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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.
| 9751. |
Phase transition of ice |
| Answer» Ice into water is melting and ice into gas is evaporation | |
| 9752. |
Specific heat capacity of 1 mole of solid (calculate the value) |
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Answer» Delta Q=ms Delta TTherefore,s (specific heat capacity)= Delta Q/m Delta T Mc delta t |
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| 9753. |
Dimemsional formula of viscosity |
| Answer» ML^-1T^-1 | |
| 9754. |
Elastic limit and yield limits are equal aren\'t? |
| Answer» Same | |
| 9755. |
Find the position of a particle in SHM when it\'s velocity is half the velocity at its mean position |
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| 9756. |
How do submarin work |
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Answer» Submarines work on principle of SONAR It uses a device called breather, which is a air passage provided by a retractable containing and exhaust pipe which permits submarine to stay submerged in water. |
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| 9757. |
How to find distance, average velocity , average speed by calculus ??? Step by step explain |
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Answer» Thanks. Shreepad Displacement/time s avg velo Please answer |
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| 9758. |
Universal law of gavitation |
| Answer» Newton\'s\xa0law\xa0of\xa0universal gravitation\xa0states that a particle attracts every other particle in the universe with a force which is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers. | |
| 9759. |
Parallelogram vector addition |
| Answer» Hey its really very simple you just need to keep up with triangle law of vector addition.suppose you have a car being pulled by ropes on both sides to which side it will move the answer is diagonally and not towards any rope because it pulled equally by both sides.that is what parallelogram says right,that the resultant of both vectors will be towards its diagonal ,fairly simple right. | |
| 9760. |
optics chapter is removed for 12th board exam cbse or not |
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Answer» Ya it\'s is in 11th It is there in class 11th at present and class 12 th at present. Next year it will be removed from 12th board Yes for academic year 2019-20 |
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| 9761. |
Derivation of bernaoulli principle..? |
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| 9762. |
What is viscocity? |
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Answer» Resistivity of a fluid to flow. Some kind of frictional force between the layers of liquid. it is defined as the ratio of shearing stress to shearing strain. formuale= n=F×L/V×A Property of a fluid due to which it opposes the relative motion between different layers of fluid |
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| 9763. |
V= 10+\'-0.1 l= 5+\'-0.1 Express the resistance with percent error |
| Answer» Plz gyz ans this | |
| 9764. |
Gud morning guys ??plz explain me the consumptions of KTG in brief |
| Answer» I think it\'s assumption of ktg and you\'ll get the answer in notes of this app | |
| 9765. |
Sl arora vol1 gravitation solutions |
| Answer» | |
| 9766. |
Can anyone tell me how to draw corresponding graph of indicators diagram??. Explain with examples |
| Answer» Please answer this question it\'s important | |
| 9767. |
All constant are dimensionless. Coment |
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Answer» There are two types of constant . one is dimensional constant eg. π. Second is dimensionless constant eg. Planck\'s constant , Stefan\'s constant, gravitational constant etc.......... Hope this will help:) no all constant are not dimensionless..e.g.gravitational , planks constant have dimension... |
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| 9768. |
What do you mean by conservative force ? Give an example for conservative force. |
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Answer» It depends on the initial and the final positions.It doesnt deprnds on the path followed by the object A conservative force is a force with the property that the total work done in moving a particle between two points is independent of the taken path. Example :-the force of gravity and the spring force are conservative forces |
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| 9769. |
Pressure of an ideal gas? plz give ans fast |
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Answer» 1 atm 1 atm?? |
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| 9770. |
Water rises in a capillary tube but mercury falls in the same tube. Why? |
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Answer» Also height is inversely proportional to density and mercury is denser than water Because of large cohesive force of mercury which is greater than adhesive force between mercury and tube, Due to the heavy weight of Mercury and it is more viscous than Water |
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| 9771. |
Define different type of stress and strain. |
| Answer» a. Longitudinal stress and strainb. Normal stress and strain c. Shearing stress and strain | |
| 9772. |
Derive expression for escape velocity for the planet earth. Mass of object is m |
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| 9773. |
Vector quantity |
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Answer» Those who have magnitude and direction and follow vector law is known as vector quantity Those which have magnitude and direction both |
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| 9774. |
What is damped iscillstion?? |
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Answer» The oscillatory motion in which the amplitude decreases continously with the passage of time is known as damped oscillation. Hope this will help u ??? A damped oscillation means an oscillation that fades away with time. Examples include a swinging pendulum, a weight on a spring, and also a resistor............? |
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| 9775. |
Friction is necessary evil. Explain. |
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Answer» Without friction we cannot set out the bodies in motion or stop the moving bodies. Thus friction is absolutely necessary for carrying day to day activities. On the other hand, it also wastes the time and energy, brings about wear and tear and slows down the motion. Thus, we can say that friction is a necessary evil. In this platform we deal with conceptual explainations and therefore instead of a story on "Friction as a necessary evil" I provide you with below conceptual solutions. (i)- Friction is a necessary evil.(ii )- There are instances in daily life where friction is a necessity.(iii )- Without friction, we cannot hold objects in our hands, we cannot walk and we cannot light a matchstick,we would not be able to apply brakes in the moving vehicles etc(iv)- Friction has both advantages and disadvantages.(v)- And therefore, eventhough friction obstructs the intended motion, it is infact very important in daily life. Friction is a necessary evil. Explain. |
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| 9776. |
For investigatory project kay liye newton\'s law of motion ka aim btao plz jaldi btana plz .... |
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| 9777. |
What will happen if I don\'t get it but I don\'t know if I can help you |
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| 9778. |
Ball 1collides head on with an another |
| Answer» | |
| 9779. |
Define and difference between Ductile material and Brittle material. |
| Answer» If fracture point and ultimate strength points are very close in stress strain curve then it is brittle.If the two points are seperated by a distance and are far apart it is ductile. | |
| 9780. |
Where does the weight of the body is more at the sea level or at the ground? |
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Answer» At ground because sa we move toward centre gravity decreses and W=mg so gravity decreses then mass also decreses I think at the ground...weight will be more... |
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| 9781. |
How much marks Ray optics in final exam |
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Answer» 4 marks 8 |
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| 9782. |
Hiiii Ray optics is easy or tough |
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Answer» It is easy if u have idea of lense and mirror in class 10 Good answer Anisha Ray optics is still going on from the last 15 days... But still some topics are remaining... ? In your school ray optics is complete Thanks If you study it by taking interest then it is not tough.... Well... Mirror and lens which we have studied in 10 are nearly same...... By the way chapter is so interesting.... ?? |
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| 9783. |
Blue print of marks distribution? |
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Answer» For class 11, different schools form their different blue prints... It depends upon ur school. Mostly all chapters will have equal weightage 4 marks |
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| 9784. |
What is blue colour defect |
| Answer» | |
| 9785. |
Give the magnitude and direction of net force action on. (1)A cork of mass 10g floating on water |
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Answer» Due to buoyancy force the gravity force is equal and opposite to buoyant force i-e;they cancelled out each other so net force is zero on cork 0 N force as the force due to mass is cancelled by the upthrust 0.1 N upward |
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| 9786. |
What is the slope of displacement -time graph represent |
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Answer» Velocity ;Velocity=displacement÷time taken Velocity Velocity |
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| 9787. |
Write the dimension and SI unit of angular momentum |
| Answer» SI unit of angular momentum is kgm^2/s. And dimension is ML^2T^-1 | |
| 9788. |
Relation with alpha thermal properties |
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Answer» 6a=3ß=2y B= 2A and Y=3A where A=alpha, B= beeta and Y= gamma |
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| 9789. |
Hooke\'s law |
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Answer» Stress/strain = constant According to Hooke\'s law strain produced in any body, is directly proportional to stress applied within the elastic limit. Moreover, For a spring, F needed to extend or compress by some distance X is proportional to that distance. That is,F=- kX , where k is a constant factor characteristic of the spring: its stiffness, and X is small compared to the total possible deformation of the spring.Assumption:1. This law is true only for linear elastic bodies. |
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| 9790. |
Momentum is a scaler or vector |
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Answer» Vector because p=mv where v is a vector qty. Vector vector Scalar |
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| 9791. |
What is mean free path for gas and what are the factors on which it depend |
| Answer» free path the distance traveled by a gas molecule between two successive collisions is known as free path ...andThe factors on which the mean free path (λ) of a gas molecule depends are:(i) Diameter of the molecule: begin mathsize 14px style straight lambda proportional to 1 over straight d squared end style(ii) Number of gas molecules per unit volume: begin mathsize 14px style straight lambda proportional to 1 over straight n end style(iii) It depends indirectly on factors like temperature, pressure and Boltzmann constant. | |
| 9792. |
Bernoli theorum |
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Answer» It states that for an incompressible non viscous fluid, in streamlined flow,Sum of pressure energy, kinetic energy, potential energy is constant along a streamline Bernoullis theorem is like the application of \'Law of conservation of energy\' for fluids.It basically reflects the fact that the sum of all the energies like pressure energy,kinetic energy per volume and potential energy per volume is equal at the inlet and an outlet of a fluid flow. |
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| 9793. |
State work energy Theorem and prove it for vairable force |
| Answer» Total work done = change in kinetic energy | |
| 9794. |
Important topics from thermodynamics and wave s |
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Answer» In thermodynamis working of refrigerator and its cofficient of performance and heat engine and second law of thermodynamics and limitations of first law of thermodynamics Factors affecting the speed of sound also most important Chapter – ThermodynamicsImportant Topics:1. Zeroth Law of Thermodynamics2. First Law of Thermodynamics3. Heat Engines4. Second Law of Thermodynamics5. Carnot .......... ........................................................................................Chapter – Waves1. Longitudinal and Transverse Waves2. Displacement relation in Longitudinal Waves3. Characteristics of Longitudinal and Transverse Waves4. Principle of Superposition5. Standing Waves6. Beats7. Dooplers Effect All laws of thermodynamics,limitation of first law,Work done in adiabatic and isothermal process,Heat engine ,refrigeratorWavesDifference b/w transverse and longitudinal waveWave function Formation of beats?I think this help you Plzz help....tmrw is my exam |
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| 9795. |
What is the kinetic interpretation of tempereture |
| Answer» From the kinetic theory of gases, average energy of a gas molecule is given by1/2mv*2 =3/2kTOr. 1/2mv*2 directly propotional TThus,average kinetic energy of a gas molecule is directly propotional to the absolute temperature of the gasIf T=0,then 1/2mv*2=0Therefore ,absolute zero is that temperature at which the molecular motion stops. | |
| 9796. |
What is the kinrtic interpretation of temperature |
| Answer» | |
| 9797. |
Can a collision takes place without the particle being in contact? |
| Answer» Yes. Collision does not only mean physical contact but change in direction of motion of body by the influence of another body. Repulsion of positively charged particle by another positively charged particle withiout any physical contact is also collision. | |
| 9798. |
Explain the second and third mode of vibration in a stretched string with necessary diagram |
| Answer» | |
| 9799. |
Do you have physics practical? |
| Answer» Yes I have physics practical. | |
| 9800. |
What is Bernoulli s theorem |
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Answer» The sum of pressure energy kinetic energy potential enrgy per unit vilume of a non viscous incompressible fluid and its streamlined and irrational flow become Constan Pressure + 1/2*density*velocity^2 +density*acc due to gravity*height=constant |
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