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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.
| 551. |
Is optics is removed this year |
| Answer» Read this Article:<a href="https://www.dnaindia.com/education/report-cbse-shifts-class-12-chapters-to-11th-reduces-burden-2596003">https://www.dnaindia.com/education/report-cbse-shifts-class-12-chapters-to-11th-reduces-burden-2596003</a> | |
| 552. |
Why are tides formed in the sea on full moon night ? |
| Answer» | |
| 553. |
Bnju |
| Answer» | |
| 554. |
[tex]sqrt{8)[/tex] |
| Answer» | |
| 555. |
Define surface tension ? Calculate the excess pressure |
| Answer» The force acting per unit length of any body is known as surface tension. | |
| 556. |
physics mai compartment aayi hai kya karu class11 mai |
| Answer» | |
| 557. |
Why do we have different unit for the same physical quantity |
| Answer» Magnitude of any given physical quantity may vary over a wide range, therefore, different units of same physical quantity are required.For example:1. Mass ranges from 10-30\xa0kg (for an electron) to 1053\xa0kg (for the known universe). We need different units to measure them like miligram, gram, kilogram etc.2. The length of a pen can be easily measured in cm, the height of a tree can be measured in metres, the distance between two cities can be measured in kilometres and distance between two heavenly bodies can be measured in light year. | |
| 558. |
Is physics easy in 11tg |
| Answer» Yes of course it\'s very easy ...The only thing you have to do is focus on the concepts and then go for derivations and numericals.....So just go for it, you will surely like it......<br>50-50<br>No | |
| 559. |
How does newton second law of motion give the concept of inertial mass? |
| Answer» Mass given by the equation a =\tF/MM = F/a is called inertial mass. Clearly, higher the a mass means lesser the acceleration. Thus mass of a body resists the acceleration, i.e., rate of change in velocity coming up due to external force or in other words it is the measure of inertia of a body. | |
| 560. |
State and derive work ,energy relationship. |
| Answer» | |
| 561. |
Mountain roads rarely go straight up the slope ,but wind up gradually .Why? |
| Answer» In the straight up situation, the angle of inclination is more than the wind up situation. When mountain roads go wind up, the slope will be less than when the roads go straight up. So the frictional force is very large when the road winds up. So the tire of the vehicle will not slip easily when the roads go wind up. Another thing is that, in the straight up situation due to the large angle of inclination you have to work more to go up against your gravity, but when the roads are wind up due to the small angle of inclination you have to work less to go up against your gravity. That is why mountain roads rarely go straight up the slope but wind up gradually. | |
| 562. |
Give condition for no work. |
| Answer» \tWhen the force acts in a direction at right angle to the direction of displacement (cos90° = 0), no work is done (zero work).\tWork done by the force is negative if the angle between force and displacement is obtuse (90°<θ<180°) as cosθ is negative. This signifies, when the force and displacement are in opposite direction, work done is negative. This work is said to be done by the body. | |
| 563. |
Prove that instantaneous power is given by:vector P=vectorF.vector v. |
| Answer» Power is rate of doing work i.e. ,p = {tex}\\frac{w}{t}{/tex}where w is work done in t seconds.now, we know work is given by -w = f.xwhere f is the force acting for x distance.putting this value of work in the equation of power we\'ll get.p ={tex} \\frac{fx}{t} \\: \\: \\:{/tex}andv ={tex} \\frac{x}{t}{/tex}therefore P= f.v\xa0 | |
| 564. |
11th ka form Kab jama huta hai admission Kylie |
| Answer» | |
| 565. |
Bio ke best side boook bataao |
| Answer» What<br>Yes Ncert is the best<br>I prefer only ncert is best | |
| 566. |
Define root mean square velocity of molecule. Give various relations for it. |
| Answer» Root mean square velocity is defined as the square root of the average of the squares of the individual velocities of the gas molecules i.e., | |
| 567. |
Calculate average K.E. for one molecule of gas at constant pressure. |
| Answer» Pressure exerted by one mole of gas | |
| 568. |
Explain oscillation in air column of close organ pipe. |
| Answer» If the air is blown lightly at the open end of the closed organ pipe, then the air column vibrates (as shown in figure) in the fundamental mode. There is a node at the closed end and an antinode at the open end. If l is the length of the tube,l = λ1/4 or λ1 = 4l …... (1)If n1 is the fundamental frequency of the vibrations and v is the velocity of sound in air, thenn1 = v/λ1 = v/4l …... (2)If air is blown strongly at the open end, frequencies higher than fundamental frequency can be produced. They are called overtones. Fig.b & Fig.c shows the mode of vibration with two or more nodes and antinodes. | |
| 569. |
Is physics is tough |
| Answer» No,it is not tough . | |
| 570. |
How electric motor will works |
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| 571. |
In what percentage in science I choose In 11 class |
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| 572. |
How many chapters have numerical in class 11 |
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| 573. |
Explain escape velocity |
| Answer» \tEscape velocity is the minimum velocity that a body must attain to escape the gravitational field of the earth.\tSuppose if we throw a ball,it will fall back. This is happening due to the force of gravitation exerted on the ball by the surface of the earth due to which the ball is attracted towards the surface of the earth.\tIf we increase the velocity to such an extent that the object which is thrown up will never fall back.This velocity is known as escape velocity. | |
| 574. |
Paper 2016 |
| Answer» | |
| 575. |
Define the doppler effect.? |
| Answer» When the relative motion takes place between source and observer then the apparent frequencies are observed by the observer that effect is known as doppler effect. | |
| 576. |
How do ball bearings help to reduce friction? Plzz answer it as 1 mark question |
| Answer» Ball bearings have balls inside them and thus causing rolling friction which reduces friction. | |
| 577. |
Derive an expression for work done in adiabatic system |
| Answer» | |
| 578. |
Write any one essential condition for total internal reflection |
| Answer» For total internal reflection to occur, 2 conditions must be met:1. The index of refraction must decrease across the boundary in the direction of light refraction.2. The angle of incidence of the light ray must exceed the critical angle of the interface. | |
| 579. |
Whst happens in value of cofficient of friction when weight of a body is halved? |
| Answer» The coefficient of friction depends only on the surfaces in contact and is independent of the force with which the surfaces are in touch with each other. So, the coefficient of friction remains unchanged even when the weight of the body is doubled. | |
| 580. |
What is the passing criteria of class 11 cbse |
| Answer» | |
| 581. |
state the low of equpartition of energy. use it ti obtain value of gama(=Cp/Cv) for monoatomic gas |
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| 582. |
Absolute zero of tempreture |
| Answer» Absolute Zero is defined as minimum absolute temperature of an ideal gas.\tIf we plot pressure versus temperature we get a straight line and if weextend the line backwards to the x-axis as shown in the graph below. The minimumtemperature is found to be 273.15 °C (experimentally) andthis value is known as absolute zero.\tThe relation between the temperature in kelvin and in Celsius scale is given byT = tC + 273.15 | |
| 583. |
Soln of equation of motion by calculus method |
| Answer» | |
| 584. |
Why did strong nuclear force evolved |
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| 585. |
defination of spherical mirror |
| Answer» A mirror with a surface that is either a concave or and forms a portion of a true sphere | |
| 586. |
Mention the essential properties of a medium through which mechanical waves are propagating |
| Answer» Mental | |
| 587. |
Obtain the equation of frequency of oscillator in string tied at both ends |
| Answer» | |
| 588. |
Tips for physics practical exam |
| Answer» Prepare spherometer,vernier callipers,inclined plane... these are important. For each experiment prepare 2 precautions,source of error... | |
| 589. |
Why there are two proppelers on hellicopter |
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| 590. |
What is ultimate or tensile strength |
| Answer» | |
| 591. |
Why in lakes water freeze from top to bottom |
| Answer» During severe winter, the temperature of water in the lake keeps on decreasing. Since cold water is heavier, it keeps on going into the interior of the lake while warm water keeps on coming to the surface of the lake. This process continues till the temperature of entire water of lakes becomes 4°C. Since density of water is maximum at 277 K, any further decrease in the temperature will decrease its density. As a result, the temperature of the surface water keeps on decreasing and it ultimately freezes. Now, any further decrease in the temperature will decrease the temperature of water below 4°C. This process continues and as a result, the lakes keep on freezing from top to bottom. | |
| 592. |
equation of motion of car on level circular road |
| Answer» | |
| 593. |
Equation of motion in vector form give its solutions |
| Answer» Sia .......just give answer to Sanjay....... Don\'t ask for friendship here..... It\'s an app for study not for making friends....... I\'m not here to scold you or let you feel down..... I\'m just suggesting you...... Please don\'t mind it..... I\'m saying it because I have read somewhere in comments that if we talk like this then our account can be diminished and blocked by cbse for without any reason and without any notification.......<br>Will u be my friend ?<br>Hi friend? | |
| 594. |
What is bernolies theorem and what is stocks law? |
| Answer» Bernoulli\'s theorem relates the pressure difference b/w two points in a pipe to both kinetic & potential energy change.It states that as we move along a streamline the sum of the pressure, the K.E.& P.E. per unit volume remains a constant.P+(1/2) pv^2+pgh=constantStoke\'s law states that the viscous drag force F on a sphere of radius a moving with a velocity v through a fluid of viscosity is, F=-6(pi)(eta)av.<br>Barnollies therom = when any liquid passes through any tube then the sum of pressure energy, kinetic energy, and gravitational energy is always constant. | |
| 595. |
laws of reflection of light |
| Answer» Their are two laws of reflection :-1: angle of reflection is equal to the angle of incidence. 2: reflected ray incident ray a\'d normal all lies at the same plane | |
| 596. |
Do we have any syllabus changes in all the subjects in class 12 I.e., cbse class 12 2019-20? |
| Answer» Yes meera... we will come to know it by 1st week of april.... pattern of paper is going to be changed and few chapters are going to be excluded... mainly in english many things are excluded also<br>No not now. If any I will inform you | |
| 597. |
Find the expression of time period using simple pendulum oscillating in SHM |
| Answer» T= 2π√(L/g) | |
| 598. |
drive the safe velocity of a cyclist nagotiating a curve road |
| Answer» Root Rgtantheta | |
| 599. |
What is the affect of pressure on speed of sound? |
| Answer» If you are asking effect of pressure at constant temperature then no change in sound of speed occurs with change in oressure | |
| 600. |
Work done in a rectangular path when initial and final position are same |
| Answer» Here dx=0ThenW=F•dxW=0 | |