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.

Can we ask about anything like Games???

Answer» YES ANYTHING you can ASK
2.

Pragya makes a saturated solution of potassium chloride in water at 373 K and leaves the solution to cool at roomtemperature. What would she observe as the solutioncools? Explain.​

Answer»

Crystals of KCl will be observed on the edges of the beaker.Explanation:As temperature increases the solubility of a solution increases as the intermolecular distance between solvent particles decreases. So more ions can be accommodated b/w  the water molecules. Now when temperature decreases the particles MOVE back closer together due to loss of thermal energy, which causes the distance between the molecules to DECREASE a lot.When this happens the particles move closer and the solubility decreases. So the excess KCl which dissolved at 373K will now be FORCEFULLY pushed out of the solution. For relation between the temperature and solubility REFER the 12th grade ncert textbook (Chemistry part 1- Chapter solutions) Hope you understood my answer.Please leave a thanks.

3.

5. Define electric resistance of a conductor​

Answer»

conductors are the things or MATERIALS which are good CONDUCTOR of electricity for example METALS WROUGHT ironhope it helps you ☺️

4.

Name the principle on which an optical fibre works.

Answer» OPTICAL fibres works on the PRINCIPLE of TOTAL INTERNAL REFLECTION, by this method signals can travel with very LESS LOSS of energy.
5.

A convex lens is placed in contact with a plane mirror. A point object at a distance of 20 cm on the axis of this combination has its image coinciding with itself. What is the focal length of the lens? [Delhi 2014]

Answer»

shows a convex lens placed in contact with a plane mirror. An AXIAL point object is placed at a DISTANCE O at a distance, OC = 20cm. As the image I of the object coincides with O, the RAYS refracted first from the lens and then refracted by the plane mirror must be retracing their path. This would happen when rays refracted by the convex lens fall normally on the mirror I.e, the refracted rays FORM a beam parallel to principal axis of the lens. Hence the object O must be at the focus of the convex lens. f = CO = 20 cm.solution

6.

Does the magnifying power of a microscope depend on the colour of the light used? Justify your answer. [Foreign 2017]

Answer»

yes it DEPENDS on the colour.Explanation:friends I'm new to this app so how to ask my second question PLZ REPLY it FASTER.

7.

An object is first seen in red light and then in violet light through a simple microscope. In which case is the magnifying power larger?

Answer»

the colour for red.Explanation:Because, it has more wavelength.friends I'm NEW to this APP so how to ask my SECOND question PLZ reply it FASTER.

8.

Why is there no dispersion in the light refracted through a rectangular glass slab?

Answer»

After REFRACTION at two parallel faces of a glass SLAB, a ray of light emerges in a direction parallel to the direction of incidence of WHITE light. As rays of all colours EMERGE in the same direction, i.e., the direction of the incidence of white light, there is no dispersion.

9.

A green light is incident from water to the air-water interface at the critical angle (θ). Which part of the spectrum will come out in the air medium?

Answer»

As frequency of visible LIGHT increases refractive index increases. With the increase of refractive index CRITICAL ANGLE decreases. So that light having frequency greater than green will get total internal reflection and the light having frequency less than green will PASS to air.

10.

If an object is moved from infinity to convex mirror, then in which direction will the image shift?

Answer»

In a CONVEX mirror, the image always MOVES towards the mirror (if the object is at INFINITY, then the image is FORMED at focus and if the object is at POLE then the image is formed at pole itself).

11.

Name the phenomenon due to which one cannot see through the fog. [DoE]

Answer» HEY mate here is your answer ❤️scattering of light:-The white light from the SUN is scattered by the water droplets due to fog. HENCE, we can't SEE through the fog. The phenomenon is scattering of light. The reason why we cannot see through fog is due scattering of incoming (VISIBLE) light by the suspended water droplets (in the fog), it looses its intensity.Mark me as brainlist ❤️ ❤️
12.

The line AB in the ray diagram represents a lens. State whether the lens is convex or concave.

Answer»

The LINE AB in the ray diagram represents a LENS State WHETHER the lens is convex or concave. We can see that the lens slightly diverges the path of refracted light. Hence, the lens is concave in NATURE.

13.

How do the increasing (i) wavelength and (ii) intensity of light affect the speed of light in glass?

Answer»

f light C is RELATED to frequency ν and wavelength λ that is GIVEN by, c = ν λ ..................(1) when we have light of given wavelength in air, its frequency is fixed as given by eqn.(1).When this light ENTERS glass, frquency will not change but its speed will decrease SINCE glass is optically denser medium compare to air.when speed of light decreases, correspondingly its wavelength decreases because frequency is constant.mark as brillienst answer

14.

Prime minister 2019​

Answer»

Shri Narendra modi jiExplanation:please please please please please MARK me as BRAINLIST hope it HELPS you.

15.

What is electrolysis? in physics ​

Answer»

This is your answer.MARK AS BRAINLIST.

16.

II. Define/Explain the following. 1. Force3. Contact forces2. Non-contact forces4. Fluid frictionPlz and the key words. Don't give long answers.​

Answer»

мє τσ τнє вαℓσr cℓυв___✳ Define/Explain the following.1. Force2. CONTACT forces3. Non-contact forces4. FLUID friction_______________________________=> To define the following :-Force :- Push or pull of an object is CONSIDERED a force. Push and pull come from the objects interacting with one another. In SI base units: kg·m/s2.F = m a____________________________Contact FORCES :- Contact force is a force that is applied by objects in contact with each other. Contact force acts on a point of DIRECT contact between the two objects. This force can either be continuous as a continuous force or can be momentary in the form of an impulse. It is of three types :-Frictional ForceApplied ForceNormal Force______________________________Non-contact forces :- A non-contact force is a force applied on an object by another body without being in direct contact with the object.Examples:-Gravitational forceGravitational forceElectromagnetic forceGravitational forceElectromagnetic forceStrong Nuclear forceGravitational forceElectromagnetic forceStrong Nuclear forceWeak Nuclear force_______________________________ Fluid friction :- Fluid friction is the resistance to an object's motion through a liquid or gas. When the motion is occurring in a liquid, it is referred to as viscous resistance. As an example, when an object falls through water, its speed reduces due to fluid friction acting on it.____________________________________Hope it help you ☺

17.

What is the capacitence(in F)of a spherical conductor of radius 2m?​

Answer» RADIUS of spherical conductor (R) = 2 mWe KNOW that , The CAPACITANCE of an isolated spherical conductor is given by Thus ,Hence , the capacitance of spherical conductor is 2.112 × (10)^-10 farad
18.

A parent pulls a toboggan with three children at a constant velocity for 38 m along a horizontal snow-covered trail. The total mass of the children and the toboggan is 66 kg. The force the parent exerts is 58 N [18° above the horizontal]. a)List three forces, or components of forces, that do zero work on the toboggan:

Answer»

According to my personal opinion the answer will be the vertical component of the force applied, the WEIGHT of the kids and TOBOGGAN and the normal reaction exerted by the GROUND on the toboggan and the kids.Explanation:Work done can be defined as:W=FscosθFrom here it is clear that if cos value is 0 then the work done will be zero.So the forces acting perpendicular to the direction of motion  will be doing zero work.From resolving the force of the parent into 2 components we see that the vertical component of force does no work as it is perpendicular to the direction of motion.Same thing APPLIES to the weight and normal reaction as well.As they too are perpendicular to the direction of motion.Hope you understood my answer and found it useful

19.

Give the history of transprt and how better modes of transports are envloved

Answer»

Humans' first means of transport involved walking, running and swimming. The domestication of animals introduced a new way to lay the burden of transport on more powerful creatures, allowing the hauling of heavier loads, or humans riding animals for greater speed and duration. Inventions such as the wheel and the sled helped make animal transport more efficient through the introduction of vehicles. Water transport, including ROWED and sailed vessels, dates back to time immemorial, and was the only efficient way to transport large quantities or over large distances prior to the Industrial Revolution.The first forms of road transport involved animals, such as horses (domesticated in the 4th or the 3rd millennium BCE), oxen (from about 8000 BCE)[1] or humans carrying goods over dirt tracks that often followed game trails. Many early civilizations, including those in Mesopotamia and the Indus Valley, constructed paved roads. In classical antiquity, the Persian and Roman empires built stone-paved roads to allow armies to travel quickly. Deep roadbeds of crushed stone underneath kept such roads dry. The medieval Caliphate later built tar-paved roads. The first watercraft were canoes cut out from tree trunks. Early water transport was accomplished with ships that were either rowed or used the wind for propulsion, or a combination of the two. The IMPORTANCE of water has led to most cities that grew up as sites for trading being located on rivers or on the sea-shore, often at the intersection of two bodies of water. Until the Industrial Revolution, transport remained slow and costly, and production and consumption gravitated as close to each other as feasible.The Industrial Revolution in the 19th century saw a number of inventions fundamentally change transport. With telegraphy, communication became instant and independent of the transport of physical objects. The invention of the steam engine, closely followed by its application in rail transport, made land transport independent of human or animal muscles. Both speed and capacity INCREASED, allowing specialization through manufacturing being located independently of natural resources. The 19th century also saw the development of the steam ship, which sped up global transport.With the development of the combustion engine and the automobile around 1900, road transport became more competitive again, and mechanical private transport originated. The first "modern" highways were constructed during the 19th century[citation needed] with macadam. Later, tarmac and CONCRETE became the dominant paving materials. In 1903 the Wright brothers demonstrated the first successful controllable airplane, and after World War I (1914–1918) aircraft became a fast way to transport people and express goods over long distances.[2]After World War II (1939–1945) the automobile and airlines took higher shares of transport, reducing rail and water to freight and short-haul passenger services.[3] Scientific spaceflight began in the 1950s, with rapid growth until the 1970s, when interest dwindled. In the 1950s the introduction of containerization gave massive efficiency gains in freight transport, fostering globalization.[4] International air travel became much more accessible in the 1960s with the commercialization of the jet engine. Along with the growth in AUTOMOBILES and motorways, rail and water transport declined in relative importance. After the introduction of the Shinkansen in Japan in 1964, high-speed rail in Asia and Europe started attracting passengers on long-haul routes away from the airlines.[3]Early in U.S. history,[when?] private joint-stock corporations owned most aqueducts, bridges, canals, railroads, roads, and tunnels. Most such transport infrastructure came under government control in the late 19th and early 20th centuries, culminating in the nationalization of inter-city passenger rail-service with the establishment of Amtrak. Recently,[when?] however, a movement to privatize roads and other infrastructure has gained some[quantify] ground and adherents

20.

Recording of sound on tapes was first invented by * 1 point (a) Poulsen (b) Fleming (c) Ampere (d) Lenz

Answer»

it's EDISON broExplanation:.......

21.

Calculate the speed of light coming from water to ice

Answer» HY dude ur answer is Explanation:Basically, you TAKE the max speed of light, which is 299,792,458km/s, and divide it by the refractive index of the material the photons need to travel through (bounce around through). WATER has a refractive index of 1.3 , so divide 300,000km/s by 1.3 and you get 230,000km/s.hope it helps uplz MARK me as brainlist
22.

For which material the value of refractive index is (i) minimum and (ii) maximum?

Answer»

The REFRACTIVE INDEX depends on the nature of the material of the medium and on the wavelength of the light used. Refractive index of (diamond 2.42) is maximum while the refractive index of air (air 1.0003) is minimum...Explanation: HOPE it HELPS youandplzz mark as brainliest answer plzzzzz....

23.

An air bubble is formed inside water. Does it act as a converging lens or a diverging lens? [DoE]

Answer»

It ACTS as a diverging lens.Explanation:Water is denser MEDIUM compared to AIR medium.so, when LIGHT rays MOVE from denser to rarer medium they diverge or move away from normal.Hence,it behaves as a diverging lens.Hope this helps you!!

24.

What do you mean by rotational motion

Answer»

When an OBJECT is carried in a MOTION at a certain ANGLE 'theta' is called as rotational motion. INSTA:@ALFA_THE_LEKHAK YOUTUBE :ALFA THE LEKHAK

25.

Can absolute value of refractive index of a medium be less than unity?

Answer»

No. absolute refractive INDEX less than unity INDICATES that SPEED of LIGHT in that medium is more than that in vacuum which is impossible.

26.

Blue colour of sky is due to phenomenon of _________ of sunlight.

Answer» SCATTERING or light.Explanation:
27.

A lens behaves as a converging lens in air and a diverging lens in water (μ = 4/3). What will be the condition on the value of refractive index (μ) of the material of the lens? [Delhi 2011C]

Answer»

Refractive INDEX of lens is GREATER than air but less than that of WATER.

28.

The splitting of white light into its constituent colours when it passes through a glass prism is called _________ .

Answer» TION:it is CALLED DISPERSION of LIGHT
29.

The image of an object formed by a lens on the screen is not in sharp focus. Suggest a method to get the clear focussing of the image on the screen without disturbing the position of the object, the lens or the screen.

Answer» TION:hope this will HELP you otherwise GO to my profile FOLLOW me and then I will
30.

A ray of monochromatic light passes from medium (1) to medium (2). If the angle of incidence in medium (1) is θ and the corresponding angle of refraction in medium (2) is θ/2, which of the two media is optically denser? Give reason. [Foreign 2013]

Answer»

e light ray passes from an optically lighter to denser medium, the light ra y  BENDS towards the normal to the interface at the point of incidence.  That means that the ANGLE of refraction is LESS in the denser medium.In the given example, medium 1  is the lighter one and medium2 is denser.==============The actual REASON for the bending of light ie., angle of refraction being smaller than angle of incidence is because of speed of light being less in a denser medium.  Light rays travel with less speed due to optical resistance faced.===formula wise,        μ₁ sin i  =   μ₂  sin r                               i  = x  >  r = x/2,  so    μ₂  > μ₁   so medium 1 is lighter as refractive index is less.   Refractive index of vacuum (lightest) is 1 and all other MEDIA have that more than 1.mark as brillienst answer

31.

A concave lens of refractive index 1.5 is immersed in a medium of refractive index 1.65. What is the nature of the lens? [Delhi 2015]

Answer»

The lens ACTS as a DIVERGING lens.Explanation:As it is moving from DENSER MEDIUM (1.65) to rarer medium (1.5)

32.

Optical fibre works on the principle of

Answer»

The optical fibre is a DEVICE which works on the principle of TOTAL INTERNAL reflection by which light SIGNALS can be transmitted from one place to another with a NEGLIGIBLE loss of energy.Explanation:

33.

Minimum angle of incidence in the denser medium for which angle of refraction becomes 90° is called _________ .

Answer»

CRITICAL ANGLEExplanation:When LIGHT TRAVELS from denser to rarer medium, the ANGLE of incidence at which angle of REFRACTION is 90 degree is called critical angle of incidence . ANSWER: crtical angle is the minimum angle of incidence for which the light gets refracted at 90 degree

34.

What is defination of momentum​

Answer»

the quantity of motion of a MOVING BODY, MEASURED as a product of its mass and velocity.formula:- p=mvpls mark me as brainiest ANSWER!!!;

35.

mr Sharma connected their domestic circuit to the direct supply from the electric pole of the area what can be the consequences faced by Sharma in future

Answer»

hiExplanation:

36.

What is electrolysis? explain the process of electroplating of a silver spoon by gold​

Answer»

f PERMANENTLY GETTING rid of hairs on the BODY by using an electric CURRENT

37.

Convert 5 hours into seconds​

Answer» 5 HOURS = 18000 SECONDS
38.

1 From the given Distance -time graph, find the speed of an object during the time interval of 10s to 20s​

Answer»

s your DISTANCE TIME GRAPH..

39.

The working principle of a washing machine is?? A) reverse osmosisB) diffusionC) centrifugationD) dialysis​

Answer» E YOUR ANSWER IS..C) CENTIFUGATION
40.

Hosting of a flag posses push or pull

Answer»

e!Here is your ANWER:It is a pull because you pull the rope.Hope I was able to HELP you!Stay HOME and stay safe!

41.

While climbing a staircase you find it difficult to climb the steps when the distance between two steps is high explain also suggest remedies to overcome this problem

Answer»

limbing a staircase we find it difficult to climb the steps when the DISTANCE between two steps is high ,because we have to lift up our body mass under the presence of gravity, and we have to OVERCOME the force of gravity. While climbing up the stairs we have to put force on ground, more then our weight, which put same force but in opposite, direction .we find it hard while climbing the two steps and the distance is high, then the remedy is we should try to climb the stairs by holding tightly on the POLES and we should take LITTLE rest and then walk. slowly.

42.

If the velocity of light be represented by unity and 100 second be the unit of time, what must be unit of length

Answer»

the VELOCITY of LIGHT is 3*10^8 m/s so the for the 100 SECOND UNIT of velocity is 3*10^8*100

43.

Convert 5 hours into second ​

Answer» TIME = 5*60 = 300 sec(in hour 60 SECONDS)
44.

Derive velocity time relation and position time relation for a uniformly accelerated motion by graphical method

Answer» EQUATION for Velocity-Time relation by graphical method: First equation of Motion. LET an object is moving with uniform acceleration. Let the object is moving with uniform acceleration, a. Draw a LINE parallel to x-axis DA from point, D from where object STARTS moving.
45.

A car is moving with at a constant speed of 60 km h-1 on a straight road. Looking at the rear view mirror, the driver finds that the car following him is at a distance of 100 m and is approaching with a speed of 5 km h-1. In order to keep track of the car in the rear, the driver begins to glance alternatively at the rear and side mirror of his car after every 2 s till the other car overtakes. If the two cars were maintaining their speeds, which of the following statement (s) is/are correct? [NCERT Exemplar] (a) The speed of the car in the rear is 65 km h-1. (b) In the side mirror the car in the rear would appear to approach with a speed of 5 km h-1 to the driver of the leading car. (c) In the rear view mirror the speed of the approaching car would appear to decrease as the distance between the cars decreases. (d) In the side mirror, the speed of the approaching car would appear to increase as the distance between the cars decreases.

Answer»

lutionThe speed of the car in the rear is.In the side mirror, the car in the rear WOULD appear to approach with a speed ofto the driver of the leading car.In the rear VIEW mirror, the speed of the approaching car would appear to DECREASE as the distance between the CARS decreases.In the side mirror, the speed of the approaching car would appear to increase as the distance between the cars decreases.Answer :DSOLUTION :As is known, in the side mirror, the speed of approaching car would appear to increase as the distance between the cars decreases. Choice (d) is correct.

46.

A ray of light incident at an angle θ on a refracting face of a prism emerges from the other face normally. If the angle of the prism is 5° and the prism is made of a material of refractive index 1.5, the angle of incidence is [NCERT Exemplar] (a) 7.5° (b) 5° (c) 15° (d) 2.5°

Answer»

I don't KNOW............................................

47.

Virtual image formed by convex mirror has magnification _________ .

Answer»

Convex mirror ALWAYS PRODUCES a image.So MAGNIFICATION is always less than one.

48.

An object approaches a convergent lens from the left of the lens with a uniform speed 5 m/s and stops at the focus. The image [NCERT Exemplar] (a) moves away from the lens with an uniform speed 5 m/s. (b) moves away from the lens with an uniform accleration. (c) moves away from the lens with a non-uniform acceleration. (d) moves towards the lens with a non-uniform acceleration.

Answer» OPTION CEXPLANATION:friends I'm new to this APP so how to ASK my second question PLZ reply it faster
49.

Optical denseness of a medium is measured in terms of _________ .

Answer» TRANSMITTANCE Explanation:optical DENSENESS of a medium is MEASURED in TERM of transmittance
50.

A magnifying glass is used, as the object to be viewed can be brought closer to the eye than the normal near point. This results in (a) a larger angle to be subtended by the object at the eye and hence viewed in greater detail. (b) the formation of a real inverted image. (c) increase in the field of view. (d) infinite magnification at the near point.

Answer» OPTION a is the FAMILIAR ANSWER because all other OPTIONS are the SUBSET of option a