Saved Bookmarks
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.
| 4601. |
What is the SI unit of work done? |
|
Answer» Joule Joule SI unit of work is joule Work is said to be done when a force applied to an object moves that object.We can calculate work by multiplying the force by the movement of the object.W = F × dThe SI unit of work is the joule (J) Joule ? |
|
| 4602. |
What is the radius of Earth? |
| Answer» 6400km | |
| 4603. |
Write four fundamental forces in the ascending order of their strength? |
| Answer» Gravitational force < weak nuclear force < electromagnetic or motive force < strong nuclear force.\tGravitational Force – Weakest force; but infinite range.\xa0\tWeak Nuclear Force – Next weakest; but short range.\tElectromagnetic Force – Stronger, with infinite range.\tStrong Nuclear Force – Strongest; but short range. | |
| 4604. |
What is conduction of heat transfer |
| Answer» | |
| 4605. |
Explain types of friction force. |
|
Answer» 4 types Following are the friction types which depend on the types of motion:\tStatic Friction: the frictional force that acts between the surfaces when they are at rest with respect to each other.\tSliding Friction: the resistance that is created between any two objects when they are sliding against each other.\tRolling Friction: the force which resists the motion of a ball or wheel and is the weakest types of friction.\tFluid Friction: the friction that exsits between the layers of the fluid when they are moving relative to each other. |
|
| 4606. |
Verify the linear equation for travelling wave y=e to the power b(x-vt) |
| Answer» | |
| 4607. |
S.I unit of Torque. |
|
Answer» Newton metre (Nm) newton meter (joule per radian (J/rad)) newton metre(joule per radian (J/rad)) |
|
| 4608. |
Convert one newton into dyne. |
|
Answer» 1N=10dyne 1N=10*5 Dyne. Dimensional formula of Force F [M1 L1 T-2]So a =1, b=1, c=-2Now because Newton is in m.k.s system,We Have.M1 = 1kg, L1 = 1m, T1 = 1sM2 = 1g, L2 = 1cm, T2 = 1sn1= 1 Newtonn2 = ?Using the formulan2= n1[M1/M2]a [L1/L2]b [T1/T2]cn2= 1 [1kg/1g]1 [1m/1cm]1 [1s/1s]-2n2= 1[1000g/1g]1 [100cm/1cm]1 x1n2= 1000×100 = 100000= 105 dyne |
|
| 4609. |
Factors depends on critical speed |
| Answer» | |
| 4610. |
Three equal masses of m kg are at vertices of equilateral triangle. |
| Answer» Then what, what\'s the Ques? | |
| 4611. |
Derivation of zeroth law of thermodynamics |
| Answer» | |
| 4612. |
Use of Newton\'s laws |
| Answer» Newton\'s law is very important in physics.with the help of Newton\'s law, we can solve many questions and derivatives. | |
| 4613. |
What\'s need of newtan\'s laws of motions in our future |
| Answer» It"s of no use | |
| 4614. |
What is adibatic process |
|
Answer» Heat will be zero that means no heat transfer is called adiabatic process Adiabatic Processes\tAdiabatic is a process in which there is no heat flow takes place between the system and the surroundings.\tThese processes are sudden.\tThe walls of the container should be adiabatic\tFor an adiabatic process of an ideal gas\tFrom Boyle’s law\tPV γ = constantWhere γ = Cp/Cv Specific heat ratioExample: - Hot tea in Thermos flask. It will remain hot as there is no exchange of heat takes place because the walls of thermos is insulating. No heat transfer is called adiabatic process |
|
| 4615. |
What is dynamic lift ? Give example |
| Answer» Dynamic lift is a force that acts on body by vertue of its motion through a fluid .....For example.. during the game of cricket we noticed that I spinning ball deviates from its parabolic trajectory in the air. | |
| 4616. |
i want all formula of physic class 11 |
|
Answer» See NCERT physics appendix Light year There is an app in playstore called physics formula for class 11 and 12. Please do check out |
|
| 4617. |
All theTheorems |
| Answer» | |
| 4618. |
Redox reaction gives heat or not |
|
Answer» It depend whether the reaction is endothermic or exothermic Yes redox reaction gives heat Yes |
|
| 4619. |
Which sample paper book for physics should i buy oswaal or 100 %sucess |
| Answer» Bro Previous Year que. Paper arihant | |
| 4620. |
Why does a piece of wood floating on water source no Brownian motion |
| Answer» Due to buoyant force. | |
| 4621. |
Free fall derivation |
| Answer» | |
| 4622. |
How do we get to know that acceleration is constant or not |
|
Answer» Constant acceleration means equal change in velocity in equal interval of time Also if dv/dt=0 -no change in velocity i.e. acc=0 Acceleration constant means uniform velocity through out the motion. |
|
| 4623. |
Derivation of hydraulic machines. |
| Answer» | |
| 4624. |
Why it is advisiable to bank roads |
|
Answer» It is advisiable to bank roads in order to reduce the dependence on coefficient of friction for turning. It reduces wear and tear of the cycles.it reduces friction. |
|
| 4625. |
What is thermal expansion in isothermal condition |
| Answer» An the solids are found to expand on heating this is called thermal expansion. And there are 3 types of thermal expansion (1)linear expansion (2) Area expansion (3) Volume expansion | |
| 4626. |
What is the dimensions of surface tension |
| Answer» Surface Tension\tSurface tension is the property of the liquid surface which arises due to the fact that surface molecules have extra energy.\tSurface energy is the extra energy which the molecules at the surface have.\tSurface tension is the property of the liquid surface because the molecules have extra energy.\tSurface energy is defined as surface energy per unit area of the liquid surface.\tDenoted by ’S’.\tMathematically :-\tConsider a case in which liquid is enclosed in a movable bar.Slide the bar slightly and it moves some distance (‘d’).There will be increase in the area, (dl) where l=length of the bar.Liquids have two surfaces one on the bar and other above the bar. Therefore area=2(dl)Work done for this change =Fxdisplacement.Surface tension(S)=Surface Energy/areaOr Surface Energy=S x area=Sx2dlTherefore S x 2dl =F x d\t\t\tS = F/2d | |
| 4627. |
What is the relation between force and torq |
|
Answer» Torque is a couple of resistive force Torque =r×F |
|
| 4628. |
What made of this sentence |
| Answer» | |
| 4629. |
Define hydraulic lift |
| Answer» Hydraulic lift works on the primciple of pascal law where 1 lift has larger area of crossection and other is of small area of crossection and pressure is constant | |
| 4630. |
In the oil tin container it is necessary to have only two opening . Why and discuss in detail |
| Answer» | |
| 4631. |
Why the path of launching of a rocket is curve |
| Answer» Because they want to get into the orbit around the earth using as little fuel as possible. OKAY ARE YOU UNDERSTAND MY ANSWER..... | |
| 4632. |
What is bernolio theory |
| Answer» Bernoulli’s Principle\tFor a streamline fluid flow, the sum of the pressure (P), the kinetic energy per unit volume (ρv2/2) and the potential energy per unit volume (ρgh) remain constant.\tMathematically:- P+ ρv2/2 + ρgh = constant\twhere P= pressure ,E./ Volume=1/2mv2/V = 1/2v2(m/V) = 1/2ρv2E./Volume = mgh/V = (m/V)gh = ρgh\t\t | |
| 4633. |
Plot the variations of g with distance r from the center of the earth. |
| Answer» | |
| 4634. |
Assuming earth to be a uniform sphere find expression during of earth interm of \'G\' and g |
|
Answer» g=GM/R^2 May be g=GM/r**2 Jaldi bej do |
|
| 4635. |
Any 2 applications of newton\'s second law???? |
| Answer» The Second law of motion becomes easy if we know an object’s mass and acceleration so that we can find the net force on the object.This concept is useful for blocks and rope problems and also for pulley system problems. Also we need to understand that tension is a force so the net tension of an object is the same as the net force. | |
| 4636. |
Fill up 3.0m/s = _km/hr |
|
Answer» 0.833 =3×3600/1000 m/s = km/hr3 = 1000/36003×3600/1000=10.8 (3*18)/5=10.8km/hr |
|
| 4637. |
Show that the maximum height of any mountain on earth cannot exceed 10 km |
| Answer» | |
| 4638. |
What is the kepler\'s second law of planetary motion |
|
Answer» According to this law, the line joining the sun sweepts out equal area in equal interval of time. And the areal velocity os constant After studying a wealth of planetary data for the motion of the planets about the sun, Johannes Kepler proposed three laws of planetary motion. Kepler\'s second law states. An imaginary line joining a planet and the sun sweeps out an equal area of space in equal amounts of time. Second Law of Kepler is the Law of Area.According to this Law, the line joining the Sun and planet, sweeps out equal areas in equal time interval. The areal velocity is constant. |
|
| 4639. |
What is surface tension ? |
|
Answer» the attractive force exerted upon the surface molecules of a liquid by the molecules beneath that tends to draw the surface molecules into the bulk of the liquid and makes the liquid assume the shape having the least surface area. When a small quantity of water is poured on a clean glass plate, it spreads in all directions in the form of a thin film. But when a small quantity of mercury is poured on the glass plate, it takes the form of a spherical drop. Similarly, if a small quantity of water is poured on a greasy glass plate, it also takes the form of small globules like mercury. This shows that the behavior of liquids is controlled not only by gravitational force (weight) but some other force also acts upon it which depends upon the nature of the surfaces in contact. If the weight of the liquid is negligible then its shape is perfectly spherical. For example, rain drops and soap bubbles are perfectly spherical. We know that for a given volume, the surface area of sphere is least. Hence may say that the free surface of a liquid has a tendency to contract to a minimum possible area. |
|
| 4640. |
To find c.o.m. of equilateral triangle and circle |
|
Answer» The centre of mass of equileteral triangle and circle is placed at geometrical centre Hi i can answer you later |
|
| 4641. |
Stress strain relationship |
|
Answer» Stress/strain = E(constant) Stress is directly proportional to strain Stress/strain=constant(modulus of elasticity) |
|
| 4642. |
Definition of strain and stress |
| Answer» The internal restoring force or deforming force acting per unit area of a deformed body is called Stress.The ratio of amount of change in a body\'s configuration (whether in length or volume) to its original configuration is called Strain. | |
| 4643. |
Three masses of 3kg,4kg,5kg are located at three corners.find the centre of mass of the system |
|
Answer» It is firstly drawn it into Cartesian plane Because it is impossible to explain it This corner is the triangle corner then |
|
| 4644. |
Defference b/w potential energy and kinetic energy. |
| Answer» Kinetic Energy of a body is due to its movement with a certain velocity .And Potential Energy is due to its position at a certain place or height.K.E. = 1/2 m(v)^2 P.E. = mghWhere, m = mass of the bodyv = velocity of the bodyg = acceleration due to gravityh = height (or distance) at which the body is | |
| 4645. |
D-x/x= |
| Answer» If D is differentiation so differentiation of x/x is zero 0 ... | |
| 4646. |
Bernauli theorem proof |
| Answer» | |
| 4647. |
Prove parallel therem |
| Answer» | |
| 4648. |
Explain escape velocity. |
|
Answer» Escape velocity\'s value on earth is 11.2 km/s, on moon is 2.3 km/s and on Jupiter is 60 km/s. \tEscape velocity is the minimum velocity that a body must attain to escape the gravitational field of the earth.\tSuppose if we throw a ball,it will fall back. This is happening due to the force of gravitation exerted on the ball by the surface of the earth due to which the ball is attracted towards the surface of the earth.\tIf we increase the velocity to such an extent that the object which is thrown up will never fall back.This velocity is known as escape velocity. Escape velocity is the minimum velocity with which the body must be projected vertically upward in order that it may just escape the gravitational field of the earth...☺ |
|
| 4649. |
Explain any three observed phenomenon of surface tension |
| Answer» | |
| 4650. |
Omega kya hai? |
|
Answer» Greek ward ITS NOT SPEED ANGULAR VELOCITY Its not speed angular velocity Wrong answer Omega is the speed by which the particle rotate |
|