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.

Explain how a rocket works.​

Answer»

Rockets work on the principle of Conservation of Linear Momentum and Newtons Third Law of Motion. EVERY action has an equal and opposite reaction. When liquid/ gas is pushed out of the rocket, the rocket gets pushed forward.PLS MARK AS BRAINLIEST THANK U HAVE A NICE TIME

2.

Pls can anyone answer this the answer is option d , I need explanation. ​

Answer» HELPS you。◕‿◕。
3.

A 50 kg block is attached to mass M using string which is passing over a smooth pulley as shown in figure . Determine the range of mass M that will keep the block in equilibrium.Assume us = 0.30​

Answer»

tion:use the FORMULA T- mg(sin(30)+cos(30))=0 for CALCULATING the UPPER extreme

4.

a ball is thrown horizentallyfrom a point A travellsalong straight line strikes&to wall-to-wall a point and rebounds back​

Answer» WAIT ANSWERING you have to wait then only you can GET this OK wait TELLING wait wait wait
5.

a car accelerates from 15 metre per second to 2.5 metre per second in 10 seconds calculate the acceleration and the distance covered by the car​

Answer»

u=15m/s v=2.5m/s t=15 SECONDS to FIND ACCELERATION....a=v-u/ta=-1.25m/s²to find DISTANCE ......s=ut+1/2at²s=15×10+1/2×-1.25×10×10s=150+(-62.5)s=87.5mhope it HELPS.....

6.

the area where air particles are pulled apart:. a.compression b.reflection c.rarefaction d.dispersion​

Answer»

rarefactionExplanation:A RAREFACTION is a region within a medium in which particles of that medium are pulled apart or spread out. The DIAGRAM shows a SNAPSHOT at one instant in time of the particles of air within the tube. The expected pattern of alternating compressions and RAREFACTIONS is observed within the tube.

7.

Observe the above v-t graph and answer the following questions . 1. What type of motion the object is having up to 3 seconds? 2. What type of motion the object is having from the end of 3 second to 5 seconds 3. What type of motion the object is having from the end of 5 seconds to the end of 8 seconds? 4. During what time the object has (a) positive acceleration (b) negative acceleration (c) zero acceleration? 5. Calculate the distance travelled by the body from the end of 3 seconds to the end of 5 seconds?​

Answer»

1.uniformly ACCELERATED motion since slope of v~t graph is a straight LINE having positive slope2.uniform motion since slope of v~t graph is zero3.uniformly retarded motion since slope of v~t graph is negative4.(a)0 to 3 second as slope is +ve(B)5 to 8 second because slope is -ve(c)3 to 5 second because slope is ZERO5. between 3 to 5 second acceleration is zero so it is uniform motionHence distance traveled by the body in this interval is given by ,Vt=30×2=60m

8.

Sis itz the name of our frnd circle .....heer u also added​

Answer» PLZZZ like my answer Mark me as BRAIN LIST plzzz,,
9.

Given R1=5ohm, R2=4 ohm, R3=2ohm, R4=6ohm, R5=8ohm.Find the approximate overall equivalent resistance​

Answer»

I HOPE I HAVE ANSWER YOUR QUESTION CORRECTLYPLS MARK ME AS BRAINLIEST

10.

Please answer this question with proper explanation... no spam..... ✌️​

Answer» USE the FORMULA of VELOCITY it will HELP to do the ANSWER
11.

What is a projectile ? show that its path is parabolic. Also find the expression for : 1} Maximum Height and 2) Time of flight.​

Answer»

♤A body or object upwards at an angle theta other than 90° with horizontal is called projectile. ♤Let projectile is thrown with a INITIAL VELOCITY u at an angle theta there with horizontal. This equation represents equation of PARABOLA. Hence path of projectile(TRAJECTORY) is a parabola.Explanation:Hope it helps u dear...

12.

6. Two boxes A and B of weight 250 N and 150 N respectively are placed on an inclined surface as shown in figure 6. Determine value of a so that motion of boxes impends down theplane. Assume coefficient of static friction between block A and inclined surface as 0.30 andbetween block B and inclined surface as 0.20​

Answer»

A = Tan^-1 (0.3) downward F ALONG incline 《 FRICTIONAL Resistance FORCE CAUSED by STATIC Frictionmg sin theta 《 Mustatic x mg Cos Theta ( mg cos Theta is Normal Formal force from incline )Tan A 《 Mu = 0.3A = Tan^-1 0.3

13.

Boats and ships are floating objects explain in short​

Answer»

An object will float if the GRAVITATIONAL (downward) force is LESS than the buoyancy (upward) force. So, in other WORDS, an object will float if it WEIGHS less than the AMOUNT of water it displaces.

14.

To every action , there is an ______ & _____ reaction .​

Answer» OPPOSITE and EQUAL REACTION
15.

What is the Formula of Force ?​

Answer» F=ma EXPLANATION:where F is FORCE m is MASS and a is ACCELERATION
16.

A substance having density of 6g/cm3 has a mass of 48gwhat itsvolomeis​

Answer» MULA for DENSITY is d = M/V, where d is density, M is MASS, and V is VOLUME.
17.

Find the cost of laying grass in a triangular field of sides 50 m, 65m, 65m, at the rate of ₹7 per m square ​

Answer»

━━━━━━━━━━━━━━━━━━━━ Sides of triangular FIELD = 50m, 65m and 65mTo find:-The cost of lying grass at the RATE of 7 Rs PER m²★ Using heron's Formula:-Firstly we need to find SEMI - perimeter (S)★Perimeter (P) of ∆ = (a + b + c)= (50m + 65m + 65m)= 180mTherefore, Semi - perimeter:- Semi perimeter = 90m Now,★ Cost of lying grass will be = AREA × Rate━━━━━━━━━━━━━━━━━━━━━━━━━━━

18.

Hlo guys..... . . Define gelatin..No spamm ​

Answer»

Gelatin means a VIRTUALLY COLOURLESS and tasteless water-soluble protein prepared from COLLAGEN and used in food preparation, in photographic processes, and in glue.Explanation:HOPE it's helpful to u

19.

Column 1 Column 2 a) Spirogyra i.Fermentation b) Paramecium ii. Penicillin c) Alexander Fleming iii. Protozoa d) Louis Pasteur iv. Algae

Answer» RA —> Algaeparamecium —> protozoaAlexander FLEMING —> PenicillinLouis PASTEUR —> FERMENTATION
20.

What is third law of newton force​

Answer»

third law STATES that for EVERY action (force) in NATURE there is an equal and opposite reaction. In other words, if object A exerts a force on object B, then object B also exerts an equal and opposite force on object A.Explanation:its my pleasure to help you.please MARK me as a brainliest

21.

Significant force without any considerable change in the length of the moments

Answer»

There are times that we perform actions that do not require the movement of the MUSCLES. This is called Isometric contraction. In Isometric Contraction; ... -there is no lengthening or contraction of the muscle fibers.Explanation:PLEASE MARK BRAINLIST ANSWERS AND FOLLOW ME PLEASE

22.

Lim teta→0 sin m square teta/teta equal to

Answer»

0Explanation:I am taking thetha as x for convenience= lim (x to 0) (Sin²x)/(x)= lim. (x to 0) (sinx)/(x) * (sin x)= lim (x to 0)( sinx)/x) × (lim x to 0) sinx. (we can seperate because sinx is continuous through the LIMIT)= 1 × 0 = 0(OR)lim x to 0) (sinx)/(x)is 0/0 indeterminate, so we can use L'Hopital RULE,= (lim x to 0) (2 sinx cos x)/1)= 0HOPE IT HELPED YOU!MARK THIS AS BRAILEIST IF IT REALLY HELPED YOU!

23.

State at least two applications of total internal reflection.

Answer» 1. OPTICAL fibres2.Brilliance of DIAMONDS
24.

Home work... Derive expression for the velocity of a car moving on a banked road.

Answer» PE I HELP you PLZ FOLLOW me
25.

in period 2, element X is to right of element Y . find which of the element have these properties i) low nuclear charge. ii) low atomic size III) high ionization energy. iv) high electro negativity. v) more metallic character​

Answer» HIGH ELECTRO negativityHope it HELPS MARK me as BRAINLIST
26.

The dimenssion of Displacement​

Answer» LIS DIMENSION of displacementExplanation:It has STRAIN QUANTITY
27.

Can anybody explain the theory of relativity​

Answer»

The theory of relativity usually encompasses two interrelated theories by Albert Einstein: special relativity and general relativity. Special relativity applies to all physical phenomena in the absence of gravity. General relativity explains the law of gravitation and its relation to other forces of nature. It applies to the cosmological and astrophysical REALM, including astronomy. The theory TRANSFORMED theoretical physics and astronomy during the 20th century, superseding a 200-year-old theory of mechanics created primarily by Isaac Newton. It introduced concepts including spacetime as a unified entity of space and time, relativity of simultaneity, kinematic and gravitational time dilation, and length contraction. In the FIELD of physics, relativity improved the science of elementary particles and their fundamental interactions, along with USHERING in the nuclear age. With relativity, cosmology and ASTROPHYSICS predicted extraordinary astronomical phenomena such as neutron stars, black holes, and gravitational waves.

28.

A uniform metre rule rests horizontally on a kn edge at the 60 cm mark when a mass of 10 gsuspended from one end. Draw a diagram of thearrangement.(a) At which end must this mass be suspended ?(b) What is the mass of the rule ?(c) The 10 g mass is now shifted to the 90mark. In which direction must the knife edgebe shifted to make the rule horizontal again?"Please give reason for every step."​

Answer»

tion:Let M gram be the mass of the rule. Since density of the rule is UNIFORM, its weight Mg will act at its middle POINT i.e., at the 50 cm mark (Fig.).The weight of the rule produces an anti-clockwise moment about the knife-edge O. In order to balance it, 10 gram mass is to be SUSPENDED at the end B, to produce a clockwise moment.From the PRINCIPLE of moments,Anti-clockwise moment = Clockwise momentMg × (60 – 50) = 10 g × (100-60)or Mg × 10 = 10 g × 40∴ M = 40 gram

29.

1st law of motion is also known as __________ .​

Answer»

Galileo's Law of INERTIA states that; if no net force acts on an OBJECT, the object maintains in the same state of motion. ... This is a restatement of Newton's First Law of Motion.......please MARK as BRAINLIEST ANSWER AND FOLLOW ME PLZZZZZZZ PLZZZZZZZ PLZZZZZZZ........

30.

7 which of the following is not correct? [ ] A) calciumoxide & water - Calcium hydroxichBy hydrogen & oxygen> waterC)calcium oxide---->water+calcium hydrooxid D) all the above​

Answer» TION:A I THIK so... is it OK...???
31.

the velocity of a particle moving along a straight line as a function of time is given by v=3-2r.find the acceleration of the particle​

Answer»

The velocityof a PARTICLE moving ALONG straight line is GIVEN in terms of timeaswhereis in seconds ANDIS in.
The DISTANCE travelled by particle fromtoseconds is

32.

What do you mean by density? how it is calculated what is its unit ​

Answer»

Density, MASS of a unit volume of a material SUBSTANCE. The formula for density is d = M/V, where d is density, M is mass, and V is volume. Density is COMMONLY expressed in units of grams per cubic centimetre. ... Density can also be expressed as kilograms per cubic metre (in MKS or SI units).Explanation:please mark me as brainliest and THANKS me please

33.

QUESTION ___________________________Define potential energy??? ____________________________ Harsh & Lavanya ​

Answer»

al ENERGY is the energy that is stored in an object DUE to its position relative to some ZERO position.

34.

What is the symbol of Momentum ?​

Answer»

the SYMBOL of momentum is "P"EXPLANATION:this may help you please follow me and give thanks

35.

•d. A stone thrown vertically upwards withinitial velocity u reaches a height 'h'before coming down. Show that thetime taken to go up is same as the timetaken to come down.If the value of a suddenly becomes twice​

Answer»

When stone throw upward with initial VELOCITY, uFinal velocity at maximum height, v=0Apply kinematic EQUATION of motion.v=u+att= av−u = −g0−u Apply kinematic equation of motion.s=ut+ 21 at 2 h=u( gu )− 21 g( gu ) 2 u= 2gh TIME,t= gu = g2gh t= g2h ........(1)(ii) When stone drop from height hApply kinematic equation of motion.v 2 −u 2 =2ghv= 2gh Apply kinematic equation of motion.v=u+att= av−u = g2gh −0 = g2h .......(2)From (1 ) and (2) it is PROVED that the time taken to go up is same as the time taken to come down. Explanation:hope its helps

36.

What is the reason for during a pole vault jump the impact ,is reduced by falling on a foam bed ​

Answer»

This is done to PREVENT INJURY to the athlete when he falls down after making a high jump. ⇒When he falls on a a soft LANDING site[EITHER cushion or sand], then the jumper takes a longer time to come to stop.hope my ANSWER helps you please follow me and mark me as brainalist....

37.

What is average speed =?​

Answer» SPEED =Speed=distance/time
38.

You are kite-surfing and tour kite is pulling your kite is pulling you upwards at an angle of 60 degree with respect to the ocean , with a force of 1200 N . What component to the force is up? How much of it is sideways , parallel to the water?​

Answer»

In general, a wind speed of 10 to 18 knots is IDEAL for practicing kitesurfing. Once a KITE is launched, it will remain at an ALTITUDE in which all of the forces are balanced. If you pull on the kite's LINE, you can increase the velocity of the kite and thus increase its LIFT.

39.

Correct the following if any a. kilogram/cubic metreb. 9m 50 cmc. distance is a scalar quantityd. displacement will be always more than the distance​

Answer» DISTANCE is a scalar QUANTITY because has only magnitude without any DIRECTION.
40.

Define one Newton force .​

Answer»

ion. One newton is the force needed to ACCELERATE one kilogram of mass at the rate of one METRE PER second SQUARED in the direction of the APPLIED force.

41.

Explain the concept of volume and density? ​

Answer» PLS MARK ME AS BRAINLIEST PLS AND HAVE A NICE TIMEExplanation:Density is mass PER volume. When you see the word “per” it always means “divide.” So to CALCULATE the density, we divide the mass by the volume. Mass is measured in grams, and volume is measured in cubic centimeters, so density is usually expressed in grams per cubic centimeter, or g/cm3.
42.

A particle performing linear SHM at amplitude of 8cm and period at 45. find the time taken by the describe a distance at 2cm from the positive extreme position​

Answer»

AS BRAINLIST ANSWER !!

43.

Describe an aexample to verify archimedes principle​

Answer» TION:The WATER which overflowed when solid was immersed is collected in the cylinder placed ' below the overflow tube. ... It is found that W1 - W2 loss in weight of solid when immersed in water is equal to the weight of the water DISPLACED by the body. This verifies ARCHIMEDES' principle.
44.

derive an expression for the kinetic energy of a body which starts from rest and acquires a velocity undr the action of constant force​

Answer»

Derivation: LET us consider an object of mass " m " which is at rest on smooth horizontal plane. Let a Force , F acts on the object and let the object from rest MOVES from point A to point B and COVERS a displacement S. ... The WORK DONE appears as kinetic energy of the body.

45.

Σ 4re.उदाहरण 3.1 एक स्थान पर विद्युत विभव -15 वोट ,तथा किसी दूसरे स्थान पर विद्युत विभव V वोल्ट है।कूलॉम आवेश को पहले स्थान से दूसरे स्थान तक ले जाने ।जूल कार्य करना पड़े तो V का मान ज्ञात किजिये।इलः यहाँ,--15 वोल्ट, w%3D1503V=P बोल्ट 360W1.-1​

Answer»

didn't UNDERSTAND in HINDI

46.

Light enters from air to glass having R.I=1.5 what is the speed of light on glass

Answer» SPEED of LIGHT in GLASS is VG= c/nVg=3*10^8/1.5 =2*10^8m/s
47.

What is derived units? write two examples​

Answer»

The SI has special names for 22 of these derived units (for example, hertz, the SI UNIT of measurement of frequency), but the rest merely reflect their derivation: for example, the square METRE (m2), the SI derived unit of area; and the kilogram per cubic metre (kg/m3 or kg⋅m−3), the SI derived unit of density.Explanation:plzzz mark me BRAINLIST.....

48.

Origin of crystal defects

Answer»

Crystal defect, imperfection in the regular geometrical arrangement of the atoms in a crystalline SOLID. These imperfections result from DEFORMATION of the solid, rapid COOLING from high temperature, or high-energy radiation (X-rays or NEUTRONS) striking the solid.There are two DIFFERENT types of substitutional defects: Isovalent substitution and aliovalent substitution. Isovalent substitution is where the ion that is substituting the original ion is of the same oxidation state as the ion it is replacing.

49.

The minimum didtance from real object to real image in a concave mirror is

Answer» MINIMUM DISTANCE between an object and its real image in the CASE of a concave mirror is ZERO
50.

The plane mirror is used in the meters to a Avoid the error of parallax b Help to take more accurate observations c Reflected light makes the scale illuminated d Make the meter look good

Answer» REFLECTED LIGHT MAKES the SCALE ILLUMINATED