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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.
| 10001. |
Define the term cp and cv. Derive the relation between cp and cv |
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Answer» Cp is specific heat capacity (heat required to inc. temp of one mole of substance by one degree celsius) at constant pressure and Cv is specific heat capacity at constant volume. Relation between Cp and Cv is - Cp-Cv=R where R is universal gas constant and its value is fixed CP GREATER THEN CV |
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| 10002. |
Prove that cp-cv=r |
| Answer» Cp - Cv =R | |
| 10003. |
Write the two physical quantities whose dimension are same name |
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Answer» (1) Velocity and speed (2) Work and energy Force ,acceleration, velocity ,pressure |
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| 10004. |
What is rectilinear propgation of light? |
| Answer» It means that light needs medium for travelling .. | |
| 10005. |
Bernoille theoram |
| Answer» Acc. to Bernoulli’s theorem, for an incompressible non - Viscous liquid undergoing steady flow the total energy of liquid at all points is constant. | |
| 10006. |
Define avogardo number |
| Answer» Avogadro number is the number of atoms in 12 gm of\xa06C12\xa0isotope of carbon.\xa0Numerical value of Avogadro number is 6.023 x 1023. | |
| 10007. |
Define Work energy theorm |
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Answer» The work energy theorem states that the change in kinetic energy of particle is equal to net work done by all the forces acting on it The change in kinetic energy is the equal to the woerk done on it is work energy theorem |
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| 10008. |
Law of coservation of linear momentum |
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Answer» Law of conservation of linear momentum states that the linear momentum of the system remain conserved during whole motion Conservation of linear momentum expresses the fact that a body or system of bodies in motion retains its total momentum, the product of mass and vector velocity, unless an external force is applied to it. |
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| 10009. |
Which type of mirror is used in vehicles for rear view?? |
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Answer» Convex mirror convex Convex mirror Convex |
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| 10010. |
Convert 1newton into dyne |
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Answer» Esko yaad karne ka acha tarika hai....."Ek Newton colony hai...jaha 10 number wale quater mai ,5 dyne rahti hai"?..... hope it works 1N =10^5 dyne |
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| 10011. |
Why Cp>CV? |
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| 10012. |
The time of revolution around the earth of communication satellite INSAT-11B is |
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| 10013. |
A disc of radius 2root2m is rotating about it own axis .Calculate its radius of gyaration.. |
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| 10014. |
State in detail , Newton law of cooling? |
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| 10015. |
Derive equation of continuity |
| Answer» a steady flow process - flow where the flow rate do not change over time - through a control volume where the stored mass in the control volume do not change - implements thatinflow equals outflowThis statement is called the Equation of Continuity. Common application where the Equation of Continuity are used are pipes, tubes and ducts with flowing fluids or gases, rivers, overall processes as power plants, diaries, logistics in general, roads, computer networks and semiconductor technology and more.The Equation of Continuity and can be expressed as:m = ρi1 vi1 Ai1 + ρi2 vi2 Ai2 +..+ ρin vin Aim = ρo1 vo1 Ao1 + ρo2 vo2 Ao2 +..+ ρom vom Aom (1)wherem = mass flow rate (kg/s)ρ = density (kg/m3)v = speed (m/s)A = area (m2)With uniform density equation (1) can be modified toq = vi1 Ai1 + vi2 Ai2 +..+ vin Aim = vo1 Ao1 + vo2 Ao2 +..+ vom Aom (2)whereq = flow rate (m3/s)ρi1 = ρi2 = . . = ρin = ρo1 = ρo2 = . .= ρom. | |
| 10016. |
What is the basic condition for the motion of a particle to. Be s.h.m |
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Answer» The acceleration of the body should be directly proportional to displacement from the fixed position or mean position and should be directed to that pointi.e.a α yor,a=-ky Acceleration is directly proportional to -ve of displacement |
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| 10017. |
What is the si unit of power |
| Answer» Watt | |
| 10018. |
Give practical unit of power? |
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Answer» Horse power Watt |
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| 10019. |
What is escape speed |
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Answer» It is not virus actually it is virtue When we give the binding energy to a particle then it total energy becomes 0 or if we give more energy then binding energy then it\'s total energy become positive (however no system in universe has positive energy) so a total 0 energy means that the particle has escaped the gravitational pull of a system. So in this case the total potential energy of a particle but the virus of the system in which it is present is converted into kinetic energy and the speed with which the particle escapes the gravitational pull or the opposing force is called the escape velocity. |
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| 10020. |
how a ballet dancer does take the advantage of principle of conservation of angular momentum |
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| 10021. |
What will be length of antenna for frequency 3×10000 hz |
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| 10022. |
Define and derieve the mayor\'s formula |
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| 10023. |
Calculate the surface area of a solid cylinder of diameter 4cm and height 20 cm in mm.sq |
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| 10024. |
A 120 g mass has velocity of v(vector)=(2i^ ➕5j^) m/s at a certain instant t . What is the k. E. |
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| 10025. |
Why does cricket players lower his hands while catching a ball |
| Answer» While catching a ball, a cricket player lowers his hands, because by doing so, he increases the time of catch. That is, the person increases the time to bring about a given change in momentum, and hence rate of change of momentum decreases. | |
| 10026. |
Will ray optics come in class 12 2019-20 curriculum |
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Answer» No..... No bhai Abhi new syllabus nh aaya hai...... I think no |
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| 10027. |
What is coefficient of kinetic friction |
| Answer» Coefficient of kinetic friction is a well known word in physics. When an object is in motion, the resisting force will try to stop the motion of the object. The friction occurs between the two surfaces when they are in motion relatively to each other. The friction force between the surfaces transforms the kinetic energy into heat energy. From the coefficient of friction, the idea of the roughness of the surface can be determined.To measure the frictional force, coefficient of friction is used. There are three types of coefficient of frictions i.e. coefficient of kinetic friction, coefficient of static friction and coefficient of rolling friction.Here, the topic is coefficient of kinetic friction. The expression for the coefficient of kinetic friction is,Here,\xa0\xa0is the kinetic friction force,\xa0\xa0is the coefficient of kinetic friction and\xa0\xa0is the normal force acting on the object.Thus, the coefficient of friction between the two surfaces can be defined as the ratio of the frictional force between the object and the surface to the normal force action on the object.The coefficient of kinetic friction has no unit as the coefficient of kinetic friction is the ratio of two forces.When the coefficient of friction value is high, the stopping distance of the moving object will become less. On the other hand, if the coefficient of friction value is low, the stopping distance of the moving object will become high. | |
| 10028. |
Define Bulk modulus of a material. |
| Answer» Bulk Modulus\tBulk modulus is the ratio of hydraulic stress to the corresponding hydraulic strain.\tDenoted by ‘B’\tB = -p/(ΔV/V)\xa0\tWhere p =hydraulic stress, ΔV/V = hydraulic strain(-) ive signs show that the increase in pressure results in decrease in volume.\tS.I. Unit :- N/m2 or Pascal(Pa)\tB(solids) > B(liquids) >B(gases) | |
| 10029. |
The length of table is measured as 2.5m and 2.54m.which of the two measurement is more accurate |
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| 10030. |
Prove pascal\'s law |
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| 10031. |
How to solve √60÷6.9×10³It is 10 raise to minus 3 |
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| 10032. |
Which steam is easy bio or maths |
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Answer» Bio is easier I think maths is more easy than biology. According to me.... Maths is more easy than biology..... Because I have both subjects..... Bio loge to sochoge aap maths leta mai kyu bio liya hun or maths leta to sochte aap kyu bio liye hunMai to yhi sochti hun bio le kr Haan plzz reply i also need ur expert advice |
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| 10033. |
What is the new syllabus for 2019-2020 physics |
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| 10034. |
Explain magnus effect on the basis of bernoulli principle |
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| 10035. |
Which type of questions are asked in compartment exam.plz help |
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Answer» Easy one important important kr lo I don\'t know |
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| 10036. |
What is elastic limit of a body? |
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| 10037. |
Oscillating particle |
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| 10038. |
Does anybody have last years compartment exam question paper |
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| 10039. |
Why newton\'s law of gravitation is said to be the universal law? |
| Answer» Because its value same everywhere in the universe | |
| 10040. |
Newtons third law |
| Answer» Newton’s Third LawTo every action, there is always an equal and opposite reaction.For example, when you hold the ball, a force acts on the ball (Action), and an equal and opposite force acts on your hand (Reaction).\tAction & Reaction forces always act on different bodies\tFAB = FBAFAB: Force acting on A by BFBA: Force acting on B by A\t\t\tAction & Reaction forces occur at the same instant | |
| 10041. |
Explain sea breeze. |
| Answer» This process takes place for the duration of the day. Both the sea, as well as the land surface is heated up by the sun. The sea heats up slower than the land because it has a much higher heat capacity. Thus, the temperature over the land surface increases, in turn, heating up the air around it. An expansion occurs in the less dense warm air and an area over the land having low pressure is developed. At the same time on the top of the sea, a high-pressure area develops. Due to the difference in pressure and the air flows from the high pressure over the sea to the low pressure over the land. This flow of air from the sea to the land is termed as the sea breeze. | |
| 10042. |
Can acceleration be produced without doing any work? Give example |
| Answer» Yes, centripetal force causes acceleration but no work is done by the force. A\xa0centripetal force\xa0is a force that makes a body follow a curved path. Its direction is always orthogonal to the motion of the body and towards the fixed point of the instantaneous center of curvature of the path. Since the direction is always orthogonal(perpendicular) work done is zero. | |
| 10043. |
What are ductile material? |
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Answer» Which can be drawn into wires.. Ductile material : Ductile materials are materials that can be plastically twisted with no crack. They have the tendency to hold the deformation that occurs in the plastic region. If tensile force is applied, these materials can be stretched into a wire, but if compressive force is applied, they can be deformed into sheets. Common ductile materials are copper, aluminum, and steel. |
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| 10044. |
All important formula for all chapter to solve numerical problem |
| Answer» https://www.google.com/amp/s/www.vedantu.com/formula/cbse-class-11-physics-formulasGo to the website given above????? you\'ll get all formulas from ch.5 to ch.15 | |
| 10045. |
Can modulus A vector + B vector modulus = modulus A vector - B vector modulus |
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| 10046. |
Evaluate (999)¹/³ upto 4 places pf decimal |
| Answer» 9.9966 | |
| 10047. |
Example 1.6 of chapter electric charges and feild |
| Answer» Please post the question correcy. And ask, POSTED BY EXPERT!! | |
| 10048. |
Defind Burnout speed of the rocket and write expression for it |
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| 10049. |
kp kc |
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| 10050. |
A cricket player lower his hands, while catching a ball why ? |
| Answer» A cricket player lowers his hands while catching a fast moving ball because this action helps in preventing injury to the hands. As a fast moving ball has a large momentum . In stopping (or catching) the ball its momentum is reduced to zero. Now , when a player moves back his hands on catching the fast ball , then the time taken to reduce the momentum of the ball is increased . Due to more time taken to stop the ball , the rate of change of momentum of the ball is decreased and hence a small force is exerted on the hands of player. So , they do not get hurt. | |