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.

What happens to electricity after it goes to ground?

Answer»

The electrons diffuse into the GROUND and the ground becomes slightly more NEGATIVELY CHARGED. The difference is nearly IMPOSSIBLE to measure, however.

2.

the kinetic energy of an object of mass , m moving with a velociity 5m per second . what will be its kinetic energy when its velocity is doubled?

Answer» PLEASE WRITE the QUESTION detail
hope it is the question you ASKED
3.

a car starting from rest acquires a speed 25 m/s in 10 sec.after which it maintains this speed for 10 sec. find(a) the acceleration (b) distance travelled during acceleration (c) total distance travelled?

Answer»

u = 0 m/s


V = 25 m/s


t = 10 m/s


a) a = ?


As v = u + a t


so, 25 = 0 + a * 10


so, a = 25/10 = 2.5 m/s^2


b) s = ? (for FIRST 10 s)


As s = ut + 1/2 a t^2


so, s = 0 + 1/2 * 2.5 * 10^2


so. s = 125 m


c) s = ? ( for next 10 s)


s = v * t as a = 0 m/s^2


so, s = 25*10


so, s = 250 m


Hnce, TOTAL DISTNCE = 125 + 250


= 375 m

4.

A body Starting from rest and moving with a constant acceleration covers a distance of 20 m in the first second distance covered by it in second second

Answer» YES it was DISCOVERED by SECONDS only
5.

A body of mass 100 kg moving with a velocity of 10m/s strikes an identical body at rest. After collision they stick together.calculate the velocity of the body.

Answer»

Hope this is UR ANSWER .if this is Ur answer PLZZZ mark this answer as BRAINLIEST answer

6.

Which has greater impact if the area in contact is smaller

Answer»

If area is SMALLER, the PRESSURE will be higher as it is inversely proportional to area.

7.

Determine the acceleration when t=1 s if v = (4t2+2) m/s where t is in seconds

Answer»

On differentiating very WELL get

a= 8t m/s ^2
now PUT t=1s
we get
a= 8 (1) = 8m/s^2........

HOPE YOU LIKE IT. ....

8.

Draw a scemetic diagram consisting a battery, a plug key, and a bulb all connected in series with a voltmeter connected in parallel with the bulb

Answer»

I have TRIED my LEVEL best if there's any MISTAKE plzz update me

9.

Convert 20M dyne into N

Answer» 1 N = 100000dyne
I M DYNE = 1000000 dyne =10N
therefore 20 M dyne = 20× 10 =200 N
10.

Define---backlash error

Answer»

In mechanical ENGINEERING, backlash, SOMETIMES called
or play, is a clearance or lost motion in a mechanism caused by gaps between the parts. ... It can be SEEN when the direction of movement is reversed and the
or lost motion is TAKEN up before the reversal of motion is complete

11.

a racing car has unifom accleration of 4m per second square what will be its velocity 3s after tha start

Answer»

By USING the FORMULA v=u+at
we have v=0+4(3)
so v=12m/s

12.

2x-5y+7=0 straight line slope

Answer»

In which STD you are STUDYING?
I'm not aware of the MEANING STRAIGHT slope....
Sorry

13.

a person travelled by train for 1 hour at a speed of 50 kmph. he then travelled by a taxi for 30 minutes at a speed of 32 kmph to complete his journey. what is the average speed at which he travelled during the journ

Answer»

His AVERAGE speed for the JOURNEY is 57 KM PER hour

14.

The volume of 50g of a substance is 20 cm³. If the density of water is 1g/cm3,will the substance sink or float when placed on the surface of water ? What will be the mass of water displaced by the substance? [Ans: 20 g]

Answer»

A) The substance will SINK as the density of the substance is greater than the density of the WATER,i.e. 2.5g/cm³>1 g/cm³
B) According to the Archimedes principle the MASS of the water displaced will be same as the mass of the substance .

15.

We use a straw to drink juice from a glass.what makes this possible?

Answer»

Why Do Straws Work?

Because it is really the atmosphere that is doing the pushing, the atmospheric pressure LIMITS how high water will go up a straw. At SEA level, the AIR pressure is ENOUGH to SUPPORT a column of water about thirty feet high.

Even if you could suck all the air out of a forty-foot straw, the water wouldn’t rise more than thirty feet. In space, where there isn’t any atmospheric pressure, a straw wouldn’t work at all.

16.

The magnitude of vector A ,B,C are 12,5,13 unit respectively, and vector A+B =C ,The angle between vector A and B

Answer»

ANGLE will be 0° ....
HOPE it HELPS you
MARK as brainlist plz PLZZ

17.

Why does hot air goes up

Answer»

The FASTER speed of the GAS particles in hot AIR cause the particles to be more spread out than in cool air. Thus, hot air has a lower density and WOULD TEND to rise.

18.

A man walks 30m towards north, then 20m towards east and in the last 30root2 m towards south-west. The displacement from origin is:

Answer»

The DISPLACEMENT from the ORIGIN is APPROX. 6.3m in South-West DIRECTION

19.

the drift velocity of free electrons through a conducting wire of radius R carrying current I is will be the same current is passing through a conductor of radius 2r what will be the Drift velocity

Answer»

The drift velocity will remain same because CURRENT doesn't depend on CROSS SECTION AREA of conductors.

20.

A small bottle weighs 20 g when empty and 22 g when filled with water. When it is filled with oil it weighs 21.76 g. What is the density of oil ? [ Ans: 0.88 g/cm₃]

Answer»

Mass of bottle = 20g


Mass of water = 2gm


We KNOW density of water is 1g/cc


∴ Volume = 2 cc


Mass of OIL = 1.76

Volume = 2cc

Density = Mass / Volume

= 0.88



Hope it HELPS you



Please mark as the BRAINLIEST answer


21.

The greater and least resultant of two forces are 9N and 5N respectively. If they are applied at 60 degrees. The magnitude of the resultant is

Answer»

Greater resultant = a + b = 14
Least resultant = a_ b = 4

At 60° ... use law of COSINE
ANS is 12.28


Hope It helps you
Mark as BRAINLIST plz PlzZ

22.

What is hypermetropia state its two causes and how it can be prevented

Answer»


What causes long sight (hypermetropia)?
The causes of long sight are usually hereditary (genetic). Long sight can OCCUR at any age but it TENDS to become more noticeable above the age of 40 years.

In rare cases, long sight is caused by other conditions such as diabetes, small eye syndrome (microphthalmia), cancers around the eye and problems with the blood vessels in the retina.

Many BABIES and very YOUNG children tend to be slightly long-sighted but usually grow out of this by about 3 years of age.

23.

What are measurement errors and recording mistakes?

Answer»

1. Measurement errors :

They OCCUR when the scale is read incorrectly either by overreading the scale or undereading the scale to GIVE a lower or a higher reading of the ACTUAL measurement.

2. Recording mistakes occur when the readings are noted down wrongly. That is writing correct readings in the wrong COLUMNS or even writing different readings from the ones taken.

This happens either when one forget some decimal points or even INTERCHANGES two digits.

24.

How much pressure do we carry on our heads and why dont we feel it??

Answer»

It's sounds more as a PSYCHOLOGICAL question....
and we FEEL it as stress and our BODY reacts to it...the only thing is that now-a-days no one CARES about it.

25.

How can you find the centre of gravity of a India map made of steel? Explain.

Answer»

We need to CALCULATE the Centre of the gravity of the Indian map made up of the steel.


Since, Indian Map does not have the GEOMETRICAL significance. I means that it does not have the Proper shape like any shape in Geometry. Thus, we need to considered it has irregular.


Now, By considering it as irregular, we can calculate the Centre of the gravity by the method of finding the centre of gravity in case of Irregular lamina.


Steps for it ⇒


1. First create the small three hole on three opposite sides of the Indian Map. Then, From first hole, tie the thread and suspend the map. When the map is suspended, then the line going starlight to the bottom of the map is marked.


2. Same method is applied in second hole and third hole. Ans two more lines are marked on the map.


3. Note the Point of the Intersection of the three lines. Where these POINTS meets, the centre of the gravity of the Map lie at theta place.


This method can be used to find the centre of the gravity of any irregular lamina or any irregular body.



Hope it HELPS. :-)

26.

The scientific method requires that scientific evidence be validated by

Answer»

Scientific METHOD is an empirical method of knowledge acquisition, which has characterized the development of natural science since at least the 17th century, involving careful observation, which INCLUDES rigorous skepticism about what one observes, given that cognitive assumptionsabout how the WORLD works influence how one interprets a percept; formulating hypotheses, via induction, based on such observations; experimentaltesting and measurement of deductions drawn from the hypotheses; and REFINEMENT (or elimination) of the hypotheses based on the experimental findings. These are principles of the scientific method, as OPPOSED to a definitive series of steps applicable to all scientific enterprises.

27.

How can we identity the type of mirrors without touching them

Answer»

By LOOKING at the TYPE of IMG FORMED

28.

A stopwatch has 10 divisions graduated between 0 and 5 seconds marks. What is the least count

Answer»

Least count of stopwatch=RANGE of time/total divisions.

in the GIVEN CONDITION, divisions are 10,and range is 5seconds.

so its least count=5/10=1/2second

29.

a local train of 150 meters long passes boy running at speed of 3km/ht in same direction in 10 sec.what would the spped of trian

Answer»

It's ANSWER isome 14.167 METER / SECOND

30.

The bob of a simple pendulum of length 1 m has mass 100g and a speed of 1.4 m/s at the lowest point in its path. Find the tension in the string at this moment. (Ans: 1.076N)

Answer»

Given conditions ⇒

Mass =100 g

=0.10 kg

Velocity (V)=1.4 m/s

RADIUS(r)=1 m



The Tension in the string at the lowest point will be DUE to the weight of the bob and circular motion of the bob.

Therefore,

Tension = Force of gravity + Centripetal Force

∴ Tension = mg + mv²/r


∴ T = 0.10 × 10 + 0.10 × (1.4)²/1

⇒ T = 1 + 0.196 N

∴ T = 1.196 N



Hence, the tension in the string at the Instant = 1.196 N.



Hope it HELPS.

31.

A scooter weighing 150kg together with its rider moving at 36 km/hr is to take a turn of radius 30 m. What force on the scooter towards the center is needed to make the turn possible? Who or what provides this? (Ans: 500N)

Answer»

MASS of the scooter(m) = 150 kg.

Radius(r) = 30 m.

Velocity of the Scooter(v) = 36 km/hr.

= 36 × 5/18 = 10 m/s.


Using the FORMULA,

Force = mv²/r

⇒ Force = 150 × 10²/30

∴ F = 500 N.



HENCE, the Centripetal Force of magnitude 500 N is acting on the scooter.



Hope it helps.

32.

An object of mass 50 kg is accelerated unformly from a velocity of 2m/s to 6m/s in 10m/s.Calculate the initial and final momentum of the object and the force acting on it

Answer»

The Initial MOMENTUM is 100kgm/s and Final Momentum is 300kgm/s.... The Force ACTING on object is 20N....( I have considered time as 10s, as there's an ERROR in your QUESTION)

33.

5. a car traveling with 5/7 of its actual speed covers 42 km in 11 hr 40 min 48 sec. what is the actual speed of the car?

Answer»

Answer:

Time taken = 1 hr 40 MIN 48 SEC = 1 hr4054min=17551hrs=75126hrs.

Let the ACTUAL speed be x km/hr.

Then, 75x×75126=42

⇒x=(5×12642×7×75)35km/hr.

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34.

Find the free-fall acceleration of an object on the surface of the moon, if the radius of the moon and its mass are 1740 km and 7.4 x10²² kg respectively. Compare this value with free fall acceleration of a body on the surface of the earth.(Ans: approximately 1.63 m/s²)

Answer»

Acceleration DUE to the GRAVITY on Earth = 9.8 m/s².


We KNOW that the acceleration due to the gravity on the MOON is 1/6th that of the Earth.


∴ Acceleration due to the gravity on moon = 1/6 × 9.8 m/s².

= 1.63 m/s².




Hence, the acceleration due to the gravity on the moon is 1.63 m/s².



Hope it helps.

35.

How are bita particles emitted from the nucleus

Answer»

When there is ATOMIC DIFFUSION the all THREE particles ALPHA ,BETA,gamma are emitted with a high radiation

36.

How many ways when three identical condenser are connected together

Answer»

In PARALLEL and in SERIES

37.

A car with velocity of 10mper second square and acclerates 5 mper seco d calculate velocity when it is has travelled

Answer»

Your QUESTION is INCOMPLETE

38.

how far from a lamp must a concave mirror of focal length 3.0 m be placed in order to throw its image on the screen 8.0 m from the lamp?

Answer»

1/8 -1/U=1/3 u is 24/5

39.

Two spherical balls of mass 10 kg each are placed with their centers 10 cm apart. Find the gravitational force of attraction between them. (Ans: 10⁴G)

Answer»

Mass of the each Spherical BALLS = 10 kg.

Distance between the Spherical balls = 10 cm. = 0.1 m.


USING the FORMULA,

F = Gm₁m₂/r²

∴ F = 6.67 × 10⁻¹¹ × 10 × 10/(0.1)²

∴ F = 6.67 × 10⁻¹¹ × 10⁴

∴ F = 6.67 × 10⁻⁷ N.

∴ F ≈ 10⁴ G



Hence, the gravitational force of the attraction between the spherical balls is 6.67 × 10⁻⁷ N or 10⁴G N.



Hope it HELPS.

40.

Two cars having masses m₁and m₂ move in circles of radii r₁ and r₂ respectively. If they complete the circle in equal time. What is the ratio of their speeds and centripetal accelerations? (Ans: r₁/r₂,r₁/r₂)

Answer» FINAL Answer : \boxed {r_1 /r_2 , r_1/r_2}

Steps:
1) SINCE, Time period is same for both the CARS.
v \propto circumference\:\:of \:circle \\  => v\propto r
Therefore,
\bold {v_1 /v_2 = r_1/r_2}

2) Angular velocity is same in both the cases.
Therefore,
a \propto r \\ =>\blue {a_1/a_2 = r_1/r_2}

HENCE, we got our desired result.
41.

Only oil lamp is used as lighting source in which classical form

Answer»

I have to GO to work and U for a few days but for now I'm going for me which for me and my family is going on with me and my wife would like to see the car and the other ONE is in for the night but I don't think I can do it for you if you want to come by and see you.

42.

On a track of 100 km a train travels the furst 30 km at a speed of 30km/h. how fast must train travel the next 70km so that the average speed of train for entire trip becomes 40km/h

Answer»

Average speed is 40kmph and total distance is 100km
so time taken is 100/40=2.5 hr
distance COVERED in 1st hris 30km
REMAINING 70KM should be COVERD in1.5 hr
so speed is 70/1.5=700/15=160/3=53.3kmph

43.

Differentiate y=cos(5-3t). NO SPAM PLEASE

Answer»

dy/dt= [-SIN(5-3t)/5-3t]3

dy/dt= [-sin(5-3t)/5-3t]3dy/dt=-3sin(5-3t)/5-3t

dy/dt= [-sin(5-3t)/5-3t]3dy/dt=-3sin(5-3t)/5-3tanswer

44.

Explain why to an eye under water ,the outside world appears to be conical.

Answer»

Water has REFRACTIVE INDEX more than water. It DIVERGES the light BEAM and THUS

45.

Mean by velocity and acceleration

Answer» VELOCITY MEANS change in DISPLACEMENT and ACCELERATION means dv dt
46.

Why is there a thick bed 0f sand for a high jumper to fall on his jump

Answer»

HOPE it HELPS................

47.

a man crosses a stationary bus in 18 s. the same bus crosses a pole in 4 s. what is the respective ratio between the speed of the bus and the speed of the man

Answer»

Let the length of the bus be L m.

TIME TAKEN by the man to cross the bus is 18s

so, velocity of the man = L/18 m/s

Now time taken by the bus to cross the pole

is 4 s

so, velocity of the bus = L/4 m/s

Ratio = speed of the bus : the speed of the man

= L/4 : L/18

= 18 : 4

= 9 : 2

48.

A ball is dropped from a balloon going up at a speed of 5 m/s. If the balloon was at a height 60 m. at the time of dropping the ball, how long will the ball take to reach the ground? (Ans: 4s)

Answer»

Given conditions ⇒


Initial Speed of the ball(u) = -5 m/s.

[Since, ball is dropped from the BALLOON].

Height of the balloon = 60 m.

Acceleration DUE to GRAVITY = 9.8 m/s²


Using the Formula,

S = ut + 1/2at²

⇒ 60 = -5t + 1/2 × 9.8 × t²

⇒ 60 = -5t + 4.9t²

⇒ 4.9t² - 5t - 60 = 0

∴ 49t² - 50t - 600 = 0

This is TH quadratic equation. If we solve it by the methods of the quadratic Formula,

we wlil get, t = - 4.02 and t = 3.03 seconds.


Since, time cannot be negative. Hence time will be 3 seconds.



Hence, the time taken by the ball is 3.02 seconds.


Hope it helps.

49.

Name the satellite that will be launched by isri to study solar physics during 2019-2020 timeframe by pslv-xl from sriharikota

Answer»

Aditya - L1 First Indian mission to study the Sun

The Aditya-1 mission was conceived as a 400kg class satellite carrying one payload, the Visible Emission Line Coronagraph (VELC) and was planned to launch in a 800 km low EARTH orbit.  A Satellite PLACED in the halo orbit around the LAGRANGIAN point 1 (L1) of the Sun-Earth system has the major advantage of continuously viewing the Sun without any occultation/ eclipses.  Therefore, the Aditya-1 mission has now been revised to “Aditya-L1 mission” and will be inserted in a halo orbit around the L1, which is 1.5 million km from the Earth.  The satellite carries additional six payloads with enhanced science scope and objectives.

The project is approved and the satellite will be launched during 2019 – 2020 timeframe by PSLV-XL from Sriharikota.

Aditya-1 was meant to observe only the solar corona.  The outer layers of the Sun, extending to thousands of km above the disc (photosphere) is termed as the corona.  It has a temperature of more than a million DEGREE Kelvin which is much higher than the solar disc temperature of around 6000K. How the corona gets heated to such high temperatures is still an unanswered question in solar physics. 

 Aditya-L1 with additional experiments can now provide observations of Sun's Photosphere (soft and hard X-ray), Chromosphere (UV) and corona (Visible and NIR).  In addition, particle payloads will study the particle flux emanating from the Sun and reaching the L1 orbit, and the magnetometer payload will measure the variation in magnetic field strength at the halo orbit around L1.   These payloads have to be placed outside the interference from the Earth’s magnetic field and could not have been useful in the low earth orbit.

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50.

HELP PLEASE!!DONT FAKE ANSWER AND ILL MARK BRAINLIEST IF YOU WRITE CORRECT!!A train starting from a railway station and moving with uniform acceleration attains a speed 40km/h in 10 mins. Find its acceleration.( Final answer should be:a=0.0185m/s^2)

Answer»

Here it is...................