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.

Classify each of the following on the basis of their atomicity1) f22)no23)n2o4)c2h65)p46)h2o2

Answer»

Having 2-1
Having 3-2,3
Having 4-3,5
Having 6-4

2.

Two insulated charged copper spheres A and B of identical size have charges q and 3q respectively.when they are brought in contact and then separated,what are the new charges on them?

Answer»

The answer is 2Q each.
When the 2 spheres COMES in CONTACT with each other, the charges are DISTRIBUTED equally to both the spheres.

3.

What would be the amount of work done on an object by a force , if the displacement of th object is zero

Answer»

the amount of work is DIRECTLY PROPORTIONAL to the magnitude of DISPLACEMENT

so, if displacement is ZERO, the amount of work will also be zero


4.

The unit of (momentum)²/mass is-Newton,watt,joule or Pascal?

Answer»

-------------------HEY DEAR------------------

HERE IS YOUR ANSWER................

WE KNOW,

(MOMENTUM )^2 = (MV)^2

SO, DIVIDE IT BY MASS

ITS BECOME  :  M(V)^2

          UNITS OF MASS = Kg.

         UNITS OF VELOCITY = m/sec

SO UNITS OF M(V)^2 = kg.m^2 / sec^2......................(1.)

KINETIC ENERGY = 1/2 M (V)^2

            HERE 1/2 IS CONSTANT

SO UNITS OF KINETIC ENERGY = kg.m^2 / sec^2

                                                        = JOULE

COMPARE IT WITH ONE

YOU WILL FIND THAT ITS UNITS ARE SAME

HENCE ,

JOULE IS THE ANSWER...................

*******************************************************

HOPE IT HELPS YOU..

THANKS

&&&&&&&&&&&&&&&&&&&&&&&&&&

MARK ME BRAINLIEST PLEASE...

                                     

5.

Calculate the time period of pendulum if it takes 30 sec to complete 20 oscillations

Answer»

30/20 = 3/2 SEC ....

6.

A small bottle weighs 20g when empty and 22g when filled with water.When it is filled with oil it weighs 21.76g.What is density of oil?

Answer» DENSITY =mass/volume
density = 22/21.76
7.

Nichrome is not used as fuse wire.give reason

Answer» HOPE this HELPS you ✌️✌️
8.

A boy has been playing games in mobile phones and is suffering from eye defect .The doctor prescribed him to use spectacles of power -5D .wha teye defect is he suffering from????pls frnds find quickly

Answer»

He is SUFFERING from MYOPIA

9.

Guys help me...qn 19....

Answer» SORRY o can't anslwe
10.

The isentropic heat drop in the nozzle of an impulse steam turbine with a nozzle efficiency 0.9, blade velocity ratio 0.5, and mean blade velocity 150 m/s in kj/kg is

Answer»

The ISENTROPIC heat DROP in the NOZZLE of an IMPULSE steam turbine with a nozzle efficiency 0.9, blade velocity ratio 0.5, and mean blade velocity 150 m/s in kJ/kg ...

11.

two bodies a and b of same masses moving with velocities v2 respestively then the ratio of their inertia is

Answer»

The RATIO of their INERTIA is 1:1 as their MASSES are same and inertia DEPENDS only on MASS.

12.

The speed of boat in still water is 8kmph. If it can travel 1 km upstream in 1 hr, what time it would take to travel the same distance downstream

Answer»

It will TAKE 30 MIN to TRAVEL down FALL

13.

The speed of a boat in still water is 4 km/h and the speed of current is 2 km/h. If the time taken to reach a certain distance upstream is 9 hours, the time it will take to go the same distance downstream is

Answer»

It will TAKE 3 hours to go the same distance DOWNSTREAM.

14.

Explain why the sun appears reddish at the sun-rise and the sun-set? 2-marks.

Answer»

---------------HEY DEAR----------------------

              HERE IS YOUR ANSWER..........

******************************************************************************

=> During sunrise and sunset, the rays have to travel a larger part of the atmosphere because they are very close to the horizon. Therefore, light other than red is mostly scattered away. Most of the red light, which is the least scattered, enters our eyes. Hence, the SUN and the sky appear red.

*****************************************************************************

HOPE IT HELPS YOU...

THANKS..

&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&

MARK ME BRAINLIEST PLZ......

15.

Hey guyssss,....Uses of gypsum...pls list them

Answer» HEY! Mate Here is your answer Answe Gypsum uses include: MANUFACTURE of WALLBOARD, cement, plaster of Paris, soil CONDITIONING, a hardening retarder in portland cement. Varieties of gypsum known as "satin SPAR" and "alabaster" are used for a variety of ornamental purposes; however, their low hardness limits their durability.

r:
16.

Identify and state the type of energy change in burning of crackers

Answer» CHEMICAL ENERGY to SOUND and LIGHT energy
17.

Explain why the sun appears reddish at the sun-rise and the sun-set?2-marks

Answer»

---------------HEY DEAR-------------------

HERE IS YOUR ANSWER........

=> During SUNRISE and sunset, the rays have to travel a larger part of the atmosphere because they are very close to the horizon. Therefore, light other than red is mostly scattered AWAY. Most of the red light, which is the least scattered, ENTERS our eyes. Hence, the sun and the SKY appear red.

***************************************************************

HOPE IT HELPS YOU..

THANKS..

**************************************************************

MARK ME BRAINLIEST PLEASE...

18.

What is the radius of a length 628m

Answer» WRONG QUESTION PLZ CHECK it
19.

A cube of side 0.4m rests on the floor as shown given that the cube has a mass of 200kg the pressure exerted by the cube on the floor is ( take g = 10 N kg)

Answer»

Side length of CUBE = 0.4 m
so, surface area of cube = side length²
= 0.4 × 0.4 = 0.16 m²

mass of cube = 200 kg
so, weight of cube = Mass of cube × G
= 200kg × 10 m/s² = 2000 N

now, pressure = weight/surface area of cube
= 2000/0.16
= 2000 × 100/16
= 2000 × 25/4
= 500 × 25
= 12500 N/m²

20.

Why magnetic field line not intersect each other explain with experim

Answer»

Magnetic  field  does not  intersect each  other because  if a Compus is placed  at the  POINT  of intersection  the  needle  have  to  SHOW  TWO  direction  , it is  impossible.

21.

Write three uses of petroleum

Answer»

Transportation
lubricant
industrial power
heating and LIGHTNING
these are the USES of PETROLEUM.... hope it helps you.... mark as brillianist

22.

What do you understand by uniform and non -uniform speed

Answer»

Uniform speed : If the OBJECT cover equal distance in equal interval of TIME.

Non uniform speed : If the speed of a BODY CHANGES w.r.t. time

23.

What is the formula of rest and motion

Answer»

V=u +at
v^2= u^2+2as
s=ut+1/2at^2

24.

Which type of reflection is used in endoscopy?

Answer»

TOTAL INTERNAL REFLECTION

25.

Find the LCM of 120 and 560

Answer» LCM of 120=2*2*3*5*2 and lcm of 560=2*2*2*2*2*5*7
26.

Energy stored in coil of inductance 50 mh and current 2A

Answer»

What is QUESTION U are ASKING

27.

The ratio of maximum shear stress to average shear stress of a circular beam is

Answer»

If a circular SHAFT is SUBJECTED to a TORQUE T and a bendingmoment 'M' the RATIO of the maximum SHEAR stress to the maximum bendingstress is given by : A.

hope helps you ❤️❤️

28.

A ray of light makes an angle of 50° with the surface s1 of glass slab then it's angle of incidence will be_______

Answer» ANSWER is

ANGLE of INCIDENCE is 40
29.

What is the relationship among refraction index ,real depth and apparent depth

Answer»

When a ray of light moves from one MEDIUM to another there is a CHANGE in velocity and direction of ray due to refraction which RESULTS in false APPEARANCE of depth of the material. The actual depth that a transparent medium has is known as real depth. Note − Real depth is always greater than apparent depth.

30.

A bomb of mass 12kg explodes into two pieces of masses 4 kg and 8 kg. The velocity of 8 kg mass is 6m/s. The kinetic energy of other mass is

Answer»

USING conservation of momentum

We get

0=MV+ mv

MV= -mv

8x6 = -4 x v

Thus v= -12m/s


Then KE =mv^2/2

KE = 4* (12)^2 /2

Then KE = 144*2

Thus KE = 288J

31.

What do you mean by clockwise and anticlockwise moment

Answer»

HEY,

The FORCE which make the horizontal BEAM turn down to the right, in the direction the CLOCK hands would move, are LABELLED clockwise moment.

The FORCES which would make the beam turn in the opposite direction are labelled anticlockwise moment.

THx.

32.

how many resistors of 9 ohm can be connected in parallel to a 12 V battery to carry a maxium of 4A current ?

Answer»

The ANSWER is 3


SEE the ATTACHED PIC

33.

Why we see rainbow colours on a different size of various shapes but why not in a equal sides figuted

Answer»

It depends on the angle of the sunlight PASSING through the raindrops. Rainbows are basically ROUND but OFTEN seen only half of the CIRCLE.

HOPE this helps

34.

Shrishti is walking at 1.63 m/s.if she weighs 583N ,what is the magnitude of her momentum..?

Answer»

95.025.pls MARK it is as BRAINLIEST.

35.

Examples for like charges repel each other and unlike charges attract each other

Answer»

The exam ple is a MAGNET .
in this same poles are repal each other and UNLIKE poles ATTRACT each other.

36.

Length, mass, speed, temperature odd man out

Answer»

It can be


1-Speed

This is because the OTHERS are fundamental units WHEREAS speed is a DERIVED unit


2-temperature

This is because the first 3 refer to kinematics whereas temperature is of THERMODYNAMICS

37.

What is unaccelerating constant velocity motion called

Answer» UNIFORM MOTION.......
38.

5 example of zero work done???

Answer»

▶️Work is zero if applied FORCE is zero (W=0 if F=0): If a block is MOVING on a smooth horizontal surface (frictionless), no work will be done.

▶️▶️Work done is zero when displacement is zero. This happens when a man pushes a wall. There is no displacement of the wall. Thus, there is no work done.

▶️▶️▶️When a porter carrying some LOAD on his
head moves on a horizontal platform, q = 90°,
therefore the work done by the porter is zero.

▶️▶️▶️▶️ For a body moving in a CIRCULAR path, the
centripetal force and displacement are
PERPENDICULAR to each other. So the work done
by the centripetal force is zero.

▶️▶️▶️▶️▶️man having some load on his head and standing for a while.

39.

.i want soln of this question pls REPLY

Answer» HOPE it HELPS U .....
40.

Explain stress and strain curve

Answer»

Stress strain curve is a behavior of material when it is subjected to load. ... As SHOWN below in the stress strain curve. From the diagram one can see the DIFFERENT mark points on the curve. It is because, when a DUCTILE material like mild steel is subjected to TENSILE test, then it passes various stages before fracture.

41.

What is focal length of plane mirror and mention the nature of image formed by plane mirror?

Answer»

Hey MATE here is your answer》》

Plane mirrors are the only type of mirror for which a real OBJECT always produces an IMAGE that is virtual, erect and of the same size as the object. Virtual objects produce real images, however. The focal length of a plane mirror is infinity; its optical power is zero.

Because in plane mirror,the distance of object "a" from the mirror and the distance from image “b” to the mirror are equal.

so by using formula,

1/f=1/a+1/b

We get,

1/f=1/a -1/b (bcz p=q)and (b is TAKEN as negative bcoz image of plane mirror is virtual.

so,

1/f=0,

f=1/0

and any thing divided by zero is infinity.

Hope this answer will help you..《《

42.

the maximum and minimum distance of earth from sun are r1 and r2 respectivally. what will be the distance of earth from sun when it si perpendicular to the principle axis passing through sun in its orbital

Answer»

Hey dear,

# Answer- l = 2 r1.r2/(r1+r2)

# Explaination-

For an elliptical orbit with ECCENTRICITY e, the position of a particle with perpendicular distance from FOCUS l is represented as,

r=1/(l+ecosθ)

The maximum distance is given by

r1=1/(l−e)

1−e=l/r1 (1)

The minimum distance is given by

r2=1/(l+e)

1+e=l/r2 (2)

ADDING (1)&(2),

2 = l/r1 + l/r2

2 = l [(r1+r2)/r1.r2]

l = 2 r1.r2/(r1+r2)

The distance when perpendicular to PRINCIPAL axis is given by 2 r1.r2/(r1+r2).

Thanks for ASKING.

43.

Name the two application of a pasxal law

Answer»

HYDRAULIC and SYRINGE

44.

I need answer for this question I will mark u as brainlist

Answer»

N2/v - n1/u = (n2 - n1)/R 

Here the RAY of light propagating from a RARER medium of refractive index (n1) to a denser medium of refractive index (n2), is incident on the convex side of spherical REFRACTING SURFACE of radius of curvature R. 

hope i will be marked as BRAINLIEST

45.

What is focal length of plane mirror and mention the nature of image formed by plane mirror

Answer»

Plane mirrors are the only type ofmirror for which a real object ALWAYS produces an IMAGE that is virtual, erect and of the same size as the object. Virtual objects produce real images, HOWEVER. Thefocal LENGTH of a plane mirror is INFINITY; its optical power is zero.

46.

Semi transparent definition

Answer»

It means.
partially or IMPERFECTLY transparent
example:
the CUTICLE of MITES or SPIDERS are SEMI transparent

47.

Fuse wire are not used as connecting wire in a circuit

Answer»

Yes fuse wires can't be used as CONNECTING wires because it has RESISTANCE which make it HOT

48.

There is a small air bubble inside a glass sphere (µ = 1.5) of radius 10 cm. The bubble is 4 cm below the surface and is viewed normally from outside. The apparent depth of the bubble is

Answer»

ANSWER:

The bubble will appear 3.03 cm below the surface.

Explanation:

GIVEN that,

Refractive INDEX \mu_{1}=1.5

Refractive index \mu_{2}=1

Radius = -10 cm

The bubble is 4 cm below the surface and is viewed normally from outside.

u= -4 cm

Using formula of refractive index

\dfrac{\mu_{2}}{v}-\dfrac{\mu_{1}}{u}=\dfrac{\mu_{2}-\mu_{1}}{R}

\dfrac{1}{v}-\dfrac{1.5}{-4}=\dfrac{1-1.5}{-10}

\dfrac{1}{v}= \dfrac{0.5}{10}-\dfrac{1.5}{4}

v= -3.03\ cm

Hence, The bubble will appear 3.03 cm below the surface.

49.

Specific gravity for most of the building stones lies between a) 1.5 to 2.0 b) 2.0 to 2.5 c) 2.5 to 3.0 d) 3.0 to 3.5

Answer» THINK ANSWER is 2.0 to 2.5 THANK you MARK my answer as BRAINLIST answer
50.

Should a copper wire be used as fuel wire.Explain why.

Answer»

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