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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.
| 2701. |
Formula of effective conductivity |
| Answer» | |
| 2702. |
Kinematics?? |
| Answer» It is study of motion<br>Motion-mathematics = calculation related to motion wasn\'t it so simple ¿?<br>Kinematics is the branch of physics which deals with the motion of bodies | |
| 2703. |
Difference Between debye temperature and latent heat |
| Answer» Latent heat is the energy used to change phase of body from one state to another(in this process Temp.=0) | |
| 2704. |
Is class 12 physics very easy? |
| Answer» If you will study properly then not only physics every subjects will be easy. | |
| 2705. |
What is staradian? |
| Answer» It is the SI unit of solid anglesAnd it generally used in 3dimentional figure to find the angles.<br>Steradian\xa0is a unit of measurement for the solid angles.\xa0Steradian\xa0is the angle subtended, at the center of a sphere, by a surface whose magnitude of area is equal to square of the radius of the sphere.The solid angle of a sphere at it\'s centre is 4π\xa0steradians.\xa0 | |
| 2706. |
Dimensional formula of self induction |
| Answer» The magnetic flux is given byϕ=LIThe dimensional formula of self inductance,\xa0[L]=[BA]/[I]\u200b. . . . . .(1)Force,\xa0f=qvB[M1L1T−2]=[TA].[L1T−1].[B][B]=[M1T−2A−1][BA]=[M1L2T−2A−1]From equation (1), we get[ϕ]=[M1L2T−2A−2] | |
| 2707. |
Have you guys half yearly exam near? |
| Answer» yes.....<br>Yes,My exam is near.. | |
| 2708. |
In gravitation chp why we put all masses at the centre |
| Answer» Due to centre of mass!! | |
| 2709. |
The voleum of a cube of side 1cm is equal to.............m^3 |
| Answer» $$100cm = 1m$$ $$1cm = 0.01m$$$$(0.01×0.01×0.01)m= \\frac{1m}{100×100×100}$$$$\\frac{1m}{1000000} = 0.000001m^3$$ | |
| 2710. |
what is the magnitude of direction of force |
| Answer» We will find resultant components of force then magnitude=√{x^2+y^2} | |
| 2711. |
Why does work done a scalar quality? |
| Answer» | |
| 2712. |
Physics? |
| Answer» | |
| 2713. |
What is the principle of homogeneity of dimensions ? |
| Answer» Principle of Homogeneity of Equation/Dimensions -An equation relating physical quantities must have the same dimensions on left hand side as on the right hand side.For example, if we know displacement, s, depends upon initial velocity, u, acceleration,a and time, t.and ask ourselves what must be the equation connecting all these. The principle of homogeneity tells us thatif we write, displacement s on left hand side then on the right hand side, u, a and t must be combined to get displacement dimensions or units. Hences = ut + at2[L] = [LT\xa0-1] [T] + [LT\xa0-2] [T]2[L] = [L] + [L]So that means we can add a length to another length.And we\'ll the resultant quantity with the dimensions of length.As we can see the principle of homogeneity tells us the form of the equation, the exact equation is obtained by theoretical analysis,and we know that the correct equation is,s = ut + at2/2 | |
| 2714. |
Explain Bernoll\'s theorem |
| 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:-\xa0P+ 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 | |
| 2715. |
What is called velocity |
| Answer» The rate of change of displacement is known as velocity.change in positionformula $${X₁-X₀}$$<br>The meaning of velocity of an object can be defined as the rate of change of the object’s position with respect to a frame of reference and time. It might sound complicated but velocity is basically speeding in a specific direction. It is a vector quantity, which means we need both magnitude (speed) and direction to define velocity. The SI unit of it is meter per second (ms-1) if there is a change in magnitude or the direction in the velocity of a body the body is said to be accelerating. | |
| 2716. |
state work energy theorem. |
| Answer» Acc .to this theorem ,Work done=Change in Kinetic energy<br>\xa0Work energy theorem states that the change in kinetic energy of an object is equal to the net work done on it by the net force.Let us suppose that a body is initially at rest and a force\xa0is applied on the body to displace it through\xa0\xa0along the direction of the force. Then, small amount of work done is given by\xa0Also, according to Newton\'s second law of motion, we have\xa0where a is acceleration produced (in the direction of force) on applying the force. Therefore,\xa0\xa0\xa0Now, work done by the force in order to increase its velocity from u (initial velocity) to v (final velocity) is given by\xa0\xa0Hence, work done on a body by a force is equal to the change in its kinetic energy. | |
| 2717. |
Si unit of coefficient of viscosity |
| Answer» The unit of coefficient of viscosity can be understood by defining the coefficient of viscosity.Following is the unit of coefficient of viscosity in different systems:\tSI unit: Ns.m-2\tCGS unit: poise | |
| 2718. |
Define S.I Unit of solid angle?? |
| Answer» steradian<br>Steradian<br>Steradian | |
| 2719. |
What are the dimensions of cofficent of vesocity |
| Answer» M^1 L^-1 T^-1<br>The dimensional formula of Coefficient of Viscosity is given by,M1\xa0L-1\xa0T-1Where,\tM = Mass\tL = Length\tT = Time | |
| 2720. |
Working of hydrolic break✍✍✍✍✍✍✍ |
| Answer» Hydraulic brakes work on the principle of Pascal’s law.\xa0According to this law whenever pressure is applied on fluid it travels uniformly in all the directions.\xa0Therefore when we apply force on a small piston, the pressure gets created which is transmitted through the fluid to a larger piston. As a result of this larger force, uniform braking is applied on all four wheels<br>Okay ?<br>Hydraulic brakes work on the principle of Pascal’s law.\xa0According to this law whenever pressure is applied on fluid it travels uniformly in all the directions.\xa0Therefore when we apply force on a small piston, the pressure gets created which is transmitted through the fluid to a larger piston. As a result of this larger force, uniform braking is applied on all four wheels.\xa0As braking force is generated due to hydraulic pressure, they are known as hydraulic brakes.\xa0Liquids are used instead of gas as liquids are incompressible. | |
| 2721. |
Derive Pascal law |
| Answer» According to Pascal’s law, “The external static pressure applied on a confined liquid is distributed or transmitted evenly throughout the liquid in all directions”.Following is the formula of Pascal law:\tF = PA\tWhere,\tF is the force applied\tP is the pressure transmitted\tA is the cross-sectional area | |
| 2722. |
In which month class 11 exam began?? Any clue |
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| 2723. |
What is min conservation variables |
| Answer» | |
| 2724. |
Write a equation of mass energy equivalence |
| Answer» E=mc^2 | |
| 2725. |
What is called conservation variable |
| Answer» What is called quarks<br>What is called conservation variables | |
| 2726. |
Give approximate rate of 1 AU and 1 light year |
| Answer» 1AU=1.496*10 tuti power11mAnd 1y=9.46*10tuti power 15miter | |
| 2727. |
Kesa hua exam ? |
| Answer» Vese SL mai se practice kro wo qccho book hao phy k liye<br>Ye net chalta hi nhi.. phy mai fimaag bhot lgta hai | |
| 2728. |
Can a body in linear motion be in equilibrium? |
| Answer» Equilibrium means no net force is acting.An object can be in linear motion if the forces acting on it are balanced forces and due to this it is undergoing uniform linear motion.<br>Yes , if net force is 0 | |
| 2729. |
Show that the path of projectile is parabolic in nature. |
| Answer» <br>Half yearly exam ?<br>Test tha kya<br>Itne ques | |
| 2730. |
Calculate the amount of work done in moving a body up a rough inclined plane. |
| Answer» Picture wala right hai<br><br>W =( Fsin theta + mg )s | |
| 2731. |
Find the value of g at height equal to the earth radius and also the centre of the earth |
| Answer» g= 9.8 m/s² | |
| 2732. |
Hai I\'m searching for a friend Someone? |
| Answer» Dont you have school friends<br>?<br>So what...? | |
| 2733. |
what do you mean by unit and dimensions? |
| Answer» Full names of the units, even when they are named after a scientist should not be written with a capital letter. Eg: Newton, watt, ampere, meter.\tThe unit should be written either in full or in agreed symbols only.\tUnits do not take the plural form. Eg: 10 kg but not 10 kgs, 20 w but not 20 ws.\tNo full stop or punctuation mark should be used within or at the end of symbols for units. Eg: 10 W but not 10 W.Dimensions\xa0of a physical quantity are the powers to which the fundamental units are raised to obtain one unit of that quantity. | |
| 2734. |
Apparent weight of a man in a lift / elevator? |
| Answer» nahi bhai.. 2 chapter abhi padhna hai.. ho jayega subah tak? | |
| 2735. |
what do you mean by equilibrium of concurrent forces? |
| Answer» If The sum of three forces acting perpendicular to each other is zero, that is the net force is zero, then it is called equilibrium of concurrent forces. | |
| 2736. |
Calculate the angular speed of the flywheel making 240 revolutions per minute? |
| Answer» Here, `theta =240 xx 2 pi ` radians and `t=60 seconds`.:. Angular speed, ` omega=(theat)/t =(240xx 2 pi)/960) =8 pi rad//s`.<br>2π ×240/60= 8π | |
| 2737. |
Maximum height attained by projectile? |
| Answer» H<br>Hn bbyee ?<br>Accha... Jitna pdha hai itna acche se revision krr Lo....?<br>Thank you ☺... revision ki baat kar rhe maine padha hi nahi h???.. Bss vector wala chapter achhe se padha h.. ?<br>Revision ho gya physics ka..? | |
| 2738. |
Express the derivation for rotational kinetic energy |
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| 2739. |
hoo is anybody here |
| Answer» | |
| 2740. |
What is difference between mN,Nm and nm |
| Answer» nm\xa0stands for nanometer, and1\xa0nm\xa0=10-9\xa0m,\xa0mN\xa0stands for milli - newton, and 1\xa0mN\xa0= 10-3\xa0N,\xa0Nm\xa0stands for Newton metre<br>mN milli newton Nm is newton meternm is nano meter<br>All the three are units of physical quantities, wherenm stands for nanometer, and1 nm =10-9\xa0m,mN stands for milli - newton, and 1 mN = 10-3\xa0N,Nm stands for Newton metre. | |
| 2741. |
20.Write the values of the followings :(a)j.k (b)k.k (c)i.k(d)j.i... |
| Answer» You are from<br>a c and d has answer 0 and b has answer 1 | |
| 2742. |
Find a unit vector parallel to the vector 3ivector + 7j vector + 4k vector |
| Answer» | |
| 2743. |
obtain equations of motion for constant acceleration using method of calculus |
| Answer» Thabkyou<br>she is the best..<br>Let uniform acceleration be aAcceleration is defined as rate of change of velocity ......................(1)where v is velocity of an object at time tBy integrating above ewqn.(1) , we getwhere u is velocity at time t = 0 and v is velocity after time t secondsfrom above integration we get , v - u = a t or v = u + ( a t ) ...................... (2)velocity is defined as rate of change of displacement\xa0\xa0...................(3)Where S is distance travelled.By integrating above equation (2) , we getWhere xo\xa0is initial position and x is position after time tx - xo\xa0= u t + (1/2) a t2\xa0.................. (4)If the object travelled a distance S staring from initial velocity u and attained final velocity v after travelling distance S in time t , then we haveS = (1/2) ( u+v ) t ...............(5)Let us substitute t from eqn.(2) in eqn.(5) as t = [ ( v - u ) / a ] , then we haveS = (1/2) ( u + v ) [ ( v - u ) /a ] or v2\xa0= u2\xa0+ ( 2 a S ) .................. (6)Eqn.(2) , eqn.(4) and eqn.(6) are equations of motion | |
| 2744. |
A ball is thrown vertically , draw it\'s a) velocity - time curve, b) acceleration - time curve |
| Answer» When the ball is thrown vertically upward its velocity decreases as it moves upward due to the gravitational force acting on it downwards and thus the graph slopes downwards with a negative gradient.When it reaches a certain height, that is at a stationary point, the velocity becomes zero and at this point the graph cuts the x axis.The ball then comes back with an increasing velocity from zero to its initial position and at this point the graph slopes downwards from the x axis. | |
| 2745. |
Limiting friction |
| Answer» The maximum value of static friction when the object just begins to move is called limiting friction.<br>Maximum value of static friction<br>The amount of friction that can be applied between two surfaces is limited and if the forces acting on the body are made sufficiently great, the motion will occur. Hence, we can define limiting friction as the maximum value of static friction that comes into play when the body is just at the point of sliding over the surface of another body. Limiting friction is the product of normal force and coefficient of limiting friction. Mathematically, this is represented asF=muNHere,mu\xa0is the coefficient of limiting friction and N is the normal forceThe limiting friction is always opposite to the motion of the object. | |
| 2746. |
Find dx/dy if y=sin(4x-3) |
| Answer» F=m×a | |
| 2747. |
Work definition |
| Answer» When displacement occurs in the direction of applied force it is known as the work done.W=F*s<br>Work is defined as the product of force (F) and the actual distance (S) moved by the body in the direction of application force. It is a scalar quantity.In mathematics, work = force ×distancei.e, W = F×S<br>Work is said to be done when a force applied on the body displaces the body through a certain distance in the direction of applied force.It is measured by the product of the force and the distance moved in the direction of the force, i.e., W = F-S | |
| 2748. |
What is dyne? |
| Answer» Dyne is the cgs unit of force Newton is the SI unit of force 1 N = 10^5 dyne<br>Cgs unit of force<br>Unit of force... | |
| 2749. |
A girl standing on a rotating platform stretches out her arms the moment of inertia of the girl |
| Answer» Do you have the answer ???Means, since the values are not given so it can be....... I = mr² | |
| 2750. |
What is the steel of length |
| Answer» Please ask question with complete information. | |