InterviewSolution
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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your Class 11 knowledge and support exam preparation. Choose a topic below to get started.
| 501. |
Integrate cos (4x+3)dx |
| Answer» I\'m sry I posted wrong answer... I solved it again and the correct ansr is :-#1/2 sin(4x+3).... It\'s obviously right... Sry for wrong one..<br>2sin(4x+3) / 4x²+3x.. | |
| 502. |
Convert 1 parsec into 1AU |
| Answer» | |
| 503. |
Physics is hard or not |
| Answer» No...<br>The answer seems to be different for different students. But according to my point of view if you donot only mug up things but understand carefully about the whole physical phenomena then it becomes very easy. For learning something you must see it around you. And as you know we are very fortunate because physics is going on continuously around us. So i want to say that feel the subject then i will assure you that you would surely love physics. | |
| 504. |
F(x)=x^3,g(y)=y-1,h(z)=z+1. F(g(h(x)))= |
| Answer» | |
| 505. |
A small steel ball of radius |
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| 506. |
Describe unit. |
| Answer» Unit means one... | |
| 507. |
Let A= 5 +- 0.5 and B=2+- 0.25. Calculate A+B and A-B |
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| 508. |
Briefly explain parallax method. |
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| 509. |
What is a unit vector? |
| Answer» Vector have both direction and magnitude. And the magnitude is 1<br>A unit vector is a vector of unit magnitude and a particular direction.\tThey specify only direction. They do not have any dimension and unit.\tIn a rectangular coordinate system, the x, y and z axes are represented by unit vectors, î,ĵ andk̂\tThese unit vectors are perpendicular to each other.\t|î| = |ĵ | = |k̂| = 1<br>Vector whose magnitude is 1 | |
| 510. |
How is physics an exciting subject |
| Answer» ???????<br>Ha ha just relate physics with day to day activities.. | |
| 511. |
Cosx/1+e^2x |
| Answer» - sin x + e^2x × 2 | |
| 512. |
When will class 10 board result declare? |
| Answer» 18 may | |
| 513. |
what is meant by the general motion of a rigid body |
| Answer» | |
| 514. |
Numericals based on motion in 1d |
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| 515. |
Y=x+1/x^2 then dy/dx=what |
| Answer» -1/x^2 - 2/x^3 | |
| 516. |
what is called differentiation |
| Answer» Dividing up an equation | |
| 517. |
When ntse result come |
| Answer» | |
| 518. |
When will board result declare |
| Answer» No aish....in third week of may<br>In first week of may | |
| 519. |
Explain and formulate total energy of a satellite and binding energy of a satellite |
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| 520. |
Find out excess of pressure inside a liquid drop |
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| 521. |
State and prove parallel axes theorem |
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| 522. |
State and prove principle pf conservation of linear momentum |
| Answer» Principle of Conservation of Linear Momentum. The principle of conservation of linear momentum states that, If no external forces act on the system of two colliding objects, then the vector sum of the linear momentum of each body remains constant and is not affected by their mutual interaction. | |
| 523. |
class 11 important derivations |
| Answer» | |
| 524. |
Why sky are blue |
| Answer» It is just because of the scattering of the light.Sun rays coming from the sun gets a scattering of most of the blue light as the blue light has the shortest wavelength due to it scatters most.(The air has colloidal particals in it.) | |
| 525. |
Why are rain drops always spherical? |
| Answer» Raindrops take up the spherical shape due to the surface tension of water which is caused due to the tendency of water molecules to stick together. The spherical shape is having the least possible surface area due to which it can resist any of the external force in the atmosphere. | |
| 526. |
Law of constant proportion |
| Answer» \tThe law states that in a chemical substances the elements are always present in a definite proportion by mass. It is also termed as law of definite proportion.\tFor instance, the ratio of hydrogen and oxygen in water obtained from any source is 1:8 i.e. 1g of hydrogen and 8g of oxygen together make up 9g of water.\tSimilarly the ration of nitrogen and hydrogen in ammonia is 14:3. | |
| 527. |
What is physical unit definition? |
| Answer» Standard measure of a physical quantity is called physical unit. | |
| 528. |
What\'s the best book to prepare for jee mains and advanced??? |
| Answer» You can even try DPPs from Kota. DPP-Daily Practice Papers.<br>Ncert +ncert exampler +hcv +pyqb<br>Yes | |
| 529. |
Mathematical tools of physics |
| Answer» | |
| 530. |
What r gluons |
| Answer» Gluon, the so-called messenger particle of the strong nuclear force, which binds subatomic particles known as quarks within the protons and neutrons of stable matter as well as within heavier, short-lived particles created at high energies. Quarks interact by emitting and absorbing gluons, just as electrically charged particles interact through the emission and absorption of photons.<br>It is an elementary particles | |
| 531. |
Why are rain drops always spherical |
| Answer» Raindrops take up the spherical shape due to the surface tension of water which is caused due to the tendency of water molecules to stick together. The spherical shape is having the least possible surface area due to which it can resist any of the external force in the atmosphere.<br>It is mostly not always<br>Answer speak now | |
| 532. |
Define work . Explain its types with example? |
| Answer» Work is said to be done when a force applied to an object moves that object. The SI unit of work is the joule (J) . We can calculate work by multiplying the force by the movement of the object. W = F × dPositive Work\t\xa0If a force displaces the object in its direction, then the work done is\xa0positive\tSo, W=Fd\tThe example of this kind of work done is motion of ball falling towards ground where displacement of ball is in the direction of force of gravity.Negative work\tIf the force and the displacement are in opposite directions, then the work is said to be\xa0negative.\tFor example if a ball is thrown in upwards direction, its displacement would be in upwards direction but the force due to earth’s gravity is in the downward direction.\xa0 | |
| 533. |
Sand is spread on tracks covered with snow Why |
| Answer» When the roads (dr tracks) are covered with snow then there is considerable reduction of frictional force between the tyres of the vehicle and the road (or between the track and the wheels of the train) which leads to the skidding of the vehicles. Thus, driving is not safe. When sand is thrown on the snow covered tracks or roads then the force of friction increases, so safe driving is possible . | |
| 534. |
Expalin and derive the launching oof satellite |
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| 535. |
we know that gravitational force is attractive in nature so why planets and sun do not collapse |
| Answer» Force<br>GRAVITATIONAL FORVE IS VERY FORCE IN NATURE | |
| 536. |
What are masons |
| Answer» The strong nuclear force are mediated by the particles called as π -mason | |
| 537. |
Class 11 Me novel lagega ki nahi Lagega to kon sa |
| Answer» Novel ni h<br>No there is no novel in our syllabus | |
| 538. |
What is the shyllabus of physics and chemistry in class11 |
| Answer» check on cbse syllabus.com | |
| 539. |
What is the shyllabus of physics in class12 |
| Answer» | |
| 540. |
explain weak nuclear force |
| Answer» Weak Nuclear Force: This force appears only in certain nuclear processes such as the β-decay of a nucleus. In β-decay, the nucleus emits an electron and an uncharged particle called neutrino.This particle was first predicted by Wolfgang Pauli in 1931. | |
| 541. |
The percentage errors in the measurement of mass and speed are %and % |
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| 542. |
Derive law of equipartition of energy |
| Answer» According to the law of equipartition of energy, for any dynamic system in thermal equilibrium, the total energy for the system is equally divided among the degree of freedom.Kinetic Energy of a single molecule: KE = 1/2 mv2. A gas in thermal equilibrium at temperature T, the average Energy is:Eavg = 1/2 mvx2\xa0+\xa01/2 mvy2\xa0+ 1/2 mvz2\xa0\xa0= 1/2KT + 1/2 KT + 1/2 KT = 3/2 KTwhere K = Boltzmann’s constant. In case of a monoatomic molecule, since there is only translational motion, the energy allotted to each motion is 1/2KT. This is calculated by dividing total energy by the degrees of freedom:3/2 KT\xa0÷ 3 = 1/2 KT | |
| 543. |
3rd law of motion |
| Answer» To every action, there is always an equal and opposite reaction.For example, when you hold the ball, a force acts on the ball (Action), and an equal and opposite force acts on your hand (Reaction).<br>Every action has an equal and opposite reaction. | |
| 544. |
Anyone from Podar International School |
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| 545. |
State and prove that parallel axis theorem for moment of inertia |
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| 546. |
Show that Newton second law is real law of motion. |
| Answer» | |
| 547. |
Prove that ideal gas equation pv=nRT |
| Answer» \tThe gases following Boyle’s law, Charles’law and Avogadro law firmly are termed as anideal gas.\tFrom Boyle’s law we have V\xa0∝ 1/p (Constant T, n)\tFrom Charles’ law we have V\xa0∝ T\xa0(Constant p, n)\tFrom Avogadro’s law we have\xa0V\xa0∝ n\xa0(Constant T, n)\tCombining them we get, V\xa0∝ nT/p\tor V = nRT/p\xa0pV = nRT ………………………… (IDEAL GAS EQUATION)R =pV/nTR= Gas Constant. It is same for all gases. | |
| 548. |
Prove that even or odd harmonics are produced in open organ pipe |
| Answer» If conditions at the two boundaries are same, then both even and odd harmonics are obtained. Based on this principle, in an open organ pipe both odd and even harmonic are produced.In Pth harmonic,Total anti-nodes between two open ends = P + 1Distance between two antinodes = λ / 2l = P ( λ/2 )λ = 2 I/P ----- (1)n = V/λ ----- (2)Substituting (2) in (1) we get,n = PV / 2 lP = 1, 2, 3 ...P = 1; n1 = V/2l -- This is 1st harmonic frequencyP = 2; n2 = 2 V/2l = 2 n1 -- This is 2nd harmonic frequencyHence n1:n2 = 1:2Similarly, n1:n2:n3:n4 ... = 1:2:3:4...Hence proved, in an open organ pipe both odd and even harmonic are produced.\xa0 | |
| 549. |
Deduce the relation between tarque and angular momentum |
| Answer» Angular momentum(L):- It is an measure of the rotation of body, taking into account its mass , shape and speed.\xa0L = r ×\u200b pwhere r is distance from the axis of rotation and the p is the linear momntum of the body.Torque(τ): It is an moment of force i.e. tendency of a force to rotate an object about an axis.We have shown that Newton\'s second law can be written asΣF\xa0=\xa0dp/dt.where ΣF\xa0is the net force acting on a body. Thus we can writer\xa0´\xa0ΣF\xa0=\xa0r\xa0´\xa0dp/dt.Since the net torque acting on a body is Στ =\xa0r\xa0´\xa0ΣF, and since we can add to the right hand side of the preceding equation the quantity\xa0dr/dt\xa0´\xa0p\xa0= 0 without changing its value, we can writeΣτ =\xa0r\xa0´\xa0dp/dt + dr/dt\xa0´\xa0p =\xa0d(r\xa0´\xa0p)/dt.We define angular momentum as\xa0L\xa0º\xa0r\xa0´\xa0pThe preceding equation then becomesΣτ\xa0=\xa0d\xa0L/dt,which is the rotational analogue of Newton\'s second law as expressed at the top of this derivation. (We note that\xa0like torque, which depends both upon the net force applied to a body and the point about which that torque is\xa0calculated, a body\'s angular momentum depends upon the net momentum of the body and upon the point about\xa0which its angular momentum is calculated.) | |
| 550. |
Is ray optics in in class 11 or in class 12 in session 2019-2020 |
| Answer» Class 12 | |