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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.
| 2401. |
Estimate the fraction of molecular volume to the actual volume |
| Answer» | |
| 2402. |
Bulk modulus |
| Answer» Bulk modulus is defined as the ratio of normal stress to the volumetric strain<br>Bulk stress/bulk strain<br>Change in length/original length | |
| 2403. |
Practical of physics class 11 term 2 |
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| 2404. |
D sin power minus 1 ×xby a² by a² |
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| 2405. |
Give any two illustration of Bernoulli s principles |
| Answer» Blood flow and heart attackDynamic lift<br>When a truck moves very fast, it created a low pressure area, so dusts are being pulled along in the low pressure area. If we stand very close to railway track in the platform, when a fast train passes us, we get pulled towards the track because of the low pressure area generated by the sheer speed of the train.Enjoy ? | |
| 2406. |
Dimension of k/m k is force costant |
| Answer» Dimension of K=N/m. k/m=Nm-2 | |
| 2407. |
Describe Kepler\'s law of planetary motion |
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| 2408. |
What is meant by elasticity |
| Answer» Elasticity is a property of material to gain it\'s its original size after deformation .<br>The property of virtue by which a body can regain its original shape and size after the removal of deforming force<br>Elasticity is the property of regaining the original configuration after the removal of deforming force. | |
| 2409. |
What is the Bernoulli theorem |
| Answer» I think question is wrong<br>The total energy within the flow of a non viscous fluid through a tube of non uniform cross section remains a constant at all points inside the tube, even if the points aren\'t at the same level of height. This is what bernoulli\'s theorem says. The sum of Pressure energy, Potential energy, kinetic energy = CONSTANT. | |
| 2410. |
The pressure of a gas is decided by |
| Answer» Mass and volume<br>V , T, concentration.<br>Volume | |
| 2411. |
What is wave? |
| Answer» Wave is a disturbance travelling in a medium which transfers energy and momentum with it. | |
| 2412. |
Hi.. |
| Answer» I also don\'t know how to solve problems in physics..I\'m also having the same problem..<br>How to solve problems in physics<br>Is this app helpful.?If yes , then how much.?<br>For which exam you are preparing ?<br>Hi | |
| 2413. |
Y=0.5sin6.28t-9.42x find velocity, frequency and wavelength |
| Answer» Time period T = 2π/ω = 2π / 6.28 = 1 sec// F = 1/T = 1 sec^-1// v = Aω cos (ω t + ∅) = 0.5 × 2π cos (2πt - 9.42x)// λ = V / F = 0.5 × 2π cos(2πt + ∅) // | |
| 2414. |
What is Shearing strain |
| Answer» It is defined as the rate of relative displacement of face ∆x and the length of cylinder L Shar strain =∆x/L<br>Shearing strain is the measure of the relative displacement of the opposite faces of the body as a result of shearing stress. | |
| 2415. |
What is compressive stress? |
| Answer» It is defined as when we applied a force on cylinder then the height of cylinder is decrease so then stress is Cs=force ( ex) / area | |
| 2416. |
A ball is thrown upwards with a velocity of 100 m/s. It will reach the ground after what time |
| Answer» T=u/g =100/10<br>T = 2 (v-u) /a = 2 × -100 / -10 = 20 s. // | |
| 2417. |
How to work hydroulic lift |
| Answer» A typical hydraulic automobile lift consists of two pistons, one small and other big, connected on two separate ends of a bent tunnel, one end with bigger cross section A2 than other end A1. The organization of components in the system is such that a small force F1 applied on the smaller piston A1 gets multiplied to result in a bigger force at the bigger piston A2 which is connected to the platform where automobiles are placed to be lifted. According to Pascal\'s law, for any fluid of density D, P1 = P2. F1A1 = F2A2. F2 = A2/A1 × F1 (where, A2/A1 is also known as MECHANICAL ADVANTAGE) | |
| 2418. |
Why a spinning cricket ball in air does follow a curved path? |
| Answer» | |
| 2419. |
Can we design an artificial limb which is lighter but stronger |
| Answer» Material such as modern plastic have yielded prosthetic devices that strong but more lightweight then earlier limbs made of iron and wood . New plastic better pigment and more sophisticated procedures are responsible for creating realistic looking skin. | |
| 2420. |
Show that the path followed by a projectile is a parabolic |
| Answer» | |
| 2421. |
Thermal conductivity |
| Answer» Ability of the conductor to conduct heat through it is called as Thermal Conductivity✓ | |
| 2422. |
Pani ko garam krna kon si kriya hai |
| Answer» Heat energy work done | |
| 2423. |
Kinetic theory all formules |
| Answer» Thanks<br>1/2 mv^2 | |
| 2424. |
Define Newton\'s second law of motion? |
| Answer» rate of change of the momentum of a body is equal in both magnitude and direction to the force imposed on it Basically this law gives you this equation : F = ma where, F is force, m is mass and a is acceleration.<br>rate of change of the momentum of a body is equal in both magnitude and direction to the force imposed on it Basically this law gives you this equation : F = ma where, F is force, m is mass and a is acceleration.<br>the time rate of change of the momentum of a body is equal in both magnitude and direction to the force imposed on itBasically this law gives you this equation : F = mawhere, F is force, m is mass and a is acceleration. | |
| 2425. |
Define Newton\'s second law of motion .Derive mathematically form of force with its unit |
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| 2426. |
Why hot soup is tastier than cold one ?? |
| Answer» Due to diffusion .<br>Because their molecules are fastly diffuse in air hence the soup is fresh and whereas coldone is not | |
| 2427. |
How does Bernoulli\'s principle helps in explaining cyclone |
| Answer» Bernoulli’s Principle states that the pressure exerted by a fluid decreases as its velocity increases. As the velocity of a fluid (or air in our case) increases, the pressure decreases so the static air inside the house has a higher pressure than the fast moving air outside, creating a pressure difference. As the wind speed increases, the pressure difference between the inside and outside of the house (area above the roof) gets larger until it reaches a point where the pressure difference is sufficiently large enough to “pop” the roof off the top of the house. This is the reason why cyclones are able to swipe off the roof of a house due to its structure. | |
| 2428. |
Operation on a litre of water |
| Answer» | |
| 2429. |
How do Bernoulli\'s principle helps in explaining dynamic lift? |
| Answer» In the case of a clockwise spinning ball, the relative velocity of air with respect to the ball would be GREATER (velocities are antiparallel) than that below the ball. As a result, as per the Bernoulli\'s principle (P ~ 1/V), pressure below would be GREATER than pressure above the ball. Consequently, the ball shows a slight deflection in its path towards the upper direction (passive movements occur from high pressure to low pressure). This phenomenon of deviation is known as DYNAMIC LIFT. | |
| 2430. |
What is Pascal law and it\'s use |
| Answer» Pascal\'s law states that if the pressure is applied on fluids that are confined within an enclosed medium, the fluids would then transmit the same pressure in all directions at the same rate, provided temperature and density remains constant throughout. The same principle is used in case of Hydraulic lift, Toricelli\'s barometer and in case of Hydraulic brake system provided in vehicles. | |
| 2431. |
Young Modulus is inversely proportional to root of diameter. Why?? |
| Answer» Thanks<br>Take a simple practical example. Take a cardboard block or anything cuboidal in shape like that you have. Try to bend the block at two opposite rectangular faces of the cuboid. It is easy. But, try so taking the other two rectangular faces. If we assume that the distance between the first two faces is LESS than the last two rectangular faces then it is gonna be even more difficult. If we replace it with a cylinder, the thickness or the interface distance would become the diameter. As Young\'s Modulus is directly proportional to easiness in bending or changing configuration and bringing it back to original, and this bending property is inversely proportional to thickness, Young\'s Modulus is inversely proportional to root of diameter or simply, diameter. | |
| 2432. |
To study the conservation of energy of a ball rolling down on an inclined plane |
| Answer» | |
| 2433. |
Dimensions for angle |
| Answer» Dimension less quantity | |
| 2434. |
What is Poisson s ratio |
| Answer» Poisson\'s ratio is the ratio of lateral strain to the longitudinal strain. It has no units. | |
| 2435. |
What is linear velocity profile? |
| Answer» It turns out (we will prove this at a later date) that the velocity profile, u(y) is linear, i.e. u(y) = Vy/h. ... In a simple 2-D shear flow such as this, the shear stress is directly proportional to the slope of the velocity profile. In fact, the constant of proportionality is the coefficient of viscosity itself! | |
| 2436. |
If y=sinX, then dy/dx |
| Answer» Dy/Dx = CosX<br>Cos x<br>dy/dx = CosX | |
| 2437. |
Difference between stress and strain? |
| Answer» Stress is the restoring force coming from within an elastic object acting per unit area of the object. Whereas, strain is the change in the physical arrangement or the configuration in an elastic object when it is subjected to external force.<br>The stress strain graphs for material A and B are shown | |
| 2438. |
Why terminal velocity is directly proportional to viscosity in relation F=6πvñr. Explain. |
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| 2439. |
Prove that jcap.icap=j.j=k.k=1 |
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| 2440. |
What is Tension and spring force |
| Answer» The tension force is\xa0the force that is transmitted through a string, rope, cable or wire when\xa0it is pulled tight by forces acting from opposite ends. ... The spring force is the force exerted by a compressed or stretched spring upon any object that is attached to it. | |
| 2441. |
MOI of Earth |
| Answer» If we think of the earth as a solid sphere rotating about its center, the moment of inertia is given by: I=25MR2 | |
| 2442. |
Find tension in the string and normal reaction excted the floor in equaillibrium |
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| 2443. |
Explain check wheather the two vector zero or not ? |
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| 2444. |
What is projectile?Deduce expression for time of flight and vertical range. |
| Answer» An object which is moving under the effect of gravity is called gravity.The motion under the effect of gravity only is called projectile motion. | |
| 2445. |
Find the angle between the vector A= 4î+6j^-3k^ and vector B=-2î-5j^+7k^ |
| Answer» 148.795°<br>Lol? | |
| 2446. |
Find the angle between the vectorsVector A=4i^+6j^-3k^Vector B=2i^-5j^+7k^ |
| Answer» 148.795° | |
| 2447. |
The scalar quantity is |
| Answer» It quantity have only magnitude but not direction<br>Quantity that have magnitude only and without direction<br>It is the quantity which have magnitude but no direction<br>Any physical quantity which can be measured only in terms of MAGNITUDE and direction does not affect it\'s measurements. Eg :- Length, Mass, Time, Temperature, etc. | |
| 2448. |
The magnitude of vector quantity is |
| Answer» Vector/unit vector<br>Magnitude of vector=vector/unit vector | |
| 2449. |
The motion of molecule of gas is |
| Answer» Unlike solid and liquid state, molecules in gaseous state show random motion. That is the reason, gases take the shape of container and spread quickly in space. The random motion of molecules in the gaseous state is due to high kinetic energy in molecules. They have weak intermolecular interactions between them. | |
| 2450. |
What will be the dimensional formula of \'g acceleration due to gravity\' |
| Answer» [MLT-2]<br>Okay thank you<br>It is an acceleration therefore it\'s dimensional formula will be equal to dimensional formula of acceleration | |