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.

Number of spectral lines in balmer series when an electron

Answer» 1 SPECTRAL LINE in BALMER SERIES
2.

Name two units of length which are bigger than a metre how are they related to the metre

Answer» KILOMETER hectameter because they both have METER in it
3.

Which is bigger a coloumb or charge on an electron?

Answer»

COULOMB charge is bigger because 1coulomb has 6.25×10^18 ELECTRONS. And 1 ELECTRON has a charge of 1.6×10^-19 coulomb.

4.

Which phenomenon proves particle nature of light?

Answer» PHOTOELECTRIC EFFECT
5.

What is the work done by the force of gravity on a satellite moving round the earth ?

Answer»

When a satellite moves around the Earth in a circular path, then the force of gravity acts on it DIRECTED TOWARDS the CENTRE. The motion of the satellite is in the horizontal PLANE. Therefore, the force of gravity of Earth on the satellite and the DIRECTION of motion of satellite are perpendicular to each other. Therefore, net work done = Fs cos 900 = 0. That is, the work done by the force of gravity on a satellite moving around the Earth is zero.
Hope it helps!

6.

Uses of aneroid barometer

Answer»

It is a device which is mainly used for measuring atmospheric PRESSURE CAUSED by EXTERNAL air

7.

We can hold a matchstick while it is burning. why?

Answer»

Hey ....my friend ..when a MATCHSTICK burns it PRODUCES heat and we have no tolerate heat so we can't HOLD a burning matchstick..HOPE this will HELP u my friend....

8.

Example for decomposition reaction

Answer» CACO3 ------ CAO +CO2
9.

A cyclists is travelling at 15ms-1 she applies brakes so that she does not collide with a wall 18m away. What deceleration must she have.

Answer» 3 as the FORMULA is a =v-u÷t
10.

Identify modal fields in tm mode rectangular waveguide

Answer»

A hollow
★ waveguide is a transmission line that looks like an EMPTY metallic pipe. It supports the propagation of transverse electric (TE) and transverse magnetic (TM) modes, but not transverse electromagnetic (TEM) modes. There is an infinite number of modes that can propagate as long as the operating frequency is above the cutoff frequency of the MODE. The notation TEmn and TMmn are commonly used to denote the type of wave and its mode, where m and n are the mode number in the horizontal and VERTICAL directions respectively.
★_-_-_-_-_★_-_-_-_-★_-_-_-_-_★-_-_-_-_-_★
.

11.

What type of motion is exhibited by freely falling body

Answer»

Heyyyyy here's ur answer
GRAVITATIONAL motion is EXHIBITED by freely FALLING body

12.

The angle made by the vector a is equals ti icap + j cap woth x-axis

Answer» RESOLVING the VECTORS into its COMPONENTS
a = 1i + 1j

Now angle made with the x-axis,


tanθ = y/x = 1/1 = 1 


Therefore, 
θ =  45 degrees
13.

Hey !!!!! friends......... what is electric potential and potential difference........ .......

Answer»

Hi   Mehak1503,

Here's the answer you were looking for.

Electric Potential :

             An electric potential (ALSO called the electric FIELD potential, potential drop or the electrostatic potential) is the amount of WORK needed to move a unit positive CHARGE from a REFERENCE point to a specific point inside the field without producing any acceleration.

Potential Difference:


           Potentail difference is the difference of electrical potential between two points.

Hope this helps!!!!!!!!

THANK YOU

(plz mark this answer brainliest if this was good)

14.

Distinguish between addition polymerisation and condensation polymerisation

Answer»

In addition POLYMERISATION no side product is made.
In CONDENSATION polymerisation....H20asside product is LEFT

15.

an object is thrown upward with initial velocity 5m/s and accel. 10m/s². What will be the height attained by it and how much time will it take to reach there?

Answer» HOPE it will HELP you. ..m....
16.

a block of mass is released from rest from a height. the block slides on a frictionless track and reaches the bottom. what is the velocity of the block when it reaches the bottom

Answer»

Velocity of BLOCK when it REACHES at BOTTOM is. =√[2g*HEIGH]
where g is gravitational acceleration

17.

Write three value of avogadro' s constant

Answer»

12 grams of 12C, with the mass number 12 (ATOMIC number 6), has the same number of CARBON atoms,6.022×1023. AVOGADRO's number is a dimensionless quantity, and has the same numerical value of the Avogadro constant when given in base units.

18.

The lower face of an aluminum cube of side 10 cm,is riveted to the floor.A shear modulus of aluminum is 25*10 Nm, find the displacement of the upper edge of the cube

Answer»

........?...........

19.

Which particles emitt from radioactive nucleus?

Answer»

*ALPHA PARTICLES*.....

20.

Why bakelite is used in electrical switches

Answer»

Bakelite is a BAD conductor of heat as WELL as electricity.
That's why it is used in electrical SWITCHES to prevent a person to GET shock

21.

Relation between impulse and momentum

Answer»

Its a REQUIRED RELATION.

22.

Defination of electricity?

Answer» ELECTRICITY is the FLOW of ELECTRON
23.

One coloumb of charge is passed through solution of

Answer»

One COLOUMB of CHARGE is PASSED through the solution of any conductor EVERY SECOND

24.

How is the relative density of a liquid measured

Answer» TOTAL DENSITY of SUBSTANCES UPON density of WATER
25.

A person weight 110.84 on moon whose acceleration due to gravity is 1/6 of that earth. If the value of 'g' on earth is 9.8m/s2 calculate(i) 'g' on moon (ii) mass of person on moon (iii) weight of person on earth

Answer»

The ATTACHMENT has the ANSWER
HOPE it HELPS you.

26.

The distance travelled by a freely falling body in first six seconds?

Answer» ACHA bro
u= -4g
t=1s
a= -G
s = -4g-g/2
distance travelled is -9g/2
where g is GRAVITATIONAL constant
or s=-44.1m/s
27.

A body travel's travel's a distance of 3km towards east then 4km towards north and finally 9km towards east . find its displacement

Answer»

Here is your ANSWER it MAY HELP you ...

28.

If a force f = (2x + 3x2 )î n acts along x-axis on an object and moves it from x = 2î m to x = 4î m, the work done is

Answer»

Work DONE is the dot product of force vector and displacement vector
e.g., W = F.S

Here given ,
F = (2x + 3x²)i , here we see F is VARIABLE so, we have to use integration
So, work done , W = \int\limits^{x_2}_{x_1}{F(x)},dx
W = \int\limits^{4}_{2}{(2x + 3x^2)},dx
= 2\int\limits^{4}_{2}{x}\,dx+3\int\limts^{4}_{2}{x^2}\,dx
= [x^2]^4_2+[x^3]^4_2
= (16 - 4) + (64 - 8)
= 12 + 56
= 68 J

Hence, ANSWER is 68J

29.

Q) two thin lenses (focal lengths f1 and f2 ) are in contact . their equivalent focal length?

Answer»

F=1÷(1/f1+1/f2).....this MAY be the EQUIVALENT FOCAL LENGTH

30.

In What Condition is the distance covered equal to the magnitude of the displacement of the particle?

Answer»

When the WAY is on a STRAIGHT LINE

31.

A force of 5n is applied on 20kg mass at rest. the work done in third second is

Answer»

Acceleration=5/20
=1/4 m/s²

displacement=½a t²
=½*1/4*9
9/8 m

w= f.s
=5*9/8
=45/8 JUL or n/m²

32.

Differentiate between g and G

Answer»

G stands for NEWTON's universal GRAVITATIONAL constant, WHEREAS gstands for the acceleration DUE to gravity at a certain point. G = 6.67300 × 10-11 N.m2.kg-2. ... G is a scalar quantity whereas g is a vector qualtity.

33.

What is oxygen percent in atmosphere.?

Answer» 21 PERCENT..................
34.

A gigen wire of resistance 1ohms is stretched to double its length .what will be its new resistance

Answer»

ANSWER
________________________

SIMPLE FORMULA

Let INITIAL Resistance be R1
Final Resistance be R2

r2 =  {<klux>N</klux>}^{2} r1
where n is the AMOUNT of timez length is multiplied

R2 = 2^2 × 1 ohm

R2 = 4 ohm
___________________

35.

A given wire of resistance 1ohms is stretched to double its length.what will be its new resistance

Answer»

ANSWER:

Hey MATE PLZZ REFER to the ATTACHMENT

36.

an object has moved through a distance can it have zero displacement if yes support your answer with examples

Answer»

Yes it can if the OBJECT COMES back to its ORIGINAL position

37.

an aircraft travelling at 600 km per hour accelerates steadily at 10 km per hour per second tracking the speed of sound as 1100 km per hour at the air crafts altitude how long will it take to reach the sound barrier

Answer»

To reach sound barier
s=ut+1/2atsquare
so from QUESTION 600t+1/2*10tsquare=1100t
600t+5tsquare=1100t
5tsquare-500t=0
5t(t-100)=0
t=100, t=0
but time =0 can't be possible so time =100seconds answer

38.

What are the advantages of synthetic fibres ? explain.

Answer»

Most of synthetic FIBERS' disadvantages are related to their low melting TEMPERATURE:Synthetic fibers do not burn more readily than natural. Prone to heat damage. ... More electrostatic CHARGE is GENERATED by RUBBING than with natural fibers

39.

WHY ARE SAUCEPAN HANDLES, ELECTRIC PLUG AND SWITCHES MADE OF THERMOSETTING PLASTICS

Answer»

Plastics are good insulators. they PREVENT the flow of HEAT and ELECTRICITY.

40.

A motorcyclist drives from place ato b with a uniform speed of 30km/h^-1 and return from place b to a with a uniform speed of 20km/hr. find average speed

Answer»

We KNOW that AVERAGE speed,
Total distance ÷ total time taken
Given,
distance =30km+20km =50km
time taken = 1hour+1hour= 2hour
so when put the VALUES we GET ,
50km÷2hour =25km/hr

41.

A man who weighs 70kg climbs a staircase carrying a 10kg load on his head. the staircase has 25 steps and each step is 25cm height. the work done by the person is

Answer»

H = 25 x25
625 cm
= 6.25m
G = 10m/s square
MASS = 70 +10
80kg

work = mgh
80 x 10 x 6.25
800 x 6.25
5000j
hope this helps U simply if you like plz mark it as brainliest.

42.

Name the physical quantity measured by area under acceleration time graph

Answer» VELOCITY ACCORDING to me....
43.

if the pottential energy of a gas molecule is u=M/r to the power 6 -N/r to the power 12; M andN being positive constants , then the pottential energy at equilibrium must be

Answer»

The answer is yes, it is not TRUE that the LACK of STATIC checking is ?

44.

Define the term centre of mass

Answer»

It is the point inside a BODY...where the whole mass of the body is SUPPOSED to act.

✪Note✪

Dont confuse CENTRE of GRAVITY with centre of MASS..

They r very diiferent things.

45.

What is the height of center of mass of a solid cone from it's base?

Answer»

The height of CENTER of mass from BASE = (1/3) of total height of SOLID cone

46.

दो डंबल के जोड़े जब एक दूसरे से टकराते है तो कैसी धवनि उत्पन्न होती है

Answer» HEY

TAB VIBRATING SOUND is CREATED
47.

Define state of rest and state of motion and what are the types of motion

Answer» REST REFERS to the MOTION when the object does not change it's position with respect to time
When the object changes it's position with respect to time it is said to be in motion
there are VARIOUS types of motion like - LINEAR MOTION, CURVILINEAR MOTION, RANDOM MOTION, TRANSLATOR MOTION, ROTATOR MOTION, REVOLUTIONARY MOTION,
48.

I got comparment in my pysics exam of class 11

Answer» OK!!

Don't WORRY
Do UR BEST this TIME

.✌✌All the best
49.

A gun fires two bullets with same velocity at 60° and 30° withhorizontal. The bullets strike at the same horizontal distance.The ratio of maximum height for the two bullets is in the ratio [?] : [?]

Answer» FIRST TAKE as range1=range2
then u will GET u1=u2
then RATIO is 1:1,plz mark as BRAINLIST
50.

Example of variable acceleration

Answer»

Hey ...^_^

Example of variable acceleration is --

◆ When we apply BREAK on a car moving with the velocity of 40km/h . Then its velocity REDUCED to 0 .

◆A car is moving in a crowded STREET , when car find space it will MOVE with greater speed and if it stuck in crowd then it will move with less speed .