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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.
| 2301. |
Define uniform motion.... |
| Answer» When a body covers equal distance in equal intervals of time<br>\xa0uniform motion is defined as the motion of an object in which the object travels in a straight line and its velocity remains constant along that line as it covers equal distances in equal intervals of time, irrespective of the duration of the time. | |
| 2302. |
Define non conservative force |
| Answer» Path dependent forces<br>Non-\xa0conservative forces\xa0are\xa0forces\xa0which act on a body and the work done on the body by the\xa0force\xa0is dependent on the path followed. During the motion of a body due to\xa0non-conservative force, mechanical energy is dissipated, so we can call the\xa0non-conservative forces\xa0as dissipative courses.<br>A non-conservative force is the one for which work done depends on the path. For eg, frictional force. Friction does more work on the block if one slides it along the indirect path across the tabletop. The longer the path, the more work friction does. | |
| 2303. |
Kis kis ke half early exam ho gaye??mere abhi tak nhi hue. Khus hou ki rou?? |
| Answer» Nhi hua bro<br>Delhi mai hu skv??<br>konse school mai ho aap..?<br>Sahi hai mere nhi hue ?????<br>hamare ho gaye | |
| 2304. |
Two vectors a and b are perpendicular find value of ab |
| Answer» Carryminati s u hi pdho .?<br>$$0$$ as $$cos90° = 0 $$ (αβ=α×β cosθ)<br>Since theta =90°A vector.B vector = AB cos90° (cos90°=0)A vector.B vector = 0 | |
| 2305. |
Why does the density of solid | liquid decreases with rise in temperature? |
| Answer» Density of solid decreases as be increase the temperature. Since mass remains the same but volume increases with increase in temperature that results in decrease in density. | |
| 2306. |
obtain the expression for the efficiency of carnot engine. |
| Answer» Carnot engine is a theoretical thermodynamic cycle proposed by Leonard Carnot. It gives the estimate of the maximum possible efficiency that a heat engine during the conversion process of heat into work and conversely, working between two reservoirs, can possess. It is defined as ratio of net mechanical work done per cycle by the gas to the amount of heat energy absorbed per cycle from the source. | |
| 2307. |
What is physical signifiacane of moment of inertia |
| Answer» Moment of inertia plays the same role as is played by mass in translatory motion. In translatory motion, mass is a measure of inertia, therefore, moment of inertia is a measure of rotational inertia in rotatory motion.Moment of inertia is a measure of how difficult it is to rotate a particular body about a given axis. significance: Greater the mass concentrated away from the axis, greater the moment of inertia. | |
| 2308. |
What is radius of gyration..... |
| Answer» Radius of gyration\xa0or gyradius of a body about an axis of rotation is defined as the radial distance to a point which would have a moment of inertia the same as the body\'s actual distribution of mass, if the total mass of the body were concentrated there. ... One can represent a trajectory of a moving point as a body. | |
| 2309. |
Show that Newton\'s first law and the third law of motion are contained in the second law. |
| Answer» Rockets can propel themselves through the nothingness of space because of two fundamental laws of physics: Newton’s Third Law and the Conservation of Linear Momentum. Both ideas are essential to understanding how nearly everything in the universe moves. When an ice skater takes off from a dead stop, she digs her blade into the ice and the ice pushes back with an equal and opposite force, sending her gliding across the rink. When a cannon is fired, the cannonball goes hurtling through the air while the cannon recoils backward in response. Both of these principles stem from the same general idea: that the universe likes to keep everything in balance.<br>1 . First law is contained in the second law : - there will be no acceleration in the body if no external force is applied . This means that a body at rest will remain at rest and a body at motion will remain in motion . | |
| 2310. |
Establish stoke formula of viscosity. |
| Answer» The viscous force acting on a sphere is directly proportional to the following parameters:\tthe radius of the sphere\tcoefficient of viscosity\tthe velocity of the objectMathematically, this is represented asF∝ηarbvcNow let us evaluate the values of a, b and c.Substituting the proportionality sign with an equality sign, we getF=kηarbvc\xa0(1)\xa0Here, k is the constant of proportionality which is a numerical value and has no dimensions.Writing the dimensions of parameters on either side of equation (1), we get[MLT–2] = [ML–1T–1]a\xa0[L]b\xa0[LT-1]c\xa0Simplifying the above equation, we get[MLT–2] = Ma\xa0⋅ L–a+b+c\xa0⋅ T–a–c\xa0(2)\xa0According to\xa0<a href="https://byjus.com/physics/mechanics/">classical mechanics</a>, mass, length and time are independent entities.Equating the superscripts of mass, length and time respectively from equation (2), we geta = 1 (3)–a + b + c = 1 (4)–a –c = 2 or a + c = 2 (5)Substituting (3) in (5), we get1 + c = 2c = 1 (6)Substituting the value of (3) & (6) in (4), we get–1 + b + 1 = 1b = 1 (7)Substituting the value of (3), (6) and (7) in (1), we getF=kηrvThe value of k for a spherical body was experimentally obtained as\xa06πTherefore, the viscous force on a spherical body falling through a liquid is given by the equationF=6πηrv | |
| 2311. |
Stoke law of viscosity |
| Answer» According to\xa0Stokes law, if a spherical body falls into a viscous liquid then the force acting at the interface is proportional to – Radius of the spherical body, velocity of the sphere, and\xa0viscosity\xa0of this given fluid. | |
| 2312. |
Derive an expression for gravitational potential? |
| Answer» If a body is taken from the surface of the earth to a point at a height ‘h’ above the surface of the earth, then ri\xa0= R and rf\xa0= R + h then,ΔU = GMm [1/R – 1/(R+h)]ΔU = GMmh/R(R + h)When, h<<R, then, R + h = R and g = GM/R2.On substituting this in the above equation we get,Gravitational Potential Energy ΔU = mgh<br>When a body of mass (m) is moved from infinity to a point inside the gravitational influence of a source mass (M) without accelerating it, the amount of work done in displacing it into the source field is stored in the form of\xa0potential energy\xa0this is known as gravitational potential energy. It is represented with the symbol Ug.The equation for gravitational potential energy is:⇒ GPE =\xa0m⋅g⋅hWhere,\tm is the mass in kilograms,\tg is the acceleration due to gravity (9.8 on Earth)\th is the height above the ground in meters | |
| 2313. |
A rigid body having constant speed but variable velocity what kind of motion this is |
| Answer» Non uniform motion Eg,while moving in a circular path the speed is constant but direction(velocity)changes continuously<br>A body can have a constant speed but a changing velocity because the direction can change while the speed is constant. ... However, a body can not have a constant velocity with a changing speed.For example :A car can not be slowing down yet still be going the same speed and direction. | |
| 2314. |
What force will be required to stretch a steel wire 1cm square thick... |
| Answer» Young’s modulus (Y) can be written asY = FL / (Ae)Rearrange the above equationF = YAe / L= YAL / L ………[∵ Elongation (e) = L]= YA= 2 × 1011 N / m² × [1 cm² × 10^-4 m²/cm²]= 2 × 107 NForce required is 2 × 107 N\xa0 | |
| 2315. |
What is p blocks elements |
| Answer» What is torque<br>What a physics<br><section itemprop="mainEntity" itemscope="" itemtype="https://schema.org/Question">The p-block is the region of the periodic table that includes columns 3A to column 8A and does not include helium. There are 35 p-block elements, all of which are in p orbital with valence electrons. The p-block elements are a group of very diverse elements with a wide range of properties.</section><section itemprop="mainEntity" itemscope="" itemtype="https://schema.org/Question">The elements s-block and p-block are so-called because their valence electrons are either in an orbital s or p. These are often called Standard Components, in order to differentiate them from the sequence of</section><br>The elements in which the last electron enters the p – orbital of their outermost energy level are called p – block elements. It contains elements of group 13,14, 15, 16, 17 and 18 of the periodic table. General electronic configuration of p – block elements is ns2\xa0np1-6. | |
| 2316. |
Explain the Dimension |
| Answer» Helll ritesh bro i am seraj<br>measurement of length in one direction. Examples: width, depth and height are dimensions. ... a square has two dimensions (2D), and a cube has three dimensions (3D). In Physics it can also mean any physical measurement such as length, time, mass, etc. | |
| 2317. |
What are the all relations in the chapter rotational motion? |
| Answer» | |
| 2318. |
Newton first law derivation |
| Answer» V = u + at² | |
| 2319. |
What is a scaler quantity |
| Answer» The physical quantity which have only magnitude is called scaler quantity<br>The physical quantity which can be measured with a instrument called scaler quantity<br>Which have only magnitude | |
| 2320. |
What is energy, energy and power? describ the all types. |
| Answer» Power defined as rate of doing work<br>Energy of a person defined as a capacity or ability to do work | |
| 2321. |
Convert 1erg of work into joule using dimension... |
| Answer» Kinetic theory gases<br>1erg =10^-7<br>Erg is CGS of energySo use dimensional form. of Energy and N2=n1(m1/m2)â..... | |
| 2322. |
You are given a thread and a metre scale how will you estimate the diameter of the thread |
| Answer» | |
| 2323. |
Victor |
| Answer» | |
| 2324. |
value base |
| Answer» 5 marks | |
| 2325. |
Hjfu |
| Answer» Maa chuda | |
| 2326. |
Find the angle between the vector a=i cap+2j cap+k cap vector b=i cap +j cap-2kcap |
| Answer» Please answer me | |
| 2327. |
1 AU = ? |
| Answer» 1.496×10^11m | |
| 2328. |
Difference between vector and spectrum? |
| Answer» | |
| 2329. |
Find the dimensional formula a,b,cV=at3 + bt2 + c/d+t |
| Answer» A=LT-4, B=LT-3, D=T , C=L<br>Question achha hai par Karne ka man nahi Kar Raha hai🥱 | |
| 2330. |
differentiation of sin(x^2) |
| Answer» 2x.cosx^2 | |
| 2331. |
Define one low of Newton |
| Answer» | |
| 2332. |
Significant figure of 0.007m to power 2 |
| Answer» | |
| 2333. |
All derivation used in ch work power and energy including 2mgh etc |
| Answer» | |
| 2334. |
ASSUME 1j=1kgm^2s^2. Show your working |
| Answer» | |
| 2335. |
Convert 25kj in terms of ergs |
| Answer» | |
| 2336. |
Can the resultant of two unequal forces be equal to zero |
| Answer» No<br>Exuse me divya will you be my study patner?<br>No | |
| 2337. |
What is 2nd law of thermodynamic? |
| Answer» | |
| 2338. |
Can you explain graph of basic maths |
| Answer» | |
| 2339. |
Physical word |
| Answer» | |
| 2340. |
Write the dimension of angular velocity |
| Answer» Class 9th<br>MLT-1 | |
| 2341. |
Write the dimension of electric field intensity |
| Answer» | |
| 2342. |
Write the dimension of kinetic energy |
| Answer» | |
| 2343. |
Write the dimension of plank\'s constant |
| Answer» E=h.vh=v/e[h]=[LT^-2]/[ML^2T^-2][h]=[M^-1L^-1]Hence, dimension of planks constant is [M^-1L^-1T^0] | |
| 2344. |
(3x-4)^3/2 |
| Answer» | |
| 2345. |
d÷dx(√x-7x1÷2+3) |
| Answer» | |
| 2346. |
Physics,technology and society |
| Answer» | |
| 2347. |
1J=_ erg |
| Answer» 1J=10⁷ ergs | |
| 2348. |
Explain parallax method for measuring distance of star |
| Answer» | |
| 2349. |
What do you know about fundamental unit and derived unit ? |
| Answer» Fundamental unit=the unit of all physical quantity.There are 07 fundamental unit and 02sub fundamental unit are there.Derived unit=the unit of physical quantities which is derived by fundamental unit | |
| 2350. |
What is the difference between 5.0 and 5.00 |
| Answer» There is difference between 5.0 and 5.00 is 100<br>There is no differenceBoth 5.0 and 5.00 mean 5 | |