unit of power is watt.

Answer»

and energy have same units that is Joule.b) work done is negative.c)The potential energy of SPRING decrease when it is extended, and INCREASE when it is compressed.e)its KINETIC energy increases due to increase in velocity.d)and f)are right.hope it HELPS you.

32.

How do you appreciate Archimedes discovery of force of buoyancy

Answer»

yes they Discovery of wine SEE by our family should be appreciated by doing this Discovery he hadn't upgrade achievement to explain the breast given by a fluid and the concept behind flight of a HOT AIR balloon and the science behind when the boat remains up or above the WATER or when the boat will SINK under the water

33.

Explain why atomic number is more important than atomic weight in determining chemical properties ​

Answer»

in NATURE we find many isotopes of the elements they have different atomic number but same atomic masswe DEFINE atomic mass by taking the average of the atomic MASSES of the isotopes,so that VALUES are approximate value we can't CONSIDER them as definitehencewe consider the atomic number

34.

Please explain this image

Answer»

p=hdgExplanation: LET us consider HEIGHT be h,density of water be d, and cross-sectional AREA a P=F/A P=m×a/a P=v×d×g/a P=a×h×d×g/a so, P=hdg HOPE you GOT helped... plz mark me as BRAINLIEST...

35.

Please answer fast everyone please fast ​

Answer» TION:FIRST FOLLOW me okkkkkk
36.

A particle moves along a circular path of radius R. The distance and displacement of the particle after one complete revolution is(1) 0,214(2) 2ter, o(3) O, ter(4) nr, oArtistun lonth​

Answer»

distance=2πRdisplacement=0hope it HELPS:)

37.

Which instrument is used to measure hight of planets? .... Don't spam..​

Answer»

sextantA sextant is a doubly REFLECTING navigation instrument that measures the angular DISTANCE between two visible objects. The PRIMARY use of a sextant is to measure the ANGLE between an astronomical object and the horizon for the PURPOSES of celestial navigation.HOPE IT HELPS YOU BUDDY..... @dhruvchaudhary38

38.

Using a piece of printed paper how will you differentiate between a concave lens and a convex lens

Answer»

s IMAGE it MIGHT HELP you my FRIEND

39.

What is the ossilating frequency of a crystal ossilator​

Answer»

here is your ANSWER:EXPLANATION: HOPE it HELPS... ☺

40.

Where does the center of gravity lie, when a boy is doing sit-ups? Does weight vector pass through the base or move away from the base? Explain.

Answer»

When a BOY is doing sit-ups, the center of GRAVITY KEEPS moving up and down. Thus the centre of gravity is not fixed while doing sit-ups. It keeps changing as the boy stands up or sits down.The weight vector passes through the BASE but it also keeps moving slightly.Hope this answer is HELPFUL to you. Thank you.

41.

An apple falls from a tree. An insect in the apple finds that the earth is falling towards it with an acceleration g. Who exerts the force needed to accelerate the earth with this acceleration?

Answer»

the insectExplanation:Since the earth is not actually moving towards the APPLE, it is the insect which is assuming it.The insect views the earth's acceleration as g towards it as the apple is moving with acceleration ghope it HELPS and PLS MARK as brainliest:)

42.

Does newton first law define inertia​

Answer» TION:YES newton first LAW define INERTIA
43.

20% of the main current passes through the galvanometer. If the resistance of the galvanometeris G, then the resistance of the shunt will be -​

Answer»

20% CURRENT is FLOWING through the GALVANOMETER it means 80% current is flowing through the shunt resistance. THEREFORE shunt resistance must be G/5

44.

Hey mates I will mark u as brainliest plz answer this... A cyclist is riding with a speed of 27 km/h. As heapproaches a circular turn on the road of radius 80 m, heapplies brakes and reduces his speed at the constant rate of0.5 m/s2. What is the magnitude and direction of the netacceleration of the cyclist on the circular turn?​

Answer»

tion:0.86 m/s2; 54.46° with the direction of velocitySpeed of the cyclist, v = 27 km/h = 7.5 m/sRadius of the CIRCULAR turn, r = 80 mCentripetal acceleration is given as:ac = v2 / r= (7.5)2 / 80 = 0.7 ms-2Suppose the cyclist begins CYCLING from POINT P and moves toward point Q. At point Q, he applies the breaks and decelerates the speed of the bicycle by 0.5 m/s2.This acceleration is ALONG the TANGENT at Q and opposite to the direction of motion of the cyclist.Since the angle between ac and aT is 900, the resultant acceleration a is given by:a = (ac2 + aT2)1/2= ( (0.7)2 + (0.5)2 )1/2= (0.74)1/2 = 0.86 ms-2tan θ = ac / aTwhere θ is the angle of the resultant with the direction of velocity.tan θ = 0.7 / 0.5 = 1.4θ = tan-1 (1.4) = 54.560 hope my answer helped you!plz mark this answer as brainliest!

45.

velocity of point A on the rod is 2m/s at instant. the velocity of the B on the rod at this instant is​

Answer»

the VELOCITY of the B on the ROD is ALSO 2m/s

46.

A body of mass m is projected with initial speed u at an angle with the horizontal. The change in momentum of body after time t is(1) mu sine(2) 2musino(3) mgt(4) Zero​

Answer»

mgtExplanation:ASSUME the ANGLE to be θat initial point that is at lowest point 'u' will have two components one is usinθ(vertical) and other one is ucosθ (HORIZONTAL)at any instant i.e 't' vertical component will be= usinθ-gt and horizontal componenet will remain unchanged =ucosθ (as there is no acceleration in that direction)initial linear P = musinθj+mucosθifinal P(at any instant)=mucosθ+mu(sinθ-gt)jΔP=final P - initial P hence we'll get -mgtjIΔPI=mgt

47.

When does refraction occur​

Answer»

tion:We have learned that refraction occurs as LIGHT passes across the boundary between two media. Refraction is merely one of several POSSIBLE boundary BEHAVIORS by which a light wave could behave when it encounters a NEW medium or an obstacle in its PATH.

48.

How to calculate momentum of two bodies

Answer» MOMENTUM= mass×velocity(OR)P=m.vhope it HELPS and PLS MARK as BRAINLIEST:)
49.

White sunlight is not dispersed in air. Why?​

Answer»

tion:When WHITE SUNLIGHT FALLS in the atmosphere, lights with longer wavelength are not scattered by the air molecules. It is only the blue light which has shorter wavelength that is scattered most by the air molecules in the atmosphere. This is why the SKY looks blue.

50.

A convex mirror and a concave mirror each of focal length fare placed coaxially. They are separated by 4f and their reflecting surfaces face each other. A point object is kept on theprinciple axis at a distance x from the concave mirror such that final image after tworeflections, first on the concave mirror, is on the object itself. Find x in terms of f.​

Answer» TION:elite GROUP chat with a new ONE of the