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.

The angular velocity of a rickshaw wheel is 70rad s-1. the angular velocity of the wheel is

Answer»

the ANS is 70 rad/s

MENTIONED in the QUESTION itself


2.

a point on the rim of a rotating wheel 4 m in diameter has a velocity of 1600 cm/s. the angular velocity of the wheel is

Answer»

DIAMETER = 400cm

radius = 200 cm

ω = v/r

ω = 1600/200

ω = 8 rad/s

3.

A point on the wheel of 400cm diameter has a velocity of 1600cm/s the angular velocity of the wheel is

Answer»

DIAMETER = 400cm

radius = 200 cm

ω = v/r

ω = 1600/200

ω = 8 rad/s

4.

If u = -5 m s^-1 and v = 9 m s^-1 what is the magnitude of the horizontal wind speed

Answer»

If U and v signify the initial and final velocities of WIND

then MAGNITUDE of change in wind SPEED

= v - u

=9-(-5)

=14 m/s

5.

Momentum of a particle of mass m is p its kinetic energy will be

Answer»

k(kinetic ENERGY) = 1/2 mv^2

p=mv

what must we do to p to MAKE it 1/2 mv^2?

first, to get v^2, what if we do p^2

p^2=m^2 v^2

now that we have v^2, we need to do something to the REST of it.

to get m instesd of m^2,

p^2/m=mv^2

now we just have to DIVIDE the above by 2 to get 1/2 mv^2

hence, your answer: p^2 / 2m

Please mark brainliest, if it EXPLAINS everything to you.

thanks

6.

Why are carboxylic acid called weak acid

Answer» CARBOXYLIC ACID is called weak acid because they only partially DISSOCIATE into H+ cations and RCOO− anions in neutral AQUEOUS solution.
7.

Air when cooled down becomes lighter in weight is it true or false

Answer»

Air when COOLED becomes denser and becomes HEAVIER... So the ANSWER is false.

Hope it HELPS.

8.

Solenoid of length 10 cm and radius 1 cm contains 200 turns and carries a current of 10 ampere the value of pole strength of each pole is

Answer»

Answer: M = 2\pi Am

Explanation: The pole strength is the product of NUMBER of turns per UNIT LENGTH , AREA and current.

Given that,

Length l = 0.1 m

Radius r = 0.01 m

Number of turns per unit length n = \dfrac{N}{l} = \dfrac{200}{0.1}

Current in the solenoid i = 10 A

The pole strength is

M = nIA

M = \dfrac{200}{0.1}\times10 A\times \pi\times 0.01m\times0.01m

M = 2\pi Am

M = 2\pi AmHence, the pole strength is .

9.

Velocity of light in a medium is 1.5*10^8m/s its refractive index is

Answer»

If it is w.r.t to VACUUM then

REFRACTIVE index=SPEED of light in vacuum / speed of light in the media

Which is equal to 2

10.

A human heart beats 72 times per minute its frequency will be

Answer»

It FREQUENCY will be 1.25 PER SECONDS

11.

A particle moves with velocity function v(t) = -t2 + 5t - 3, with v measured in feet per second and t measured in seconds. Find the acceleration of the particle at time t = 3 seconds

Answer»

given V( t )= -t² +5t -3

differentiate both sides with respect to t

d( v) /dt =-2t + 5v

or d (v)/dt. when t =3 =-2(3) +5
acceleration. = -1
BCOZ RATE or change of velocity gives acceleration

12.

three bodies A, B and C are in thermal equilibrium. the temperature of A is 27 c,then the temperature of B is

Answer»

27 degrees centigrade.

According to the original and FIRST law of thermodynamics, any 2 bodies in thermal EQUILIBRIUM possess the same temperature. Bodies can be in equilibrium irrespective of whether they are in physical contact or are separated by a large distance. The only important fact is that heat ACCUMULATED in one body should TRANSFER to the other body or should be lost by either conduction, convection or radiation.

Since the above three bodies A, B and C are in equilibrium, they must possess the same temperature at all situations.

13.

Define irrigation. What is the necessity of irrigation?

Answer»

Giving the WATER to the crop in a PARTICULAR interval of a TIME is known as IRRIGATION...

Necessity of irrigation are...
1. due to irrigation the crop are more healthier.
2. WITHOUT irrigation crop doesn't grow.

14.

Give any two examples of torque in day to day life

Answer»

Hey mate,
Here are some EXAMPLES of torque used in day to day life:
1.The rotating force (torque) used when opening a bottle cap.The rotating force when using a wrench to TURN a lug nut (balance point is lug nut itself)
2.Even the SPIN/turn of the wheel of the car or the turn of a merry-go-round involves torque.
3.If torque didn't exist,we all would only be able to do things linearly,all in uniform line.There would be no turn,no spin,and no circle.Life would be so dull.
Torque really allows us to curve and have fun.It MAKES up a big part of our lives and we don't even know it!
Hope it will help you....
IF IT HELPS THEN PLZ PLZ PLZ MARK THIS ANSWER AS THE BRAINLIEST........PLEASE

15.

Why is gravity is so much weaker than the other forces?

Answer»
\bold \green{ \: hey \: mate}

the correct answer to your question is unsolved
\huge{ \: ya \: seriously \: unsolved \: it \: is \: still \: an \: unsolved \: mystery}

16.

Explain photoelectric effect

Answer»

Hi mate


The photoelectric effect is the EMISSION of ELECTRONS or other free carriers when light shines on a material. Electrons emitted in this MANNER can be called photo electrons


hope this HELPS you

mark me brainlist

17.

mass of moon is nearly 10% of the mass of earth what will be the gravitational force of the earth and the moon in comparison to the gravitational force of the moon on the earth

Answer»

Gravitational pull of moon is nearly 1/6 th of earth. It's numerical value is 1.63 m/s2 . Though it's mass is 10 '/, of earth but it's RADIUS is ALSO less and acceleration DUE to gravity is inversly PROPORTIONAL to square of distance from centre to surface of PLANET. So this explains why it's gravitational pull is 1/6th of earth.

HOPE IT HELPS!!!
PLEASE MARK AS BRAINLIEST!!!!!

18.

State kirchoffe law and apply it to derive wheatstone bridge principle

Answer»

Kirchoff's first law states that the algebraic sum of currents at a junction of an electric circuit is zero. ... Wheatstone Bridge is an ELECTRICAL circuit, which is USED for the accurate MEASUREMENT of the resistance of a conductor.

19.

Derive an expression for super elevation in highways.

Answer»

Answer:

v = SPEED in KMPH. R = Radius of the curve in metre. ∴ e = 0.201 – 0.15 = 0.051 per meter of carriage way. ∴ Super ELEVATION = 0.051 * 7 = 0.357 m or 35.7 cm above the inner edge of the road.

Hope it helps you.. :)

PLS mark me as BRAINLIEST

Explanation:

20.

Relation between wave velocity, frequency and wavelength

Answer»

The distance TRAVELLED by the WAVE in one second is called the wave velocity(V)
The number of VIBRATIONS made by the particle of the MEDIUM in one second,is called the frequency (f) of the wave.
The distance travelled by a wave in one period of vibration of the particle of the medium,is called the wavelength.

21.

The graph shows V-I graph of combination of resistors in parallel and in series. Which graph shows the combination of parallel resistors? Give reason.

Answer»

A is showing SERIES and B is showing parallel.

We KNOW R=V/I and SINCE slope of A is greater than that of B. Hence Resistance of A is more than that of B. And we know in series resistance is more than parallel. So A is series and B is parallel.

22.

Who invented gold leaf electroscope

Answer»

Hiii

William Gilbert invented the GOLD leaf electro SCOPE.

hope this HELPS you
please MARK as brainliest

23.

Distinguish between the Line of collimation and line of sight.

Answer»

Line Of SIGHT

The line which passes through the optical centre of the objective and the intersection of CROSS hairs.

Line Of Collimation

Since in LEVELLING the line of sight should remain horizontal while making the sight ; the line of sight when horizontal is called the line of collimation.

24.

A man is at distance of 6m from the bus the bus begins to move with a constant acceleration of 3 in order to catch the bus the minimum speed with which the man should run towards the bus is

Answer»

V^2=u^2+2as
v^2=0+2(3)6
v^2=36
v=+6or-6

25.

The initial velocity of a body of mass 10 kg moving in xy plane

Answer»

The other person has rightly responded. Here 1 m/s^2 need RECTIFICATION as the UNITS are of acceleration. Thanks.
this just EXAMPLE I hope this will help you

26.

When a car of mass 1200 kg is moving with a velocity of 15m/s on a rough horizontal surface?

Answer»

A car with a mass of 1,000 kg is moving with a velocity of 20 m/s. If on applying brakes, the car stops after coming to a distance of 50 m, what will be its retarding force?

The car stops after TRAVELING 50m. So, from the laws of MOTION,

V^2=U^2+2D(-a)

where V is the velocity at the end

U us its initial velocity

D is the distance traveled before coming to REST after applying retarding force

a us the acceleration but negative because retarding.

So

0=20^2–2*50*a

Or, 100a=400

So, a=4 ms^-2

Since the mass of the car is 1000 kg. So

F=m*a

=1000*4

=4000N

So the applied force is 4000 Newton's


this is just a example
I HOPE this will help you

27.

An object of mass 1 kg moving on a horizontal surface with initial velocity

Answer»

Answer1---v = u + at

v = 0

0 = 8 – g(10)

 = 8/100 = 0.08

To move the body withconstant velocity on this surface, INTERNAL force applied should be equal to friction force

F = mg

   = (0.08)(1)(10)

   = 0.8N

answer2---mass=1kginitial velocity`u`=8m/sfinal velocity`v`=0m/stime=10 sec.therefore, acceleration=v-u/t =0-8/10 =-0.8m/s^2Force=mass*acceleration =1*(-0.8) = -0.8NWe know that force cannot be in negative therefore, force applied =0.8N

I HOPE this will help you

28.

Velocity time graph for a body having uniform motion in area under v-t graph of uniform motion

Answer»

The TIME rate of CHANGE of the displacement in the BODY is called the velocity, The velocity is a vector quantity so it may be positive, negative or ZERO. For the uniform motion the velocity time graph is a straight line and for the non uniform motion the velocity time graph is a curve
I hope this will help you

29.

Explain,how geothermal energy is used to generate electricity.

Answer»

When the lake or river boil with the help of inner MAGMA this TURNS water into water vapour and it used in rotating the TURBINE which connected with GENERATOR this production of ELECTRICITY is known as geothermal electricity

30.

What are the functions of cathode and anode in a circuit? explain your answer..

Answer»

Cathode))))An anode is the ELECTRODE in a polarized ELECTRICAL device through which current FLOWS in from an outsidecircuit. CONVERSELY, a cathode is the eletrode in a polarized electrical device through which current flows out.
anode))))))The BASIC function of the cathode is to expel the electrons from the electrical circuit and focus them into a well-defined beam aimed at the anode. The typical cathode consists of a small coil of wire (a filament) recessed within a cup-shaped region



this is your answer

31.

Why we see white light as we all know that the velocity of all colours are different so they should enter in our eyes at different time?

Answer»

Visible light is the SMALL part within the ELECTROMAGNETIC spectrum that human eyes are sensitive to and can detect.

Visible light waves consist of different wavelengths. The colour of visible light depends on its wavelength. These wavelengths range from 700 nm at the red end of the spectrum to 400 nm at the violet end.




White light is ACTUALLY made of all of the colours of the rainbow because it contains all wavelengths, and it is described as polychromatic light. Light from a TORCH or the Sun is a good EXAMPLE of this.

Light from a laser is monochromatic, which means it only produces one colour. (Lasers are extremely dangerous and can cause permanent eye damage. Extreme care must be taken to ensure that light from a laser never enters someone’s eyes.)

this is your answer

32.

Suppose the acc due to gravity at the earths surface is 10 and at surface of mars is 4ms2

Answer»

The LINE C is the ANSWER

33.

Explain consolidation concept.

Answer»

This is your ANSWER I GIVE you the HUNDRED PERCENT garenty

34.

Answer is 1st option plzzz i will mark brainliest to genius

Answer» ANSWER is 1ST OPTION. YA you RIGHT
35.

Reversible heat engine converts one sixth of heat input into work. When the temperature of the sink is reduced by 62 C, its efficiency is doubled. Find the temperature of the source and the sink.

Answer»

HOPE this HELPS you

36.

why does a cricketer move his hands backwards while catching a moving cricket ball?( please fast answer)

Answer»

To REDUCE the FORCE OCCURRED by the BALL

37.

The direction of angular velocity isa. along the tangent drawn on a point b. along the radius towards the centre c. along the radius away from the centre d. along the axis of rotation

Answer»

Ing about a FIXED axis passing through its CENTER of GRAVITY C perpendicular to the ... angle of rotation by drawing radial lines from C to ... which the disk has rotated; every POINT in. Fig.

38.

The red colours used during Rang panchami contains high proportion of lead. plz answer me fast as true or false

Answer»

# Answer - True (Rang panchami COLOURS constitute lead)

# Explanation-

# Rang panchami colours-
During holi PEOPLE play lots of color and enjoy good time with their family and friends. Synthetic colors are made of cheap quality minerals, dyes and fragrances, shiny particles and silica which many times BECAME HARMFUL to people.
One of the biggest culprit of color poisoning is Lead(Pb). Lead is a highly toxic metal and a very strong poison.

# Adverse effects-
Learning disability, highly toxic for children, AFFECTS vital organs, affects unborn children

# Celebrate Holi with safe colors and prevent yourselves from lead poisioning.

39.

What is Group index? What is the data required for finding Group index of a soil?

Answer»

It represents the performance of soil used in the construction of highways & roadways.


Greater the value of Group Index poor will be the QUALITY of soil .


It consider the following parameters in determining the value of GI.

1.particles size

2.liquid limit

3.plasticity Index

GI=0.2a+0.005ac+0.01bd


a= Particle passing 75µ greater than 35% but not EXCEEDING 75%( value lies between 0-40)


b=particle passing 75µ greater than 15% but not exceeding 55%(0-40)


c=value of liquid limit greater than 40% but not exceeding 60%(0-20)


d= value of plasticity index greater than 10% but not exceeding 30%(0-20)

. The minimum value of group index is zero & maximum value is 20


. GI value Quality

. 0-2. good

. 2-5. fair

. 5-10. poor

. 10-20. very poor

40.

Define group index. Explain briefly group index of soil.

Answer»

Determination of Group INDEX Value of Soil Subgrade. Group Index is a number assigned to the soil based on its physical properties like particle size, Liquid LIMIT and plastic limit. It varies from a value of 0 to 20, LOWER the value higher is the quality of the sub-grade and greater the value, poor is the sub-grade.

41.

Which are similarly in between the elements of halogen group ?

Answer»

The halogens all have the property that they have 7 electrons in their OUTER shell.


For quantum mechanical reasons, there is ‘room’ for 8 electrons in the outer shell. So the halogens will react rather strongly with elements that have one or two electrons in their outer shell. These electrons are LOOSELY HELD by their nucleus because they are far from it, relatively speaking.


A GOOD example is table salt, sodium chloride. Sodium has one electron in its outer shell, and chlorine, a halogen, would very much like that electron. So that electron MOVES over to the

42.

a circular metal plate of radius 5cm rest on a layer of Castrol oil to 2mm thick whose coefficient of viscosity is15.5 poise. Calculate the horizontal force required to move the plate with the speed of 5 cm per second

Answer»

Answer:

Explanation: as we KNOW that F=eata

×A×dv by DX so the SOLUTION is GIVE below

43.

What is memorendum........

Answer»

Memorendum is a law PASSED by parliament after MANY debates and discussion as to be SATISFACTORY for population it is ALSO KNOWN as office memorendum..............

44.

What effect on the double slit experimental when white light at the centre of light

Answer»

Hey mate here is your answer》》

Therefore if MONOCHROMATIC LIGHT in Young's interference experiment is replaced by white light, then the waves of each wavelength form their separate interference patterns. The RESULTANT effect of all these patterns is OBTAINED on the screen. i.e., the waves of all colours REACH at mid point M in same phase.

Hope this answer will help you..《《

45.

Mars has a diameter of approximately 0.5 of that of earth and mass of 0.1 of that of earth. The surface gravitational field strength on Mars as compared to that on earth is a factor of-(1) 0.1 (2) 0.2 (3) 2.0 (4) 0.4

Answer»

THANK you for ASKING this question. The question seems to be incomplete. Here is the complete question:


Mars has a diameter approximately 0.5 that of the EARTH, and a MASS of 0.1 that of the Earth.


If the gravitational potential at the Earth’s surface is –63 MJ kg–1, what is the approximate value of the gravitational potential at the surface of Mars?


A: –13 MJ kg–1



B: –25 MJ kg–1



C: –95 MJkg–1



D: –320 MJ kg–1


Answer:


The formula for gravitational potential is V=-GM/r


Take all these values as 1 for Earth, -GM/r = -63 MJkg^-1


the mass of Mars is 0.1M and the radius is 0.5r


When we put all the values in the formula, we will get this:


V=0.2(-GM/r)


Now we will have the value of -GM/r we will multiply it by 0.2


Then you will be able to get the gravitational potential at the surface of Mars.


If there is any confusion please LEAVE a comment below.

46.

Which torque is absent in energy meter? and why?

Answer»

In energy METER,there is no controlling TORQUE as driving torque is enough to cause CONTINUOUS revolution of DISC

47.

Find the number of triangles

Answer»

Heya MATE!!


There are 10 ∆s in a figure...



Hope you LIKE it✌

48.

What is inertia?tell me what is correct answer

Answer»

Answer :

Inertia =>

We have seen that as per Newton's first law of motion, each object resists a change in its STATE of rest or uniform LINEAR motion. In a qualitative way, the tendency of undisturbed Objects to STAY at rest or to keep moving with the same velocity is CALLED Inertia. Due to this very reason, The first law of motion is also known as law of intertia.

Thus, inertia of an object is its inherent PROPERTY by virtue of which it cannot change by itself its state of rest or of uniform motion along a straight line.

THERE ARE 3 TYPES OF INERTIA :

1. INERTIA OF REST :

The inherent property of an object to oppose any change in its state of rest by itself, is called the INERTIA OF REST.

2. INERTIA OF MOTION :

The tendency of an object to oppose any change in its state of uniform motion, by itself, is called the INERTIA OF MOTION.

3. INERTIA OF DIRECTION :

The tendency of an object to oppose any change in its direction of motion is called the INERTIA OF DIRECTION.

49.

Two fat astronauts each of masses 120 kg are travelling in a closed spaceship moving at a speed of 15 m/s in the outer space far removed from all other material objects.The total mass of the spaceship including the astronauts is 660 kg.If the astronauts do slimming exercise and thereby reduce their masses to 90 kg each,with what velocity will the spaceship move?

Answer»

So, Let Me CLEAR One THING... THE SYSTEM OS CLOSED...

Hence The Mass Loosed by Them Will Remain in Spaceship only..

So, It will move with the same VELOCITY it was moving...

So, The Answer is 15 m/s :)

50.

State bernoullis effect

Answer»

Hey there!

Thank you for your Question!

Bernoulli's THEOREM:

The Bernoulli's theorem states that for an ideal FLUID, under steady state condition, the sum of KINETIC energy per UNIT volume, POTENTIAL energy per unit volume (or sum of mechanical energy per unit volume) and pressure per unit volume is constant.

Equation of Bernoulli's theorem:

\huge{{{\boxed{\boxed{\bold{\frac{\rho v^2}{2}+\rho gh + P = Constant}}}}

\\\textbf{where,}\\\bold{\rho} =\textbf{Density of fluid}\\P = \textbf{Pressure}\\v = \textbf{Velocity of fluid in section.}\\g =\textbf{Acceleration due to gravity}\\h = \textbf{Height in the direction of gravity}

Hope It Helps You!