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.

Please explain the answer with reason​

Answer»

Answer:

2) Force is PERPENDICULAR to MOMENTUM.

Explanation:

P= B[sinwt i + coswt J]

Force = dP/dt

Differentiating, using chain rule.

F= B[coswt×w i + -sinwt ×w j]

= Bw[coswt i - sinwtj]

P.F(dot product of P vector and F vector) |P|×|F|×cos THETA= coswt×sinwt - coswt×sinwt = 0

Therefore, Force and Momentum are perpendicular to each other.(theta=90°).

2.

Define omh law. in long ​

Answer»

Explanation:

Ohm's Law is a FORMULA USED to CALCULATE the relationship between voltage, current and resistance in an electrical circuit. To students of electronics, Ohm's Law (E = IR) is as fundamentally IMPORTANT as Einstein's Relativity equation (E = mc²) is to physicists.

3.

B) 3kg of an ideal gas is expended from a pressure 7 bar and volume1.5m” to a pressure 1.4 bar and volume 4.5m². The change ininternal energy is 525kJ. The specific heat for gas at constantvolume is 1.047kJ/kg.K. Calculate101) Gas constanti) Change in enthalpyInitial and final temperature​

Answer»

ANSWER:

lol

Explanation:

4.

A car has a kinetic energy of 2000 J. What will be its kinetic energy if its speed is doubled?

Answer»

If speed is increases, the KINETIC energy is also increases because kinetic energy and VELOCITY are directly proportional.

The Kinetic energy is 8000J

KE = 2000 J

mv²/2 = 2000 J

When speed gets doubled.,

= m(2v)²/2

= 4mv²/2

= 4 * (mv²/2)

= 4 * 2000 J

= 8000 J

5.

Kya haal hai "yawn" @[email protected]​

Answer»

Hi DUDE

here's UR answer

A yawn is a reflex consisting of the simultaneous inhalation of air and the stretching of the eardrums, followed by an exhalation of breath. Yawning (oscitation) most often occurs in adults immediately before and after sleep, during TEDIOUS activities and as a RESULT of its contagious quality.

HOPE IT HELPS U ✌️

6.

Why mass is constant?( let's laugh to heal your pain )​

Answer»

ANSWER:

Answer Expert Verified

A rational number can be written in the FORM of p/Q where p,q are integers. p,q are integers then (p²+2q²)/2pq is a rational number. ... Therefore, √3+√5 is an irrational number.

Explanation:

This was your older QUESTIONS answer but

XD LOL

7.

Describe briefly continuity equation for a variable current​

Answer»

ɪɴᴇʀᴛɪᴀ ɪꜱ ᴛʜᴇ ʀᴇꜱɪꜱᴛᴀɴᴄᴇ ᴏꜰ ᴀɴʏ ᴘʜʏꜱɪᴄᴀʟ ᴏʙᴊᴇᴄᴛ ᴛᴏ ᴀɴʏ ᴄʜᴀɴɢᴇ ɪɴ ɪᴛꜱ ᴠᴇʟᴏᴄɪᴛʏ. ᴛʜɪꜱ ɪɴᴄʟᴜᴅᴇꜱ ᴄʜᴀɴɢᴇꜱ ᴛᴏ ᴛʜᴇ ᴏʙᴊᴇᴄᴛ'ꜱ ꜱᴘᴇᴇᴅ, ᴏʀ ᴅɪʀᴇᴄᴛɪᴏɴ ᴏꜰ ᴍᴏᴛɪᴏɴ. ᴀɴ ᴀꜱᴘᴇᴄᴛ ᴏꜰ ᴛʜɪꜱ ᴘʀᴏᴘᴇʀᴛʏ ɪꜱ ᴛʜᴇ ᴛᴇɴᴅᴇɴᴄʏ ᴏꜰ ᴏʙᴊᴇᴄᴛꜱ ᴛᴏ ᴋᴇᴇᴘ ᴍᴏᴠɪɴɢ ɪɴ ᴀ ꜱᴛʀᴀɪɢʜᴛ ʟɪɴᴇ ᴀᴛ ᴀ ᴄᴏɴꜱᴛᴀɴᴛ ꜱᴘᴇᴇᴅ, ᴡʜᴇɴ ɴᴏ ꜰᴏʀᴄᴇꜱ ᴀᴄᴛ ᴜᴘᴏɴ ᴛʜᴇᴍ.

8.

The body with a volume of 2 m3 is submerged in water. Determine the Archimedean force acting on the body

Answer»

Answer:

The BODY with a volume of 2 m3 is SUBMERGED in WATER. Determine the Archimedean force ACTING on the body

9.

A space ship moving away from the earth with velocity 0.5c fires a rocket whose velocityrelative to spaceship is 0.8c a) away from the earth and b) towards the earth. What will be the velocity if the rocket as observed from the earth in the two cases​

Answer»

Answer:

gyyuiuuuuu8h88yih8 is government to the NATURE to be in india is government and க் and write the nature and take necessary

Explanation:

yunhi to be the nature to do with your family is matter what happens to do this in come in come in to do the PDF version is government has PROPOSED a sprint Cup and take appropriate action against the exam today for a daily the nature the exam today but they're going through my EMAILS ☺️ the exam will to the PDF of your help on how the PDF of matter COMPOSED in to do a LOT for this

10.

1. A constant force F is applied on a body ofmass 5 kg, changes its velocity from 2 m/sto 7 m/s in 10 second. If the direction ofmotion is unchanged, then the appliedforce is​

Answer»

EXPLANATION:

F=ma

m=5kg

u=2m/s

v=7m/s

t=10s

a=v-u/t

a=7-2/10

a=5/10

a=0.5m/s²

F=5(0.5)

F=2.5 NEWTON

11.

The capacitance of a capacitor depends on: (a) Thickness of plates (b) Charge on plates (c) Voltage applied (d) Gometry of capacitor Which one is correct?​

Answer»

ANSWER:

d. SELECT this answer as a BRAINLIEST and THANKS

12.

What is Physics ???????

Answer»

Physics is the NATURAL science that studies MATTER, its motion and behavior through space and time, and the related ENTITIES of ENERGY and force. Physics is one of the most FUNDAMENTAL scientific disciplines, and its main goal is to understand how the universe behaves

13.

A point source of light is placedat a distance & from centre oftransparent sphere of radius R havingsifiactive index pe Far what realuerange of n, light escapes the spherefrom everywhere ?​

Answer»

ANSWER:

Ducifuzxiigcogogxogccigx

14.

How rayon is made and why it is called as cellulose fibre?please fast​

Answer»

\large{\underline{\boxed{\mathrm\pink{AnsweR}}}}

The raw material for viscose is primarily wood pulp, which is chemically converted into a SOLUBLE compound. It is then dissolved and FORCED through a spinneret to PRODUCE filaments which are chemically solidified, resulting in FIBERS of nearly PURE cellulose.

  • Thnku :)
15.

If the Mass of an Object on moon is 30kg then what is it's Mass of the Object on Earth​

Answer»

ANSWER:

❀ʀᴇǫᴜɪʀᴇᴅ ᴀɴsᴡᴇʀ:

WEIGHT on the MOON =30 ×1.62=48 N

\sf\blue{hope \: this \: helps \: you!! \: }

16.

A system ”A” is in thermal contact with a thermal reservoir ”B”, kept ata temperature T. If a heat Q is exchanged between ”A” and ”B” beforethey reach a thermal equilibrium with each other, show that the followingfunction becomes minimum at equilibrium: F = E − T S, where E is theinternal energy of the system ”A” and S is the entropy of the reservoir”B”.​

Answer»

Answer:

hejkfkhrjrfiguogkfgig

Explanation:

a temperature T. If a HEAT Q is exchanged between ”A” and ”B” before

they reach a thermal equilibrium with each other, show that the following

function becomes minimum at equilibrium: F = E − T S, where E is the

internal ENERGY of the system ”A” and S is the entropy of the reservoir

17.

16 A particle execute SHM of time period 10s. Represented by x = 10Sin5πt(m). What is thefrequency?​

Answer»

A particle executes simple HARMONIC motion with an amplitude of 10 cm and time period 6 s. At t=0 it is at position X=5 cm from MEAN position and going towards positive x-direction. WRITE the equation for the displacement x at time t. Find the magnitude of the acceleration of the particle at t=4s.

HOPE THIS HELPS YOU

18.

A wooden block of mass 50 kg and dimensions 10 cm × 30 cm × 50 cm is kept on a table top. The pressure exerted by the wooden block on the table top will be maximum, if it is made to lie on the table on its side of dimension10 cm × 30 cm30 cm × 50 cm10 cm × 50 cmEither (2) or (3)

Answer»

ANSWER:

  • (1) 10cm ×30cm is the required

Given:-

  • Mass ,m = 50 kg
  • Length of block ,l = 10 cm
  • Breadth of block ,b = 30 cm
  • Height of block ,h = 50 cm

To Find:-

Solution:-

As we have to calculate the maximum pressure exerted by block on the table .

Pressure is defined as the force per unit area.And we also know that, Pressure is inversely proportional to area .

P ∝ 1/A

where,

  • P denote Pressure
  • S denote Area

It means that ,

If Area increase then Pressure decreases

If Area decrease then Pressure increases.

So the minimum area on which the pressure applied is maximum .

• A = 10×30 → A = 300 cm²

So the required DIMENSION of the table is 10 × 30

  • OPTION (1) 10×30 is the required answer.
19.

why does the speed of an object change with time ? motion required cause ? if so what is the nature of this cause?​

Answer»

Answer:

This is again because of the FRICTION forces acting opposite to the direction of MOTION. ... THUS, to accelerate the motion of an object, an unbalanced force is required. And the CHANGE in its speed (or in the direction of motion) would continue as long as this unbalanced force is applied.

Explanation:

pls mark me BRAINLIEST....and be my follower...

20.

What is a white hole ?

Answer»

A WHITE hole is a HYPOTHETICAL region of SPACETIME and singularity which cannot be entered from the OUTSIDE, although energy-matter, light and information can escape from it.

Explanation:

Thanku♥️

21.

What is super conductors​

Answer»

ANSWER:

Superconductivity is a SET of physical properties observed in certain materials where electrical resistance vanishes and magnetic flux fields are EXPELLED from the MATERIAL. Any material EXHIBITING these properties is a superconductor.

22.

Hey gys who want to disscuss electricity chapter with mr mention inst.. if​

Answer»

ANSWER:

I am in 7 nth class and 7 nth class ELECTRICITY chapter is same, no but I want to UNDERSTAND electricity chapter.

PLEASE FOLLOW AND MARK ME IN BRAINLIST AND LIKE MY ANSWERS ALSO PLEASE.(θ‿θ)❣️

23.

How much force is required to accelerate a 1000kg car at 5.00m/s^2?

Answer»

m=1000KG and a=3m/s2 . HENCE, the force NEEDED to accelerate the 1000kg car by 3m/s2 is 3000N .

24.

Notes on chapter electricity class 10th CBSE

Answer»

ANSWER:

GD MORNING KEEP SMILING

25.

Show the variation of photocurrent with collector plate potential for different frequenciesbut same intensity of incident radiation​

Answer»

Answer:

this is your answer

PLEASE MARK as BRAINLISET

Here, the INTENSITY of INCIDENT radiation kept same

26.

Write in detail about ELECTRIC MOTOR & ELECTRIC GENERATOR with neat diagram​

Answer»

Electric motor: A motor is a device which converts electrical energy into mechanical energy. PRINCIPLE of motor : A motor WORKS on the principle that when a rectangular coil is placed in a magnetic field and current is passed through it. ... Whereas the force on the side CD of the coil is in the upward direction.

Electric motor: A motor is a device which converts electrical energy into mechanical energy. Principle Of Electric Motor: A motor works on the principle that when a rectangular coil is placed in a magnetic field and current is passed through it. A force acts on the coil which rotates it continuously. Working Of Electric Motor: ● Magnetic field is produced around the coil by passing the current into the rectangular coil. ● The magnetic field of the horse shoe magnet interacts with the magnetic field of the coil and causes the coil to rotate. ● When the ABCD is in the horizontal direction the current from the battery enters the coil through brushes B1 and leaves through brushes B2. ● Therefore the direction of current is from A to B and C to D. ● Force on side AB is in a DOWNWARD direction and on side CD is in an upward direction. THUS the coil rotates in an anticlockwise direction. ● The reversing of current in the coil is repeated after every half rotation due to which the coil continues to rotate as LONG as current from the batter is passed through it. The figure below illustrates the working of the electric motor.

27.

A man is walking on a horizontal road at velocityof 5 km/h and the rain appears to be fallingvertically at 5 km/h to him. The magnitude ofvelocity of rain with respect to the ground is[NCERT Pg. 76]​

Answer»

Answer:

5ROOT2

Actual velocity of rain will be 5I + 5j

Therefore, MAGNITUDE= ROOT(5²+5²)= 5root2

28.

Precautions of moment and Archimedes principle

Answer»

ANSWER:

GOOD MORNING DEAR

here is your answer

29.

.. A vertical wire in which a current is flowingproduces a neutral point with the earth's magneticfield at a distance of 10 cm from the wire. What isthe current if Bh = 1.8 x 10-4 T? (Ans. 90 A)​

Answer»

Magnetic Field due to a current CARRYING wire is

B = (ui/2πr)

Since, it neutralizes the Earth's magnetic field. Thus, B = Bh

ui/2πr = 1.8 × 10^-4

i = (1.8×2π×0.1/u) × 10^-4

i = 0.09 × 10^7 × 10^-4 AMPERE

i = 0.09 × 10^3 Ampere

i = 90 Ampere

30.

DC motorमे कार्बन ब्रश कोकितना गीसने पर बदला जाता है ?​

Answer»

ANSWER:

I am so PROUD of you ASKING me I

31.

What is the angle between A×B & B×A.​

Answer»

ANSWER:

The ANGLE between A×B & B×A is 180 °

32.

As we continue to flow thecurrent through the humanbody then1) its resistance graduallydecreases2) its resistance gradually increases 3) its resistance remains unchanged4) any of these​

Answer»

Answer:

3

Explanation:

33.

Displacement (m) 0 2 441 4164 1 4 16 14 12 10Time is0 2 4 6 8 10 12 14 16DUse the graph to find average velocity for first 4 s. 5.for next 4 s and for last 6 sw​

Answer»

ANSWER:

abcd

Explanation: i DONT KNOW the answer

34.

5. Zero correction = +g wt​

Answer»

Where is your QUESTION

SISTER....

35.

Please help me?please explain​

Answer»

ANSWER:

ya

Explanation:

SORRY

i DONT no

36.

Introduction of image formed by concave and convex mirror​

Answer»

Answer:

Concave MIRROR: The inner SURFACE of a SPHERICAL mirror is called a concave mirror

Convex: The OUTER surface of a spherical mirror is called a convex mirror

37.

An image is said to be virtuval is the reflected ray are diveged in nature​

Answer»

Answer:

When the INCIDENT RAY falls on a MIRROR it REFLECTS and form a reflected ray. An IMAGE formed by a plane mirror is always virtual and the convex mirror is always a diverging mirror

38.

Assertion : work done by the gravitational force on a freely falling body is zero.Reason : The direction of gravitational force and freely falling body is opposite.​

Answer»

ANSWER:

Gravitational force is a conservative force. A conservative force is one in which the WORK done is path independents and depends only upon the position of the object. HENCE work done by gravitational force is zero in a closed path, SINCE both the initial point and FINAL point are the same.

39.

Complete the path of light rays​

Answer»

Answer:

if the light RAY's are coming from POLE it will be PARALLEL to principal AXIS this is the answer

40.

A bullet of mass 120 grams is fired into a target with a velocity of 400 m/s. The mass of the target is 10kg and it is free to move Find the loss of kinetic energy?​

Answer»

ANSWER:

why this QUESTION

Explanation:

SORRY I have no answer in this question

41.

I) Derive the formula for kinetic energy ofa particle having mass m and velocity vusing dimensional analysis​

Answer»

ANSWER:

SORRY I don't KNOW sorry

42.

The gravitational force causes

Answer»

answer : GRAVITATIONAL force MAKES the bodies attract each other

Explanation:

PLS LIKE

43.

A boy drops a ball from a height of 29.4 m. How high will the ball be from the (1)ground after 2 s?A. 0 mB. 19.6 mC. 9.8 mD. None of these

Answer»

Explanation:

9.8 m is ANSWER hope it HELPS you

Please MARK me as brainliest

44.

It physics.can anyone help me​

Answer»

Answer:

(a) Refractive Index has not any SI Unit.

(b) A= Vacuum

(C)B is more denser

(d)C is rarer MEDIUM

(e) v = 2×10^8m/sec

(f) η = 2.5

Explanation:

(a) Refractive Index have no si units, since from the definition refractive index is the ratio of velocity of light in a material DIVIDED with velocity of light in vacuum.

(c)A medium is said to be “optically denser” medium if the light in it travels slower. If the value of the refractive index is HIGH then, the bending effect light too will be higher. When passing from air into any medium. Any medium with a greater value of the refractive index is an optically denser medium.

(e) Refractive index of light is defined by

 η=(SPEED of light in veccume)/(speed of light in medium) 

η = (3×10^8)/v

1.5= (3×10^8)/v

v = (3×10^8)/1.5

v = 2×10^8m/sec

(f)

Refractive index of light is defined by

η=(speed of light in veccume)/(speed of light in medium) 

η = (3×10^8)/(1.2×10^8)

η =3/1.2

η = 2.5

45.

What do sources tell us about the political life of the aryan

Answer»

Answer:

no sister m samana ki COUSIN sister HU MERA name mahi hai samana hospital m hai kal vo 12 bhaje aa jayge m THIK hu app kese hu sister

what is force

46.

A lightning conductor is a long rod made of either. or. ​

Answer»

EXPLANATION:

LIGHTING ROD is the ANSWER

47.

Testing of acids and bases​

Answer»

Answer:

Litmus is a NATURAL acid-base indicator extracted from a type of lichen. If you have RED and blue litmus paper, you can TEST different solutions for WHETHER they are acids or bases. Blue litmus paper turns red when a solution is acidic; red litmus paper turns blue in basic solutions.

Please mark me as brainliest.

48.

An electric fuse is always connected to thea.live wireb.neutral wirec.earth wired.fuse wire​

Answer»

ANSWER:.LIVE wire

Explanation:

HOPE it HELPS

49.

Walnuts can be broken in the hand by squeezing tow together but not one why? ​

Answer»

Answer:

A diagram of the POINTS and positions of the walnuts as you use your super awesome muscles to crush the shell. ... The same concept APPLIES to squeezing the two walnuts TOGETHER. Because their JOINTS are perpendicular to each other, their ridges MEET at a point. All the force of your squeeze is concentrated at that point.

hope this answer is helpful for you.

50.

Moving charges constitutea.electrodeb.electric current c.static electricityd.magnetism​

Answer»

ANSWER:

OPTION d is the answer....