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    • Posted by Surabhi Singh 7 years, 1 month ago

    CBSE > Class 11 > Physics
    • 1 answers

    Gaurav Seth 7 years, 1 month ago

    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 figure

    The 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

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    • Posted by Krishna Baghel 7 years, 1 month ago

    CBSE > Class 11 > Physics
    • 0 answers
    ANSWER

    • Posted by Roshan Jha 7 years, 1 month ago

    CBSE > Class 11 > Physics
    • 1 answers

    Talib Gazi 7 years, 1 month ago

    24

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    • Posted by Puneet Rathore 7 years, 1 month ago

    CBSE > Class 11 > Physics
    • 1 answers

    Yogita Ingle 7 years, 1 month ago

    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.

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    • Posted by Manish Mandavi 7 years, 1 month ago

    CBSE > Class 11 > Physics
    • 0 answers
    ANSWER

    • Posted by Patel Saurav 7 years, 1 month ago

    CBSE > Class 11 > Physics
    • 1 answers

    Hemant Tiwari 7 years, 1 month ago

    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

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    • Posted by Sunidhi Sharma 7 years, 1 month ago

    CBSE > Class 11 > Physics
    • 1 answers

    Hemant Tiwari 7 years, 1 month ago

    It is Mayer's equation. Derivation: ΔU = ΔQ + ΔW ΔU = Cv ΔT (At pressure is constant) ΔQ = Cp ΔT (At pressure is constant) ΔW = -P ΔV (Negative since the calculation been complete) Pv = RT (1 mole of gas) Because of pressure is constant, R is also constant Change in V will make change in T PΔV = R ΔT Cv ΔT = CpΔT - RΔT Divided by ΔT Cv = Cp - R Cp - Cv = R

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    • Posted by Abhay Sanjay 7 years, 1 month ago

    CBSE > Class 11 > Physics
    • 1 answers

    Siddharth Kumar 7 years, 1 month ago

    There are 4 forces-Gravitational, weak, nuclear and electromagnet forces.nuclear force is strongest and gravitational is longest ranged forces

    1Thank You

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    • Posted by Siddharth Kumar 7 years, 1 month ago

    CBSE > Class 11 > Physics
    • 4 answers

    Anisha Sharma 7 years, 1 month ago

    hemant...... In my physics exam, question of telescope and microscope came for 5 marks... In ray optics.... And these topics are definitely going to come in exam of any school..... Okk

    0Thank You

    Shreya Dixit 7 years, 1 month ago

    Len formula is also a imp derivative

    0Thank You

    Hemant Tiwari 7 years, 1 month ago

    Telescope, microscope and prism is not coming in exam

    0Thank You

    Anisha Sharma 7 years, 1 month ago

    In ray optics telescope, microscope,prism and in waves and oscillations dopler effect, mayer's formula work done in isothermal and adiabatic condition, two types of waves, newton's law at isothermal condition And Laplace correction formula at Adiabatic condition... Are important topics

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    • Posted by Aryan Singh 7 years, 1 month ago

    CBSE > Class 11 > Physics
    • 0 answers
    ANSWER

    • Posted by Md Faisal 7 years, 1 month ago

    CBSE > Class 11 > Physics
    • 0 answers
    ANSWER

    • Posted by Studys Yadav 7 years, 1 month ago

    CBSE > Class 11 > Physics
    • 3 answers

    Yogita Ingle 7 years, 1 month ago

    • Calorimetry 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.
    • The Device which measures Calorimetry is known as Calorimeter.
    • A 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.

    0Thank You

    Muskan Khan 7 years, 1 month ago

    Study of heat and temperature.

    0Thank You

    Avinash Manikpuri 7 years, 1 month ago

    A cheque RS 5000 received from Ashish was dishnoured and was debited to discount account

    0Thank You

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    • Posted by Ishika Kashyap . Dodoli 7 years, 1 month ago

    CBSE > Class 11 > Physics
    • 1 answers

    Kriti Sharma 7 years, 1 month ago

    1\2kx^2

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    • Posted by Vishal Rana 7 years, 1 month ago

    CBSE > Class 11 > Physics
    • 1 answers

    Hemant Tiwari 7 years, 1 month ago

    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

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    • Posted by Lokesh V 7 years, 1 month ago

    CBSE > Class 11 > Physics
    • 2 answers

    Muskan Khan 7 years, 1 month ago

    Substance which have large value of strain for small stress likewise Aorta.

    0Thank You

    Yogita Ingle 7 years, 1 month ago

    The elastic substances that can be subjected to large strain without breaking are called elastomers.
    or
    The substance which can be stretched to large values of strain are called elastomers, e.g., elastic tissue of aorta, the largest artery carrying blood from the heart.

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    • Posted by Kriti Sharma 7 years, 1 month ago

    CBSE > Class 11 > Physics
    • 5 answers

    Sachin B 7 years, 1 month ago

    In the practical examination along with experiments you have to face viva voce from the internal / external examiner. It is just to know your depth of knowledge and understanding of the subject. Based on your performance you will be credited with the deserving score. Do prepare well. The possible questions are as under. Please remember these questions will be in continuation to your response to the examiner's queries: 1) Why are the resistance used in a resistance box is like 1,2,2,5,10,20,20,50,100,200,200,500,1000,2000,5000 etc? 2) Why wire is double folded in resistance box? 3) Name the physical quantities to be kept constant for Ohm's law to be true? 4) State the principle of a potentiometer? 5) How can we increase the sensitivity of a potentiometer? 6) Define figure of merit of a galvanometer? Which has more resistance, a galvanometer or a millimeter? 7) How does an LED emit light? 8) What is the difference between an ordinary diode and an LED? 9) Define principle axis of a convex lens? 10) What happens to the focal length of a concave mirror if it is immersed in water? 11) What are the factors affecting the internal resistance of a cell? 12) What are the differences between primary and secondary cell? 13) Why can't we use a dry cell for starting a car? 14) Define spherical aberration and draw diagram to show it in case of a concave mirror? 15) What is parallax? How is it removed? 16) Define dispersion of light, give its cause? 17) Show dispersion of white light into seven colors? 18) Define lateral displacements and give the factor on which it depends? 19) Define critical angle and deduce the relstion between refractive index and critical angle? 20) Explain U-V graph in case of image formation in a convex lens? 21) Distinguish between primary and secondary cell, give two differences? 22) How does rheostat act as a variable resistor, potential divider? Illustrate with a diagram? 23) What is a non inductive coil? Give one special feature of non inductive cool? 24) Draw a neat and label diagram of Leclanche cell? 25) Write chemical equation in Daniel cell? 26) Why is the emf of auxiliary battery greater than the emf to be measured? 27) Why are standard resistances made up of constantan and Manganin? 28) Define figure of merit and give its SI unit?

    2Thank You

    Kriti Sharma 7 years, 1 month ago

    Thanks anisha and divyansh.

    2Thank You

    Anisha Sharma 7 years, 1 month ago

    Your teacher will ask you questions related to practical given to you for your written practical.... Questions like least count, pitch, refractive index, dispersion, scattering, and remember learn all the formulas of the practicals given in practical book.... Also questions will be asked from your whole physics syllabus... Like work energy theorem, stationery waves, dopler effect, newton's all three laws, capillary action and gravitational law.... And much more formulas...best of luck kriti... ????

    4Thank You

    Kanishka Rana 7 years, 1 month ago

    Which types of waves are there in sono meter

    1Thank You

    Kriti Sharma 7 years, 1 month ago

    Answer

    0Thank You

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    • Posted by Rajdeep Tripathi 7 years, 1 month ago

    CBSE > Class 11 > Physics
    • 4 answers

    Rajdeep Tripathi 7 years ago

    Result last march

    1Thank You

    Rajdeep Tripathi 7 years ago

    Not too bad not too good but alas it 11th

    1Thank You

    Čůťê Ğīřł ? ? 7 years, 1 month ago

    Happy holidays !!?

    1Thank You

    Kriti Sharma 7 years, 1 month ago

    How was all papers dude .when is your result now.

    1Thank You

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    • Posted by Additri M 7 years, 1 month ago

    CBSE > Class 11 > Physics
    • 1 answers

    Yogita Ingle 7 years, 1 month ago

    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

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    • Posted by Swaroopa Rose 7 years, 1 month ago

    CBSE > Class 11 > Physics
    • 0 answers
    ANSWER

    • Posted by Yukta Ratnaparkhi 7 years, 1 month ago

    CBSE > Class 11 > Physics
    • 1 answers

    Krittika Kar 7 years, 1 month ago

    √3RT1/M1 = √3RT2/M2 =>T1/M1= T2/M2 =>T1=T2×M1/M2 ={(147+273K)×2}÷28 =(420×2)÷28 = 420/14K =30K

    2Thank You

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    • Posted by Ritik Bhardwaj 7 years, 1 month ago

    CBSE > Class 11 > Physics
    • 1 answers

    Abhishek Yadav 7 years, 1 month ago

    Gamma

    0Thank You

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    • Posted by Sachin Raj 7 years, 1 month ago

    CBSE > Class 11 > Physics
    • 1 answers

    Hemant Tiwari 7 years, 1 month ago

    Use mean square velocity

    0Thank You

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    • Posted by Nazrul Khan 7 years, 1 month ago

    CBSE > Class 11 > Physics
    • 1 answers

    Hemant Tiwari 7 years, 1 month ago

    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

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    • Posted by Likhitha Likhi 7 years, 1 month ago

    CBSE > Class 11 > Physics
    • 1 answers

    Hemant Tiwari 7 years, 1 month ago

    I think only book examples are coming

    1Thank You

    ANSWER

    • Posted by Shaurya Jain 7 years, 1 month ago

    CBSE > Class 11 > Physics
    • 2 answers

    Muskan Khan 7 years, 1 month ago

    Anything can happen in finals no one knows from where questions will come in exam.

    1Thank You

    Hemant Tiwari 7 years, 1 month ago

    Doesn't understand .

    0Thank You

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    • Posted by Mahak Jindal 7 years, 1 month ago

    CBSE > Class 11 > Physics
    • 2 answers

    Gautam Yadav 7 years, 1 month ago

    An object is thrown by initial velocity and move under gravity is called Projectile

    3Thank You

    Ritik Bhardwaj 7 years, 1 month ago

    A body which projected not in vertical direction or in horizontal direction called projectile

    3Thank You

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    • Posted by Sukhwinder Singh 7 years, 1 month ago

    CBSE > Class 11 > Physics
    • 1 answers

    Ankit Sangwan 7 years, 1 month ago

    Very important for exam Alpha/1=beta/2=gama/3

    1Thank You

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    • Posted by Rishiraj Singh Sikarwar 7 years, 1 month ago

    CBSE > Class 11 > Physics
    • 1 answers

    Hemant Tiwari 7 years, 1 month ago

    Just go through ncert completely

    0Thank You

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    • Posted by Rishiraj Singh Sikarwar 7 years, 1 month ago

    CBSE > Class 11 > Physics
    • 1 answers

    Hemant Tiwari 7 years, 1 month ago

    Just go for class notes nothing is coming from outside

    0Thank You

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    • Posted by Rachit Patidar 7 years, 1 month ago

    CBSE > Class 11 > Physics
    • 2 answers

    Mr. Ajey ? 7 years, 1 month ago

    Rachit bata party kab dea raha ja??

    1Thank You

    Krittika Kar 7 years, 1 month ago

    Refer Pg 306 ncert book 2

    0Thank You

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