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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.
| 901. |
Calculate the gravitational force between electron,and proton seperate by distance of 1A |
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| 902. |
What is the relation between Newton\'s 1st law and 2nd law of motion? |
| Answer» F=maA=v-u/tWhen f=0: m!=0 so a=0t!=0 so v-u=0Hence v=uThus body remains in same state of motion.. ie law of inertia obeyed | |
| 903. |
Dalton\'s law of partial pressure |
| Answer» P=P1+P2+P3+........ | |
| 904. |
Bernoulli\'s theorom |
| Answer» Pure tarike se galat hai<br>The sum of three energy pressure, kinetic,and potential is known as Bernoulli\'s theorem | |
| 905. |
Working of hydraulic brakes |
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| 906. |
Define SHM. Find the displacement,velocity and acceleration |
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| 907. |
coefficient of conductivity class 11 physics |
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| 908. |
On what value do the angle of contact depends ? |
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| 909. |
why does air pressure in a car tyre incerease during driving |
| Answer» Hey gaurav how to upload images for questions pls tell...<br>During driving, as a result of the friction between the tyre and the road, the temperature of the tyre and the air inside it, increase since volume of the tyre does not change (practically); due to increase in temperature, pressure of the air increases | |
| 910. |
Thermodynamic state and thermodynamics process |
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| 911. |
Guys tomorrow is my Physics annual exam. How to prepare ? |
| Answer» Read important questions from this app, then all ncert questions all derivation there are 100 derivation in total. Maximum derivation will be for 25 marks only. Give limited time for derivation not more than a day. Be confident woth wat u have prepared. Think positive u will score good marks.all the best for all exams<br>please read some important concepts ex: ch 1,8,6,9, and ray optics for passing marks | |
| 912. |
is additional exercise also comes in exam from physics book? |
| Answer» Depends on school<br>I dont think it will Come. In ur school they did those questions then confirm it will come. But ve preparef<br>Yes , as it contains some important questions which might be come onthe exam | |
| 913. |
All derivative question |
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| 914. |
Parallel and perpendicular axis theorem |
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| 915. |
Light travels faster in iron than in air.why? |
| Answer» The closer the molecules are to each other, the less energy it takes for them to pass the sound to each other and the faster sound can travel. It is easier for sound waves to go through solids than through air because the molecules are closer together in solids.Thats why light travels faster in iron than air..... | |
| 916. |
How to prepare for exam of Indian Army |
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| 917. |
What is thermotinamic |
| Answer» Thermodynamics is the branch of physics which is concerned with the relationship between other forms of energy and heat. To be specific, it explains how the thermal energy is converted to or from other forms of energy and how matter is affected by this process. Thermal energy is the energy that comes from heat. This heat is generated by the movement of tiny particles within an object. The faster these particles move, the more heat is generated. | |
| 918. |
stationary wave y=4cos pi x÷3.sin 40 pi t calculate amplitude wavelenth and frequency |
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| 919. |
Are additional exercises given in NCERT are from examination point of view?? |
| Answer» Competitive exams :-yes About ur schl exam that u shld ask to ur teacher. | |
| 920. |
Define and derive Bernoulli\'s principle |
| Answer» It is define as the sum of potential energy, kinetic energy , pressure energy at unit volume is constant | |
| 921. |
Kya 12 th me 11 th se bhi puchha jata hai |
| Answer» Yes , it might be ask from 11th class because it is the basic for 12th class | |
| 922. |
Which modulus determine the stretching of a coils spring? |
| Answer» Young\'s | |
| 923. |
Define doplers effect |
| Answer» the apparent change in the frequency of sound when the source ,observer and the medium are in relative motion are called dopler effect. | |
| 924. |
Dervation for all concept of projectile motion |
| Answer» Object thrown in horizontal direction then object made projectile motion this motion is called projectile motion | |
| 925. |
What are the factors an which coefficient of friction depends ? |
| Answer» 1. Force exerted by the body on the surface .2. Contact surface. If they were rough then friction between their surface is more and if their surface are smooth then friction between them are less . | |
| 926. |
What type of energy is stored in the spring of a watch ? |
| Answer» Potential energy... | |
| 927. |
Graphical representation of Sn=sn-s(n-1)formula |
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| 928. |
Action an reaction forces are equal and opposite but they do not balance each other. Why? |
| Answer» Newton\'s third Law says: For every action, there\'s an equal and opposite reaction.Action and reaction are equal and opposite but do not balance each other this is because the action reaction pair do not act on the same body. Since they don\'t act on the same body we cannot cancel the forces just because they are equal. Thus eventhough, Newton\'s 3rd law says each action has an EQUAL and OPPOSITE reaction they don\'t balance each other.\xa0 | |
| 929. |
important .. derivation.. |
| Answer» Banking of road beding of cyclists | |
| 930. |
Find the value of gamma for diatomic gas? |
| Answer» The ratio of specific heats for a diatomic molecule is usually γ=Cp/Cv=7/5. | |
| 931. |
Interference of waves means what |
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| 932. |
Clausis and kelvin plank statement for 2nd law of thermodynamics? |
| Answer» Kelvin plank statement : No process is possible whose sole result is the absorption of heat from a reservoir and the complete conversion of heat into work.Clausius statement : No process is possible whose sole result is the transfer of heat from a colder object to a hotter object.<br>Kelvin - it is impossible to construct aengine which would convert 100%heat energy into work Plank - it is not passible to dwsign a self acting machine which would transfer heat from cold to hot body unaided by any external agency | |
| 933. |
Given that t=√x+3 of a body . Find the work done on the body if a constant force is acted upon it. |
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| 934. |
Define radius of gyration derive an expression for it |
| Answer» The radius of gyration of a body about a given axis is the perpendicular distance of a point P from the axis, where if whole mass of the body were concentrated, as the body shall have the same moment of inertia as it has with the actual distribution of mass.\xa0Radius of gyration is represented by K.\xa0 | |
| 935. |
Derive an expression for the excess of pressure inside a liquid drop |
| Answer» Consider a liquid drop of radius R and surface tension T.\xa0Due to surface tension the molecules on the surface film experience the net force in inward direction normal to the surface.Therefore there is more pressure inside than outside.Let pi\xa0be the pressure inside the liquid drop and po\xa0be the pressure outside the drop.\xa0Therefore excess of pressure inside the liquid drop is, p = p1– p0Due to excess of pressure inside the liquid drop the free surface of the drop will experience the net force in outward direction due to which the drop will expand.Let the free surface displace by dR under isothermal conditions.\xa0Therefore excess of pressure does the work in displacing the surface and that work will be stored in the form of potential energy.The work done by excess of pressure in displacing the surface is,\xa0dW = Force x displacement = (Excess of pressure x surface area) x displacement of surfaceIncrease in the potential energy is,dU = surface tension x increase in area of the free surfaceThe above expression gives us the pressure inside a liquid drop.\xa0 | |
| 936. |
State first law of thermodynamics. Why cp greater than cv?prove cp-cv equal to R |
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| 937. |
Derive an expression for the work done in an isothermal process |
| Answer» Derive an expression for work done in isothermal process<section data-topic-id="6324" id="topic"><article data-post-id="7452" data-topic-id="6324" data-user-id="2" id="post_1"></article></section> | |
| 938. |
State and prove bernaullies theorem |
| Answer» Statement: For the streamline flow of non-viscous and incompressible liquid, the sum of potential energy, kinetic energy and pressure energy is constant.\xa0Proof:\xa0\xa0Let us consider the ideal liquid of density ρ flowing through the pipe LM of varying cross-section.Let P1\xa0and P2\xa0be the pressures at ends L and M and A1\xa0and A2\xa0be the areas of cross-sections at ends L and M respectively.Let the liquid enter with velocity V1\xa0and leave with velocity v2.\xa0Let A1\xa0> A2.\xa0Now, by equation of continuity,\xa0Since, A1\xa0> A2Therefore,\xa0v2\xa0> v1\xa0and P1\xa0> P2\xa0Let, m be the mass of liquid enetring at end L in time t.\xa0The liquid will cover a distance = v1t\xa0Therefore, the work done by pressure on the liquid at end L in time t is,\xa0W1\xa0= Force\xa0\xa0 = P1A1v1t ... (1)\xa0Since same mass m leaves the pipe at end M in same time t, in which liquid will cover the distance given by\xa0v2t.Therefore, work done by liquid against the force due to pressure P1\xa0is given by,\xa0\xa0 W2\xa0= P2A2v2t ... (2)\xa0Net ork done by pressure on the liquid in time t is,\xa0W = W1\xa0- W2\xa0 =P1A1v1t -\xa0P2A2v2t ... (3)\xa0This work done on liquid by pressure increases it\'s kinetic energy and potential energy.\xa0Increase in K.E of liquid is,\xa0That is,\xa0\xa0 | |
| 939. |
Does gravity affect on pressure in fluids |
| Answer» Fluid pressure can be caused by gravity, acceleration, or forces in a closed container. Since a fluid has no definite shape, its pressure applies in all directions. Fluid pressure can also be amplified through hydraulic mechanisms and changes with the velocity of the fluid. | |
| 940. |
Find the unit vector perpendicular to i+j+k and 3i-4j+5k? |
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| 941. |
Derive refrigerator |
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| 942. |
How we can increase the efficiency of carnot engine? |
| Answer» From the Carnot Efficiency formula, it can be inferred that a maximum of 64% of the fuel energy can go to generation. To make the Carnot efficiency as high as possible, either T^hot should be increased or T^cold (temperature of heat rejection) should be decreased. | |
| 943. |
Is there any Difference between STP and NTP...? |
| Answer» STP : Standard temperature and pressure, abbreviated STP, refers to nominal conditions in the atmosphere at sea level. This value is important to physicists, chemists, engineers, and pilots and navigators.Standard temperature is defined as zero degrees Celsius (0 0C), which translates to 32 degrees Fahrenheit (32 0F) or 273.15 degrees kelvin (273.15 0K). This is essentially the freezing point of pure water at sea level, in air at standard pressure.NTP : Normal Temperature and Pressure - is defined as air at 20oC (293.15 K, 68oF) and 1 atm ( 101.325 kN/m2, 101.325 kPa, 14.7 psia, 0 psig, 29.92 in Hg, 760 torr). Density 1.204 kg/m3 (0.075 pounds per cubic foot | |
| 944. |
Why electron and proton attract each other while electron - electron or proton-proton ? |
| Answer» Because according to faraday mechanical field generated around us so we know that like charge repel each other unlike charge attract<br>Because proton has positive charge and electron has negative charge so they attract each other | |
| 945. |
What is the maximum value of coefficient of performance?? |
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| 946. |
If light yr. Is big than the parsec than parsec will alsobig than the austronomical unit .... |
| Answer» A parsec is greater. It is approximately equal to 3.3 light years.Explanation:Parsecs are the preferred unit used by astronomers when talking about distances. A parsec is defined as the distance that an object would have to be from\xa0the sun\xa0to have a parallax angle of 1" (one arc-second). Therefore, any measurement found using parallax will yield an answer in units of parsecs. This makes the parsec a convenient standard unit for the measurement of large distances in space.A light year on the other hand refers to the distance that light travels during one year. This gives us information, not only about how far the light has travelled, but also how long it has been travelling. Light years are more commonly used in popular science, because it makes more intuitive sense for people who are not familiar with parallax measurement.To put each of these units into perspective;1 parsec=3.1⋅1013 km=1.9⋅1013 mi (approx)1 light year=9.5⋅1012 km=5.9⋅1012 mi\xa0(approx)1 parsec=3.3 light years\xa0(approx) | |
| 947. |
How can i prepare for my class11 examination? |
| Answer» by working hard and making suitable time twble | |
| 948. |
What is gravitationl potential energy |
| Answer» The workdone on bringing a mass from infinity to a point in the gravitational field is said to be Gravitational potential energy at that point. | |
| 949. |
What is neutral charge in battery |
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| 950. |
How to understand earths satellite derivation and g at depth |
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