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.

While using a fixed pulley effort is equal to the load then how it makes work easier??

Answer» EQUAL load KEEP up both SIDES load LOW and work easily
2.

A 10kg body suspended by a rope is pulled by horizontal force to make an angle of 60

Answer»

Your question is quite incomplete.

According to the given data , As MASS and angle both are given then we NEED to find the horizontal FORCE F = ?

As given .

Mass = 10 kg.

g = 10 m /sec²

θ= 60°


We know the formula


F =mg cosθ


Now put the VALUE in the formula .

F = 10 × 10 COS 60°

F = 100 × cos 60°

F = 100/2

F = 50 N.




Hope it Helps :-)

3.

Two objects of masses m1 and m2 fallfrom the heights h1 and h2 respectively.Th e ratio of the magnitude of theirmomenta when they hit the ground is

Answer»

By Newton 3rd law of MOTION, v^2 = u^2 +2as
So, V1 ^2 = 0 + 2gh1 .
therefore v1 =√2gh1
Similarly v2 =√2gh2.
so the ratio of momenta = m1v1/m2v2
=(M1 × √2gh1)/(M2 × √2gh2) =(m1√h1)/(m2√h2).

4.

Show that acceleration is constant

Answer» ACCERATION is CONSTANT when the GRAPH is LIKE that
5.

an electric bulb marked as 40W and 220V is used in a circuit of supply voltage 100V .Now its power is

Answer»

I THINK it will HELP you

6.

A tv set is an example of matter and so is the signal it receives do you agree explain

Answer»

No TV is matter as it has MASS as well as volume but signal has NEITHER has mass nor volume and hence it is not a matter

7.

How to construct a solar system showing circular motion.

Answer»

With BALL,THREAD,THERMACOL and CHARTS

8.

four resistances p q r x formed a wheat stone bridge. the bridge is balanced when r is 100 ohms . if p and q is interchanged the bridge balance 121 ohms for r. what is the value of x

Answer»

X= 110 ohm.
in the first case: p/q = 100/x
so x = 100q/p .........(1)

in the nxt case, q/p= 121/x
so x= 121p/q. ...........(2)
eqn 1. and 2. are same... so by equating... ANS is 110 ohm

9.

a ball is thrown downward from the top of building and reaches the ground in 3 sec what is the height of building

Answer»

ʜᴇʟʟᴏ ᴍᴀᴛᴇ!

Here, things to be noticed are

A ball is thown from up to down, from terrace hence,

u ( initial VELOCITY ) = 0

Time taken = 3s

Acceleration due to gravity = 10 m/s²

s = UT + 1/2 ( at² )

s = (0)(3) + 1/2 (10)(3)²

s = 0 + 5*9

s = 45 m

Hence, HEIGHT of building is 45 m.

Hope it helps

10.

Cool the steam it produces the liquid and how to come that

Answer»

Because of
the HEAT PRODUCED

11.

How many galaxies are known by us nowadays??

Answer»

Hey friend here is ur answer

Researchers dubbed this the eXtreme Deep Field. All in all, Hubble reveals an ESTIMATED 100 billion galaxies in the universe or so, but this NUMBER is likely to increase to about 200 billion as telescope technology in SPACE improves, Livio TOLD Space.com.

pls #follow me#

12.

the solenoid can be regarded as a combination of circular loop placed side by side each behaving like a magnet of magnetic moment ia where i is the current and a area of the loop

Answer»

What's UR QUESTION??

13.

A current of 2a flows through a bulb calculate energy transfer

Answer» ENERGY TRANSFER is equal to the 2 JOULES per second
14.

A copper wire having resistance r is cut into 4 equal parts. find resistance of each part in terms of original resistancs of wire

Answer»

ANSWER:

PLEASE MARK me BRAINLIST please please please please please please please please please please please please please please please

15.

Comparison of emfs of two cells using potentiometer

Answer»

Here, the FALL of POTENTIAL along the length l of the potentiometer wire is equal to the emf of the cell, as no current is being drawn from the cell. Then, ... Thus it is possible to COMPARE the emf's of TWO given CELLS by measuring the respective balancing lengths l1 and

16.

Calculate the speed of light in a medium having refractive index 4/3

Answer»

Refractive INDEX= SPEED of light in VACUUM /in other medium
so 4/3= 3*10^8/x=2.22*10^8 m/s

17.

A car is travelling at a speed of 30 km per hour is brought to rest in a distance of 8 m by applying brake if the same car is moving at a speed of 60 m per hour then it can be brought to rest with the same braking

Answer»

u = 30 km/h = 30 *5/18 m/s


= 25/3 m/s


v = 0 m/s


s = 8 m


as v^2 - u^2 = 2 a s


so, 0 - (25/3)^2 = 2 a * 8


or, - 625/9 = 16 a


or, a = - 625/144 m/s^2


Now, u = 60 km/h = 60*5/18 m/s


= 50/3 m/s


v = 0 m/s


a = - 625/144 m/s^2


and v^2 - u^2 = 2 a s


so, 0- (50/3)^2 = 2(-625/144) s


or, 2500*144 / 9*2*625 = s


so, s = 32 m

18.

A car is travelling with a velocity of 20m/s suddenly car driver sees a child at a dustance of 50m from his ca whay will be the minimum deaccelaration

Answer» HOLA USER!!

Your answer :-

given = > \\ distance = s = 50m \\initial \: velocity = u = 20 \frac{m}{s} \\ final \: velocity = v = 0 \frac{m}{s} \\ \\ the \: three \: equations \: of \: motion \: are = \\ = > v = u + at \\ = > s = ut + \frac{1}{2} a {t}^{2} \\ = > {v}^{2} = {u}^{2} + 2as \\ \\ this \: can \: be \: solved \: by \: the \: 3rd \: equation. \\ \\ = > {v}^{2} = {u}^{2} + 2as \\ \\ = > {0}^{2} = {20}^{2} + 2 \times a \times 50 \\ \\ = > 0 = 400 + 100a \\ \\ = > - 400 = 100a \\ \\ = > \frac{ - 400}{100} = a \\ \\ = > - 4 \frac{m}{ {s}^{2} } = a

But we had to find DECELERATION so =>

a = - 4
- a = 4m/s^2


Hope it helps!!

☆ Regards @e ☆
19.

Compression members in a truss is generally known as

Answer» COMPRESSION MEMBER in a TRUSS is KNOWN as STRUTS.
20.

What is difference b/w resistance nd resistivity

Answer»

Rasictance----


1.Resistance ofa conductor is the obstruction offered by the conductor in the flow of CURRENT through it. It is measured by the potential difference NEEDED by the conductor to flow the ampere through through it. 2. The resistance to the conductivity depends on its MATERIAL, temperature, length and AREA of ​​cross section. UNIT of resistance is ohm 3.its unit is ohm.

resistivity ------


1. Resistivity is the property of the conductor due to which it offers resistance to the flow of current through it. It is measured by the resistance offered by 1m length of wire of that of material of area of ​​croSS sectionT m2
2.Resistivity of the material depends only on its material and temperature
3.
it's unit is ohm meter....

21.

a body p is thrown vertically up with velocity of 30m/s and another body q is thrown up along the same vertical line with same velocity but 1 second later from the ground when they meet

Answer»

Answer SHHI HAI YA glt. COMMENT krna ..

22.

1 Joule =____Calorie

Answer»

Hey mate here is your answer....

1 joule = 0.24 calories.

HOPE it helps you..
.

mark it BRAINLIEST if you LIKE.

:-)

23.

A brass rod of length 3 meter is clamped at the centre it emits a not of frequency 600 hz when longitudinal vibration are excited

Answer» ALRIGHT I will give you the ANSWER SHORTLY just WAIT for a minute
24.

A body is thrown vertically up from the ground. it reaches a max height of 10 m in 5 secs...after what time it will reach the ground frm max height

Answer»

After 5 SECONDS from the max HEIGHT
T= 10S ( whole JOURNEY)
Because Time of ascending = Time of DESCENDING

25.

A book.is placedon.a table is at rest. is/the force of friction acting on it or not?

Answer»

Hello
yes the gravitational FORCE is ACTING on the book.

NORMAL force is ALSO acting.
26.

Calculate the effective capacitance between a and b

Answer»

Where's your DIAGRAM?..PLZZ SEND UR diagram..I will SOLVE it

27.

Calculating mode for grouped frequency distribution

Answer»

hey BRO if you want answer for this QUESTION plss go and type this link on youtube. HTTPS://youtu.be/A1YzlPC5wTE

if it helps you PLS MARK as brainliest.

and if possible a thank you plss..

28.

Introduction of synthetic fibers in the textiles industry brought revolutionary change across the world in the dressing patterns irrespective of culture and customs .how do you appreciate this.?

Answer» ALRIGHT I will GIVE you the ANSWER SHORTLY just wait for a MINUTE
29.

A boat can travel with a speed of 13km/hr in still water if the speed of the stream is4 km/hr find the time taken by the boat to go 68 km downstream

Answer»

t

=

4

h

Explanation:

We're asked to find the time

t

it takes a boat to travel

68

km

.

We know:

SPEED of boat with respect to earth:

13

km/h

speed of stream with respect to earth:

4

km/h

We're given that the boat travels DOWNSTREAM, i.e. with the CURRENT, so the NEW speed of the boat is

13

km/h

+

4

km/h

=

17

km/h

The time to travel

68

km

with this speed is thus

t

=

68

km

17

km

h

=

4h

HOPE it helps. pls maek as brainliest, and a thanks plss


30.

What is turning operation

Answer»

HEY ...



YOUR ANSWER:•

--------------------------

Turning is a form of machining, a material REMOVAL process, which is used to CREATE rotational parts by cutting away unwanted material. The turning process REQUIRES a turningmachine or LATHE, workpiece, FIXTURE, and cutting tool.



I HOPE IT IS HELP YOU--

31.

A ball thrown vertically upward with speed 19.6 m per second from a top of a tower and return to the earth in 6 second find the height of the tower

Answer»

If ball is thrown upwards,

then it can be derived that,

H = - ut + at^2/2

(u= 19.6 m/s= 2G m/s)

Thus,

H = - 12G + 18g = 6g

Height of tower is 58.8 m

Hope it helps
ALSO,follow me on INSTAGRAM @_xricx
Thank you

32.

100cc motorcycle rideing 120000 km what happens in engine

Answer»

If a CAR has 100K miles or more, it's considered "not reliable" and pretty used. Now, when I look through used bike CLASSIFIEDS, the majority of BIKES with the most miles have between 20K-30K. Why is that? Is 20K-30K alot of miles for a bike. A TYPICAL car can run with minor problems to about 120K miles.


33.

How long does a proton live?

Answer» HEY USER


____________//___/_______/_____=____=/_


HERE IS YOUR ANSWER


__^^_______^^€_^_€€___€€€



10 the POWER 30



I HOPE IT IS HELP YOU

DEAR
34.

Please give answer.....

Answer»

The ANSWER is 12x^3-14x+5

35.

Sini/sinr = constant ... whats the meaning of this ?

Answer»

It is a constant ,given by snell.
It is used in REFLECTION or REFRACTION of light,
STAY HAPPY

36.

A particle is moving in a straight line under constant acceleration of 4 metre per second square if its velocity at time is equal to zero is 10 M per second the displacement of particle is the fifth second of its motion is

Answer»

Motion in fifth second will be motion performed after 4 seconds and UPTO 5 seconds.
Thus you can FIND it by finding displacements after 5 second and 4 seconds and subtracting them.

or u can simply USE FORMULA of DISPLACEMENT in nth second for uniformly accelerated rectilinear motion.

Hope! it will be helpful.

37.

a velocity of particlef mass 250gm changes from 10m/s to 16m/s. Assuming that a constant force acts on it.Find the magnitude of force

Answer»

Hope it helps U......
if any query PLZ let me KNOW.....

38.

Is it necessary to take x axis as i^?

Answer»

Yes. because it is representative of X AXIS

HOPE IAM correct.

39.

Any body kept in a fluid experiences an upward force called

Answer»

The upthrust force or Buoyancey experience in UPWARD DIRECTION if ANYTHING KEPT in fluid.

40.

A particle moves according to the equation x=2t^2-5t+6 find average velocity

Answer»

Its VELOCITY is the INTEGRATION of x.
so V= 2t^3/3 - 5t^2/2+6.

41.

An optimal current ratio should be greater than 1.0. a. true b. false

Answer»

True.

Current ratio is a PART of Liquidity ratio, and it means that whether the COMPANY can pay off its OBLIGATIONS, be it short-term or long-term. It checks the current TOTAL assets of a company against that of the current total liabilities.

Current Ratio = Current Assets/Current Liabilities;

The Ideal Current ratio is greater than 1. If it is less than 1, it means that the company is not able to pay off its obligations. Whereas, if it is greater than 1, it means that the company can pay off its obligations and still have some leftover.

42.

Please explain derevation of 2nd equation of motion mathematically

Answer»
(2) Second equation of motion:
s = ut + 1/2 at^2
sol.
Let the distance travelled by the body be “s”.
We know that
Distance = Average VELOCITY X Time
Also, Average velocity = (u+v)/2
.: Distance (t) = (u+v)/2 X t …….eq.(1)
Again we know that:
v = u + at
substituting this value of “v” in eq.(2), we get
s = (u+u+at)/2 x t
=>s = (2u+at)/2 X t
=>s = (2ut+at^2)/2
=>s = 2ut/2 + at^2/2
or s = ut +1/2 at^2
This is the 2ND equation of motion.
43.

If a is a vector and x is a non-zero scalar,then:1). xa is a vector in the direction of a2). xa is a vector collinear to a3).xa and a have independent directions4).none of these

Answer»

Option 1 is CORRECT ANSWER SINCE multiplying scalar quantity with a VECTOR quantity only change its MAGNITUDE.

44.

Please solve this Questions (I) and (ii)

Answer» ACCELERATION = 20 m/s
(II)= 2.5
45.

Write a mathematical formula for calculating force

Answer»

Hey here is your ANSWER
.
F= ma
Where m is MASS of the body.. And a is ACCELERATION.

46.

Answer 10,11,12 please

Answer»

Ok THATS not EASY U shld try hard

47.

Prove that only genius can solve this problem

Answer» HOPE it HELPS U.....
48.

Among common salt camphor sugar and sand which is sublimate

Answer»

Sublimation is the change of state of a solid DIRECTLY to gas and a gas directly to a solid.

Here among common salt, CAMPHOR, sugar and salt. Camphor follow sublimation.

This MEANS that a camphor can change its state to gaseous state without passing through the LIQUID state and vice versa.

49.

Can anyone give me the answer of these 2 questions please

Answer»

Both the questions involve a common concept, and we will see it first.

Situation: A ball of mass m moving with velocity v collides with another identical ball of same mass kept at rest. What will be the final velocities of the balls?

Our data:

Mass of both balls = m

Initial Velocity of ball 1 = u_1 = v

Initial Velocity of ball 2 = 0

Final Velocity of ball 1 = v_1 (say)

Final Velocity of ball 2 = v_2 (say)

From Law of Conservation of Momentum, we have:

m_1u_1+m_2u_2=m_1v_1+m_2v_2\\\\\implies mv+m(0)=mv_1+mv_2\\\\\implies mv=m(v_1+v_2)\\\\\implies v_1+v_2=v\quad ---(1)

We are also assuming the collision to be elastic. This means that Kinetic Energy is conserved.

\frac{1}{2}m_1u_1^2+\frac{1}{2}m_2u_2^2=\frac{1}{2}m_1v_1^2+\frac{1}{2}m_2v_2^2\\\\\\\implies mv^2=mv_1^2+mv_2^2\\\\\\\implies v_1^2+v_2^2=v^2\\\\\\\implies v_1^2+v_2^2=(v_1+v_2)^2 \quad\text{[Using (1)]}\\\\\\\implies v_1^2+v_2^2=v_1^2+2v_1v_2+v_2^2\\\\\\\implies 2v_1v_2=0\\\\\\\implies v_1v_2=0

\implies v_1=0 \quad OR \quad v_2=0

But Ball 1 hit a stationary ball (Ball 2). The stationary ball must have started moving. So v_2 \neq 0

So, v_1=0 and hence v_2=v

This means that, When Ball 1 moving with velocity v collided with another identical ball, Ball 2, which was at rest, then the velocities of Ball 1 and Ball 2 got exchanged.

That is, now Ball 1 comes to rest, and Ball 2 starts to move with velocity v.

So, we will use this simple concept: When two identical objects collide, their velocities get exchanged. [This is the general statement, and is valid even when both objects are moving]

___________________________

Question 1: A particle of mass 0.1 kg moving with a speed v collides with another identical particle at rest.

As we KNOW, velocities will get exchanged. So, after collision, Particle 1 comes to rest, and the second particle starts moving.

The kinetic energy of this particle is GIVEN as 0.2 joules. So we have:

\frac{1}{2}mv^2=0.2\\\\\\\implies\frac{1}{2}\times 0.1\times v^2=0.2\\\\\\\implies v^2=\frac{0.4}{0.1}\\\\\\\implies v^2=4\\\\\\\implies \boxed{\bold{v=2\,\, m/s}}

In a perfectly elastic collision, no kinetic energy was lost. So, the speed v of initial particle is transferred to the second particle. Thus, we will get the minimum possible value of v.

In a perfectly inelastic collision, loss of kinetic energy is maximum. So, when speed of first particle is v, the speed of each particle after collision will be LESS than v. In this case, for the energy to equal 0.2, more initial velocity will be required. So, perfectly inelastic collision will give maximum value of v.

So, the answer we obtained just now is Option (1) Minimum value of v is 2 m/s.

Let us also calculate the Maximum Value of v, for which we require Perfectly Inelastic Collision.

Law of Conservation of Momentum states:

m_1u_1+m_2u_2=m_1v_1+m_2v_2\\\\\implies mv=mv_1+mv_2\\\\\implies v=v_1+v_2\quad ---(1)

Also, since coefficient of restitution is zero, we have:

\displaystyle -\left( \frac{v_2-v_1}{u_2-u_1}\right)=e\\ \\ \\ \implies -\left( \frac{v_2-v_1}{u_2-u_1}\right)=0 \\ \\ \\ \implies v_2-v_1=0 \\ \\ \\ \implies v_1=v_2=v' \quad (say)

Putting it in (1), we have:

v=v'+v' \\ \\ \\ \implies v' = \frac{v}{2}

Since final kinetic energy is 0.2 joules, we have:

\frac{1}{2}mv_1^2 + \frac{1}{2}mv_2^2=0.2 \\\\\\\implies mv'^2+mv'^2=0.4 \\ \\ \\ \implies 2mv'^2=0.4 \\ \\ \\ \implies v'^2=\frac{0.2}{0.1} \\ \\ \\ \implies \left( \frac{v}{2} \right)^2=2 \\ \\ \\ \implies \frac{v^2}{4}=2 \\ \\ \\ \implies v^2=8 \\ \\ \\ \implies \boxed{\bold{v=2\sqrt{2} \, \, m/s}}

This is the maximum possible value of v.

To Summarize, we have:

\boxed{\begin{array}{ccl}v_{min}&=&2 \, \, m/s\\ \\v_{max} &=& 2\sqrt{2} \, \, m/s\end{array}}

Answer stands at Option (1)

___________________________

Question 2:

This is an interesting question, which can be solved LOGICALLY by the Situation we solved initially.

A ball is moving with velocity v. It collides with the Ball 1 among the group of five balls.

By the result of our Situation, we know that the initial Ball will come to rest, and Ball 1 will ACQUIRE a velocity v.

But Ball 2 is present immediately next to Ball 1. Ball 1 collides immediately with Ball 2. Ball 1, which momentarily had a velocity, now again comes to rest, and Ball 2 now acquires the velocity v.

The same thing happens for other balls. They momentarily gain velocity v, but immediately collide and again come to rest.

In this way, the energy keeps on transferring from Ball 1 to Ball 2, and so on till Ball 5. There is no obstruction in the path of Ball 5. Thus the Ball 5 continues to move with its velocity v. All other balls are now at rest.

So, overall, Energy is sequentially transferred from the initial ball to Ball 5.

Thus, the Answer is Option (3) Ball 5 will move with velocity v, rest all balls will come to rest

50.

Line integral of electric field

Answer»

The multiplication of electric field and the path length gives LINE integral of electric Field.

Let there be TWO point A and B on a non uniform electric field (magnitude and DIRECTION at every point is DIFFERENT). The irregular line denotes the path travelled by CHARGE. With changing Electric field, the path travelled by a charge also changes at every point on the curve.

Line Integral

To find line integral at every point, take a very small length dl on the path. So that dl makes a certain angle θ with the electric field.