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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.
| 1051. |
Dimensional formula for momentum |
| Answer» MLT^-1<br>So, the dimensional formula is M^1 L^1 T^-1<br>Momentum=mass ×velocity | |
| 1052. |
Find the expression for weight of body at centre of earth? |
| Answer» The wieght of the body ar centre is 0(zero) | |
| 1053. |
Stefan Boltzmann law |
| Answer» According to Stefan Boltzmann Law, the total radiant heat energy that is emitted by a surface is proportional to fourth power of its absolute temperature. | |
| 1054. |
Why we say 1/299792458 second is 1metre when a light travel distance in vacuum?? |
| Answer» It is a definite value which is fixed and is used all over the world and is also given by an idiot so don t wasre ur rime on it<br>1 | |
| 1055. |
Why physic Is So Hard To Study, Please give me some tips so that I will Pass Physic Class 11. |
| Answer» Physics is not hard if you will give attention in the class then you will get good marks<br>Yes u are right yakshi | |
| 1056. |
Chapter motion in 1D example 3.9 |
| Answer» | |
| 1057. |
Bayals law |
| Answer» The product of pressure and volume is constant for a fixed mass of ideal gas at fixed temprature. | |
| 1058. |
Can anyone tell me about topics to be cover in ch 9 and 10 in physics?? |
| Answer» | |
| 1059. |
Explain stress and strain in detail with its different types. |
| Answer» What are types of stress and strain?Stress: The internal resistance which the body offers to meet with the load is called stress .ie., tendency of a body to resist deformation which is caused by load acting on it.units are N/mm^2 or KN/mm^2stress are classified intoSimple or Direct stressTensioncompressionshearsimple tension and simple compression occur when applied force (load) is linear with the axis of member and simple shear occurs when equal, parallel and opposite forces tend to cause a surface slide relative to adjacent surface.2. Indirect stress:BendingTorsionIn certain loading situations, stresses cause the member to bend resulting in deformation of material such stresses are called indirect stresses.3.Combined stress: Any possible combination of direct and indirect stresses.Strain: The strain is deformation produced by stressTensile strain: strain caused by tensional stress ie ratio of increase in length to actual lengthCompressive strain: strain caused due to compressive stress ie ratio of decrease in length to actual lengthShear strain: in case of shearing load shear strain will be produced which is measured by an angle through which the body deformsVolumetric strain: it is ration between change in volume and original volume of the body | |
| 1060. |
Derive bernaullis theorm? |
| Answer» It states that for the flow of non viscous ideal fluid sum of all the energies per unit volume is constant<br>Statement: For the streamline flow of non viscous and in-compressible liquid, the sum of potential energy, kinetic energy and pressure energy is constant.p/rho++1/2*v^2=constant | |
| 1061. |
What is the best way to get a elasticity |
| Answer» | |
| 1062. |
Last year mcq paper of physics.. lpz tell me |
| Answer» | |
| 1063. |
Last year mcq paper of physics |
| Answer» | |
| 1064. |
Expression for work done by a spring force |
| Answer» -kx^2/2<br>(kx²)/2 | |
| 1065. |
Theory Weightage required to pass in kvs 11th Mau |
| Answer» | |
| 1066. |
Sir what is radius of gyration? |
| Answer» The formula of moment inertia in terms of the radius of gyration is given as follows:I\xa0=\xa0mk2 (1)where\xa0I\xa0is the moment of inertia and\xa0m\xa0is the mass of the bodyAccordingly, the radius of gyration is given as followsk=√I/m (2)The unit of radius of gyration is mm. By knowing the radius of gyration, one can find the moment of inertia of any complex body equation (1) without any hassle.Consider a body having\xa0n\xa0number of particles each having a mass of\xa0m. Let the perpendicular distance from the axis of rotation be given by\xa0r1,\xa0r2,\xa0r3,…,rn. We know that the moment of inertia in terms of radius of gyration is given by the equation (1). Substituting the values in the equation, we get the moment of inertia\xa0of the body as follows………… (3)If all the particles have the same mass then equation (3) becomesWe can write mn as M which signifies the total mass of the body. Now the equation becomes………… (4)From equation (4), we getFrom the above equation, we can infer that the radius of gyration can also be defined as the root mean square distance of various particle of the body from the axis of rotation. | |
| 1067. |
Show that the time period of a planet is proportional to the 3/2 power of the radius of its orbit. |
| Answer» | |
| 1068. |
Limitations of first law of thermodynamics ???? ?? |
| Answer» Thanks Ayushi<br>The limitations of the first law of thermodynamics are: (i) There is no indication available as regards the direction in which the change takes place. (¡¡) first law of thermodynamics does not provide a clear idea about the direction of absorption or evolution of heat. (iii) It does not give any idea about the extent to which the change takes place. | |
| 1069. |
What is resonance ? What do solders go out of step while crossing a bridge |
| Answer» The phenomenon in which two or more structures can be written fir a compoundb, but none of them represents it accurately, is reffered to aa resonance. More the resonating structure, more the stability of compound | |
| 1070. |
Relationship between poise and decapoise |
| Answer» 1 decapoise = 10 poise<br>1Decapoise=10 poise<br>1Decapoise =10 poise | |
| 1071. |
What is r.m.s. in kinetic theory of gases???? |
| Answer» Root mean square velocity<br>Root 3RT/M<br>√sq of observation / total no. | |
| 1072. |
Dimension formula of frequency?? |
| Answer» F= 1/t hence dimensional formula is T^-1<br>Dimension formula for frequency is T ^-1 | |
| 1073. |
Magnitude of force is equal to the magnitude of mass when the acceleration is equal to??????? |
| Answer» As we know F= MA, if M=F then then F/M=A and A is 1 ms^-2..... | |
| 1074. |
Derive Newton\'s law of gravitation from Kepler\'s third law of planetary motion |
| Answer» F=mv^2/rBut orbital vel isv=circumference/time=2πr/TBy putting value of v in first eqn we getF=m/r*(2πr/T)^2=4π^2mr/T^2Now by putting Kepler\'s law T^2=kr^3in above eqn we getF=4π^2mr/kr^3As the force b/w the sun and the planets is mutual,it should also be proportional to the mass M of the sun.4π^2/k is proportional to M so,4π^2/k=GMSo F=GMm/r^2 | |
| 1075. |
How much work is done by mass m moving once around the horizontal circle of radius |
| Answer» So multiply it as Work done - force × displacement<br>Perimeter of circle - distance and force - MA | |
| 1076. |
Does the work done is moving a body depend upon how fast a body move |
| Answer» Nope work done does not depend on velocity( means how fast is obj moving) ......it depends upon change in velocity i.e. acceleration ......because work done= F×d.....and F= m×a .....therefore if acceleration will inc. then F will inc. similarly W will inc.....hope its clear .....well ye mere papa ka name h??? | |
| 1077. |
Relation between "g" & "G" factors influencing "g" escape velocity |
| Answer» | |
| 1078. |
Speed of light in vaccum |
| Answer» 29792458 m/s In absolute Vacccum<br>Speed of light in vaccum is 300,000 km/s<br>3×10^8 m/s | |
| 1079. |
What is difference between mN ,Nm& MN? |
| Answer» 1)mN:mN- milli Newton - smaller SI unit of Force which will be equal to thousandth of a newton\xa01mN=0.001N2)Nm:Nm-- Newton meter\xa0Newton Meter is the SI unit of work Done.3)nm:nm - nanometer\xa01nm=10⁻⁹m | |
| 1080. |
What is the marking scheme of chapters? |
| Answer» | |
| 1081. |
Find a &b in vanderwaal\'s equation?describe briefly. |
| Answer» The\xa0van der Waals equation\xa0is an equation of state\xa0for a fluid\xa0composed of particles that have a non-zero volume and a pairwise attractive inter-particle\xa0force\xa0(such as the van der Waals force). The equation isPhysical significance of ‘a’:\xa0‘a’ is a measure of the magnitude of intermolecular attractive forces between the particlesPhysical significance of ‘b’:‘b’ is the volume excluded by a mole of particles p is the pressure of fluidV is the total volume of container containing the fluid | |
| 1082. |
Friends please share your timetable for exm prepration as final exams are near. |
| Answer» But dued by comparing our own timetable with others can help us have an ideal timetable.<br>Others time table make you frustrated as they are ideal for them<br>Hey everyone have their own time table as per their convenient. So by taking a view over your daily routine make your own time table as per yours convenience. Best of luck | |
| 1083. |
why all oscillation are not shm? |
| Answer» Because every oscillatory motion is periodic but every periodic motion is not oscillatory | |
| 1084. |
Hey koi h kya???☺️☺️? tell me ... What is quasi-static system??? |
| Answer» A thermodynamic process that happens slowly enough for system to remain in internal equilibrium is called quasi static system | |
| 1085. |
explain heat engine in detail |
| Answer» i read notes and then i solve question<br>A heat engine is a system that convert heat or thermal energy --- C.E.then to M.E. which can then be used for mechanical work. It does this by bringing a working substance from a higher state temperature to a lower state temperature. A heat source generates thermal energy that brings the working substance to the high temperature state. The working substance generates works in the working body of engine while transferring heat to the colder sink untill it reaches a low temperature state. During this process T.E. is converted into work by exploitation the properties of working substance. The working substance can be any system with a non zero heat capacity but it usually is a gas or liquid . During this process a lot of heat is lost to the surrounding and so cannot be converted to work<br>from allen kota<br>i solve etoos paper<br>Nancy plz if possible than help me....I know u r preparing for jee....so I want to ask that....when u r solving any question of competative level for example in physics.....so How to proceed in such that of questions??....means what are things that should keep in the mind during solving?? .....as I m not so much good in solving that types of questions.....soo if u can then give me some idea about it... | |
| 1086. |
difference between conduction convection and radiation |
| Answer» Reflectance - The ratio of amount of thermal energy reflected by a body in a certain time to total amount of thermal enery falling upon the body in the same time R = r/QAbsorbtance - The ratio of the amount of thermal energy absorbed by a body in a certain time to the total time of the thermal energy incident upon the body in same timea = A/QTransmittance - The ratio of the amount of thermal energy transmitted by a body in a certain time to the total amount of thermal radiation incident on its in the same timet = T/Q | |
| 1087. |
What do you understand by total internal reflection |
| Answer» | |
| 1088. |
Prove dimensionlly velocity =coefficient of viscosity, density, diameter |
| Answer» | |
| 1089. |
Toppest weightage chapters |
| Answer» Ch straight lines,binomials,conic sections,sequence and series,complex numbers last and main one is trigonometry<br>ch 7, 12 , 10<br>All | |
| 1090. |
Maximum marks covering chapter in final exams and its imp. topics ? |
| Answer» Vector, 2nd law of motion, work energy theorem, poyential energy stored in a stretched spring, elastic collision in 2-D, SHM, percentage error,<br>Kinematics, dynamic and shm are important topics | |
| 1091. |
What is the area of velocity -time graph? |
| Answer» Distance and displacement both<br>Displacement<br>Displacement<br>I think the answer is :- Displacement......? | |
| 1092. |
What is meniscus? AND its shape. |
| Answer» The curved upper surface of a liquid in a tube its shape is concave or convex. Liquid wets the surface concave meniscus. Liquid does not wets the surface convex meniscus. | |
| 1093. |
What are systematic error?Name 2 sources of them. |
| Answer» | |
| 1094. |
please i want explanation on toricelli\'s. law and. venturimeter |
| Answer» Venturimeter is used to measure the rate of flow of liquid and speed of incompressible liquid And in this firstly use continuity equation then use bernoulli theorem for horizontal flow of liquid | |
| 1095. |
What is wet |
| Answer» | |
| 1096. |
Why steel is more elastic than rubber?? |
| Answer» Because steel is more elastic than rubber because steel comes back to its original shape faster than rubber when the deforming forces are removed. Hope this will help u :-):-):-)<br>Because the young\'s modulus of steel is more than of steel<br>Because youngs modulus of steal is more than rubber | |
| 1097. |
Dimension of strain |
| Answer» Dimensionless<br>Dimension less quantity<br>Strain is a dimensionless quantity.<br>Dimensionless<br>dimensionless<br>M0 L0 T0. Basically its dimensionless | |
| 1098. |
Which is more elastic . Rubber or steel |
| Answer» Steel is more elastic than rubber because steel comes back to its original shape faster than rubber when the deforming forces are removed. | |
| 1099. |
What is the other name of universal law of gravitation |
| Answer» | |
| 1100. |
What is value of angular speed of one revolution ? |
| Answer» Angular speed is the rate at which an object changes its angle (measured) in radians, in a given time period. Angular speed has a magnitude (a value) only.Angular speed = (final angle) - (initial angle) / time = change in position/timeω = θ /tω = angular speed in radians/secθ = angle in radians (2π radians = 360 degrees)t = time, sec | |