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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 6301. |
If k. E of a body increase by 100 % how much % of momentum will increased |
| Answer» Kinetic energy = p^2/2m If the momentum increases by 100% , then the p increases to 2p.Substitute p =1K before increase in momentum = p^2/2m = 1/2m - (1)K\' after increase in momentum by 100% = 2p^2/2m= 4/2m - (2)Let p = 1\xa0Divide (2) by (1) and substitute p=1K\'/K = (4/2m) / (1/2m) = 4 ( 2m gets divided by 2m to give 1) K\'= 4K ( cross-multiplication)Percentage increase = (K\'-K / K) * 100 = (4K-K/K) *100 = (3K /K)\xa0*100 = 3*100 = 300%When momentum of a body increases by 100% then its kinetic energy will increase by 300%. | |
| 6302. |
Diffrence between zero acceleration and constant acceleration |
| Answer» Zero acceleration simply means there is no change in velocity with time and no change in velocity means neither its magnitude is changing nor the direction.Whereas constant acceleration say for example g=9.8m/s^2 shows the change in velocity with time (either its speed or direction). As an example when an object falls acceleration due to gravity is g in downward direction always , it acts because the speed of the freely falling object increases, direction being same though in this case ie downwards. Similarly when an object is thrown in vertical direction the speed decreases and eventually becomes zero at the topmost point and here also due to change in its speed acceleration g which is constant is there in downward direction. | |
| 6303. |
If someone has any doubt he or she can contact on Instagram id: prabh_singh_16 |
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Answer» Same .PLEASE NIHAAL CAN YOU GIVE ANSWERS 9F MY QUESTIONS ON THIS APP Same here I have so many doubts sir but i have no instagram id |
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| 6304. |
Important concepts of chapter7 System of particles |
| Answer» You can check on thishttps://mycbseguide.com/cbse-revision-notes.html | |
| 6305. |
Please explain your answer |
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| 6306. |
Dimensions of pressure |
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Answer» Welcome Dimension of pressure . P= Force / area =[ML-1T-2] Ml -1 T -2 D of the force= MLT-2 & D of the area = L2 ::: # D of pressure = ML-1 T-2 Answer |
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| 6307. |
How many unit in physics in half yearly |
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Answer» Unnati I\'m also in dav school Hamare school m to units and measurements, vectors motion in straight line, projectile, work power and energy, centre of mass half aaega Only 5 chapters will come in govt. schools In my school BR DAV only 6 chapters were come There are too many units in physics bro but don\'t worry learn them concept wise and u will easily get ur answer |
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| 6308. |
Show that newton\'s second law of motion is the universal law of motion |
| Answer» If force acting on a body is f then from Newton second law f=ma. If f =0 then a is also 0.It means if no force acting on a body then the body continues to be at rest or moving with uniform velocity. This newtons first law of motion. Now, if two body\'s is in contact then two force acting on it one is gravitational force and second is normal force. Fab=dpa/dtFba=dpb/dtAdding both equation Fab +Fba=d(Pa+Pb) /dtFab+Fba=o because there is no change of velocity in body. So, Fab= - FbaThis is Newton third law of motion. | |
| 6309. |
applications of dimensional analysis |
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Answer» Dimensional Analysis is a very basic aspect of measurement and has many applications in real life physics. We use dimensional analysis for three prominent reasons, they are: Consistency of a dimensional equation. There are four applications of dimensional analysis :1. To convert a physical quantity from one system to another. 2. To check the correctness of any formula for any physical quantity 3. To determine the dimensions of dimensional constant 4. To derive a physical quantity dimensionally In finding dimension we use length time mass as basic unit which are used in replacing unit Dimensional Analysis is a very basic aspect of measurement and has many applications in real life physics. We use dimensional analysis for three prominent reasons, they are:\t\tConsistency of a dimensional equation\t\t\tDerive relation between physical quantities in physical phenomena\t\t\tTo change units from one system to another\t |
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| 6310. |
What is the weight of a body falling freely under gravity |
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Answer» Mass of body + 9.8 Weight of body is -9.8m/s^2 |
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| 6311. |
What r physical quantities? |
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Answer» Quantity which can be measured Characteristics of nature which can be measure directly or indirectly and obey the some rule of physics are called physical quantity Quality which can be measured are called physical quantity Combination of magnitude and unit is called physical quantities |
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| 6312. |
How to solve a problem with component method? |
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| 6313. |
Unit -5 |
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Answer» What ?????????????? What does this mean |
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| 6314. |
Define 1N force |
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Answer» We define one newton as that force which\xa0when acting on a mass of 1 kg produces in it an acceleration of {tex}1m/s^2{/tex}\xa0in its own direction.{tex}1 N=1 kgm/s^2{/tex} If a body is moving with acceleration of 1 m/sec square and having mass 1kg by any force is known as 1 Newton 1 newton force is a force that caise an acceleration of 1m/sec2 to a body of mass 1 kg One Newton is 1 kilogram meter per second square. It is the SI unit of force. It is the force needed to accelerate a mass of 1 kilogram by 1 m/s2 in the direction of the applied force. |
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| 6315. |
Define laws of motions |
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Answer» Newton\'s three laws of motion\xa0may be stated as follows:\tEvery object in a state of uniform motion will remain in that state of motion unless an external force acts on it.\tForce equals mass times acceleration [ f (t) = m a (t) ].\tFor every action there is an equal and opposite reaction. Laws of motion is also known as Newton\'law of motion.They are follow :1. Every body in universe try remains to be in its state untill a exertrnal force act on it.2. The change in momentum is directly proportional to applied force. 3. Every action has equal and opposite reaction |
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| 6316. |
Derive the formula fir kinetic energy using the method of calculus |
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| 6317. |
under what condition the average velocity equal to instantaneous velocity |
| Answer» At (0)average velocity and instantaneous velocity is same because the acceleration of a body is equal to zero and there is no Changing of direction and speed | |
| 6318. |
Definition of scalar vector and it\'s type with SI unit |
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Answer» Hey Yogita hello \tScalar Quantities: The physical quantities which are specified with the magnitude or size alone are scalar quantities. For example, length, speed, work, mass, density, etc.\tVector Quantities: Vector quantities refer to the physical quantities characterized by the presence of both magnitude as well as direction. For example, displacement, force, torque, momentum, acceleration, velocity, etc. Hey Kulwinder where are u from? Please tell because I think i know u. It\'s Si unit is m/s2 It is a vector which have only magnitude . |
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| 6319. |
Why there is no availability of new blueprint question paper |
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| 6320. |
What is inertial frame of refrence |
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| 6321. |
When will our result come??How much marks onwards will merit list start?? |
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Answer» Absolutely sure Above 80% are you sure Above 80% about merit list in my opinion should above 90% i wish on 30th of May |
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| 6322. |
Where is Rayoptics chapter in physics |
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| 6323. |
What is centripetal acceleration. |
| Answer» when an object move in a circular path it changes it\'s velocity I.e acceration. this acceleration is called as centripetal acceleration | |
| 6324. |
What is the integration of COS 2x |
| Answer» Sin2x/2 | |
| 6325. |
Did we cannot do physics aur chemistry without taking maths as a subject?? |
| Answer» No it is not true. We perform better in physics and chemistry if we study maths in high school. | |
| 6326. |
Which publication is Best for physics |
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Answer» Pradeep S.l arora of dhanpat publication or basic concept of physics of H.C verma |
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| 6327. |
How we find the mean absolute error |
| Answer» First you should measure all the absolute errors and find there sum and then divide the result by the total no of absolute error. You will get the answer.... GOOD LUCK.... | |
| 6328. |
If ball is thrown downward what type of A/t and s/t graph are form |
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| 6329. |
Why force |
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| 6330. |
MAGENTA RIDDIM |
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| 6331. |
What is the coefficient of thermal conductivity. Write it\'s unit? |
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Answer» The coefficient of thermal conductivity is “k”,Unit is w/m-k. Wst |
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| 6332. |
i want to know the result date for class 10 |
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Answer» 30 may till now? as per cbse 30 may 30 may 28 may |
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| 6333. |
10 classcbse |
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Answer» Hello Mehak please ask a proper question because you just mentioned 10 class cbse. Do you want result date?? Result date??? What are you asking for |
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| 6334. |
Is result date confirmed?? |
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Answer» yes 30 may is confirmed Nope the result date is not confirmed by CBSE .It is said that class 12th results will be out on 26th May .But there is a chances that 10th results will be nearly the 1st week of June . I think it will be 28 Nhi 30 confirm hai 26 |
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| 6335. |
if y=at^2 , x=2at where a is constant then dy/dx at x=1/2 is what? |
| Answer» dy/dt =a2t. dx/dt=2a thus dy/dt ×dt/dx = t | |
| 6336. |
Some important notes on differentiation and integration of class 11 |
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| 6337. |
When the result of class 10th will be out? |
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Answer» on 30th of may and it is confirmed Thanks for telling B/w 25 may to28 may |
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| 6338. |
If two vectors A and B are such that a + b is equal to a minus b then the angle between a and b is |
| Answer» The angel is of 90 degree bcoz insuch type of cases a parrallelogram is formed | |
| 6339. |
What are errors |
| Answer» it is the uncertainity in the measurement of any physical quantity | |
| 6340. |
Find dy/dx. y=√x |
| Answer» D (x1/2)÷dx1/2xpower -1/2 ans | |
| 6341. |
What is the difference between em and gravitational force |
| Answer» gravitaional force-(i) It posses mass.(ii)it is internal force. electromagnetic force-(i) Itis exerted by magnet.(ii) it produce magnetic waves . | |
| 6342. |
Why electrons of an atom does not attract to nucleus |
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Answer» Yes Due to em force |
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| 6343. |
Calculas method how to derived |
| Answer» Calculus has many equations or you can say formulas , so it consist of lot of derivations .... Go through NCERT , whatever derivations you need , you can find in the book itself or in reference books too . | |
| 6344. |
What is a polaroid |
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| 6345. |
When result was going to be declare |
| Answer» May be 28 may | |
| 6346. |
What is dimension? |
| Answer» DIMENSIONS IS A QUANTITY OF POWER BASIS UNIT Of the QUANTITY | |
| 6347. |
What\'s. Second . Law of Newton |
| Answer» Based on acceleration | |
| 6348. |
Weak nuclear force |
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| 6349. |
What is differentiation??? |
| Answer» Geometrically it is the slope of tangent | |
| 6350. |
Entropy,entropy infinity, emergent fulx,I,E,L relation KE and angular momentum |
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