InterviewSolution
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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.
| 751. |
How can we see a virtual image when it cannot be obtained on a screen? |
| Answer» No, the correct answer is True,a virtual image cannot be taken on screen. But our eye lens forms a real image of (virtual image acting as virtual object)on the retina of our eyes.Thanks for ur answer.<br>Behind the mirror or lens as we see everyday in a mirror | |
| 752. |
It is easy to pull than to push a lawn roller.why? |
| Answer» It is easier to pull a lawn roller than to push it. Explain using the resolution of forces. Answer: The force applied to move a body depends upon effective force applied on it including its weight. As effective weight in the case of pulling is less than in the pushing, less force is required in pulling. | |
| 753. |
Define young modulus of elasticity. Given its unit and dimensions |
| Answer» It is the ratio of normal stress to the longitudinal strain within the elastic limit.Unit- newton per metre square Dimensions- [ML(-1)T(-2)] | |
| 754. |
Difference between rigid and non rigid body on the basis of modulus? |
| Answer» Young’s Modulus Elasticity shows the stiffness of a material. If a material has low Elasticity such as a rubber band you can deform it easily. If a material has high Elasticity such as steel, it is hard to deform. Now rigid body can also be defined with Young’s Modulus. A rigid body is such a body that it has infinite Elasticity. All non rigid materials have different stifnesses(Elasticity), like the previous example of rubber and steel. | |
| 755. |
Derivation of Len\'s formula |
| Answer» | |
| 756. |
why cyclist bend during taking a curve |
| Answer» | |
| 757. |
5 differences between vector and scalar quantities |
| Answer» A scalar quantity has only magnitude, but no direction. Vector quantity has both magnitude and direction. Every scalar quantity is one-dimensional. ... For example, the dot product of two vectors gives only scalar; while, cross product, summation, or subtraction between two vectors results in a vector. | |
| 758. |
Can a body move in a curve path without acceleration? |
| Answer» No | |
| 759. |
Why friction is necessary eve |
| Answer» becoz without friction we cant walk , write on paper and many more things we cant do without friction.. in presence of friction we r able to walk , Run , write etc without it we all will not able to walk properly thats why its necessay and it is evil also becoz to over come friction we need to do work externally and on roads there is wearing and tearing of tyres and due to friction old machine r not able to give their performance best and due to it only nuts of machines also get loose thats why friction is a necessary evil | |
| 760. |
Capillarity |
| Answer» it is a process which takes in liquid due to the prssure differnce acting on different points thats why liquid rises up from one point of material to the another point.<br>it is a process which takes in liquid due to the prssure differnce acting on different points thats why liquid rises up from one point of material to the another point | |
| 761. |
If 1 kg of water at 100°C is vapourised in open atmosphere. Its internal energy is? |
| Answer» Not changed... Bcz temp is same (100°C)Nd u will also get 100 marksAll the best ..?? | |
| 762. |
Is refrigerator a heat engine or anythimg else on principle does it works? |
| Answer» refrigerator is reverse of heat engine In heat engine heat is used from souce at high temp and remaining heat is rejected to sink at low temp whereas in refrigerator heat is taken from sink at low temp and remaining heat is rejected to source at high temp and in refrigerator we have to supply heat from externally becoz heat cant be supplied from low temp to high temp as proved by second law of thermodynamics by kelvin and clausis statement | |
| 763. |
Derive an expression for pressure exerted by an ideal gas on the basis of kinetic theory of gases. |
| Answer» | |
| 764. |
Derivation of Pascal\'s law. |
| Answer» It states that if gravity effect is neglected, the pressure at every point of liquid in equilibrium of rest is same.Proof : Consider two points C and D inside the liquid in a container which is in equilibrium of rest. Imagine a right circular cylinder with axis CD of uniform cross-sectional area A such that points C and D lie on float faces of the cylinder in figureThe liquid inside the cylinder is in equilibrium under the action of forces exerted by the liquid outside the cylinder. These forces are acting every where perpendicular to the surface of the cylinder. Thus force on the flat faces of the cylinder at C and D will perpendicular to the forces on the curved surface of the cylinder. Since the liquid is in equilibrium, therefore, the sum of forces acting on the curved surface of the cylinder must be zero. If P1 and P2 are the pressure at points C and D and F1 and F2 are the forces acting on the flat faces of the cylinder due to liquid,Experimental Proof. Consider a spherical vessel having for cylinderical tubes A, B, C and D each fitted with air tight frictioriless piston of area of corss-section a, a/2, 2a and 3a respectively.Fill the vessel with an incompressible liquid so that no air gap is left inside the vessel and piston fitted in the various cylindrical tubes. Push the piston A with force F.It is seen that all other pistons will be pushed outwards. To keep the pistons at their respective original positions, the force F/2, 2F and 3F respectively required to be applied on pistons of tubes B, C and D respectively to hold them. Now pressure developed on liquid in tubes, B, C and D are F/2, 2F/2a, 3F/3a i.e., such,equal to F/a. This indicates that the pressure applied is transmitted equally to all parts of liquid. This proves Pascal law | |
| 765. |
How much passing marks out of 70 |
| Answer» 24 | |
| 766. |
Why dies a tennis ball bounce higher on hill than in a plains |
| Answer» The value of the force of gravity (g = 9.8m/s2) on hills is less than at the planes as g decreases with increase in height so the weight of tennis ball at hills is less than at plains. In other words, the force with which the earth attracts the ball on hills will be less than at plains. | |
| 767. |
Gatu ki niyam |
| Answer» | |
| 768. |
Define consecutive and non consecutive force |
| Answer» 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.[1] Equivalently, if a particle travels in a closed loop, the net work done (the sum of the force acting along the path multiplied by the displacement) by a conservative force is zero. And vice versa | |
| 769. |
Derive an expression for an pressure exerted by an ideal gas |
| Answer» | |
| 770. |
State and prove equation of continuity |
| Answer» | |
| 771. |
Define calorimetry |
| Answer» \tCalorimetry is defined as heat transfers from a body at a higher temperature to a body at a lower temperature provided there is no loss of heat to the atmosphere. Principle of Calorimetry is heat lost by one body is equal to the heat gained by another body.\tThe Device which measures Calorimetry is known as Calorimeter.\tA calorimeter consists of metallic vessel and a stirrer both are made of same material (copper or aluminium) and the vessel is kept in a wooden jacket so that there is no heat loss .A mercury thermometer can be inserted through a small opening in the outer jacket.<br>Study of heat and temperature.<br>A cheque RS 5000 received from Ashish was dishnoured and was debited to discount account | |
| 772. |
Potential energy of a spring |
| Answer» 1\\2kx^2 | |
| 773. |
Fifth force |
| Answer» The decay of beryllium-8 at some specific angles posed the existence of a new particle. The new particle was called the “X-boson” and was 34 times heavier than the electron. A counter study was done on this matter which suggested that the particle posed the existence of an entirely new force | |
| 774. |
Define degrees of freedom??? |
| Answer» The number of degrees of freedom refers to the number of independent observations in a sample minus the number of population parameters that must be estimated from sample data.Degrees of Freedom can be defined as independent displacements or rotations that specify the orientation of a body or system | |
| 775. |
What is angular impulse momentum principle |
| Answer» | |
| 776. |
Prove PV equal to 1/3 mc² |
| Answer» Use mean square velocity | |
| 777. |
berlonie\'s theoreu |
| Answer» It states that sum of pressure energy kinetic energy and potential energy per unit volume of an incompressible non viscous fluid in a streamline flow remains constant | |
| 778. |
What type of numerical questions come in final exams |
| Answer» I think only book examples are coming | |
| 779. |
In class 11 question are asked from sample paper in final exam or not |
| Answer» Anything can happen in finals no one knows from where questions will come in exam.<br>Doesn\'t understand . | |
| 780. |
Relation between alpha ,beta and gama |
| Answer» Very important for exam Alpha/1=beta/2=gama/3 | |
| 781. |
how to prepare for cbse exam tell me |
| Answer» Just go for class notes nothing is coming from outside | |
| 782. |
Work done during isotharmal prosses |
| Answer» Rachit bata party kab dea raha ja??<br>Refer Pg 306 ncert book 2 | |
| 783. |
We place handles at maximum distance from hinge in a door .give reason |
| Answer» Due to torque because torque depends on directly on distance<br>I think also due to torque<br>It is because if we place handels near the hinge of the door and the surface area between the hinge and the door will be very less due to which it will be very difficult task to open the door easily. To engineers place handles at the maximum distance from hinge due to which surface area of door increases and door opens easily..!! Easy AF ? | |
| 784. |
Circular motion of a car on a banked road |
| Answer» | |
| 785. |
Is centre of mass a reality |
| Answer» Yes, it is<br>No | |
| 786. |
What is resonance..?? |
| Answer» Resonance is the phenomenon of vibratory motion in which a vibrator is set into motion with its natural frequency by another body vibrating with the same frequency. | |
| 787. |
What is degree of freedom..?? |
| Answer» No. Of possible paths permitted by a molecule<br>The number of ways in which particles of the system can absorb energy is called degree of freedom. | |
| 788. |
Find the work done by adiabatic process..?? |
| Answer» Refer page 307 ncert 2nd book<br>nR/Y-1[T²-T¹] | |
| 789. |
Toricellis theorem (velocity of efflux) |
| Answer» | |
| 790. |
Newton law of gravitation |
| Answer» Any body in universe has force of attraction and this force of attraction is directly proportional to the product of masses and inversely proportional to square of distance<br>Any body in universe has force of attraction and this force of attraction is directly proportional to the product of masses and inversely proportional to square of distance | |
| 791. |
Define gravutational potential at a point |
| Answer» Amount of work done in bringing a point mass from infinity to that point against gravitational pull | |
| 792. |
the motion of a particle m is described by y=ut+1/2gt^2. find the force acting on a particle. |
| Answer» | |
| 793. |
Angle of repose का defination in simplest language |
| Answer» The minimum angle that an inclined plane make with the horizontal when a body just placed on it just behind to slide down is called angle of repose.<br>Minimum angle formed by the inclined plane by which a body on the inclined plane just starts to move or tends to move. | |
| 794. |
or what value of m, the vector is perpendicular to? |
| Answer» | |
| 795. |
Define vector quantity |
| Answer» Vector Quantities: Vector quantities refer to the physical quantities characterized by the presence of both magnitude as well as direction. For example, displacement, force, torque, momentum, acceleration, velocity, etc.<br>Which has direction as well as magnitude | |
| 796. |
Guys any easy method to derive carnot cycle |
| Answer» No budddy in my school its imp..<br>May no but carnot cycle is cut from syllabus by CBSE | |
| 797. |
Define gravitiatonal potential |
| Answer» | |
| 798. |
Heat pump |
| Answer» "Heat pump is the machine which convert heat enery into mechanical work." | |
| 799. |
Plz give ideas about some important questions of physics which are asked more in final exam |
| Answer» Kriti has given me yestarday check yestarday chats ☺ | |
| 800. |
Locate the centre of mass of a semicircular disc radius \'R\'. ?? |
| Answer» | |