Class 12 Physics Question Paper 2080 | Global School of Science

Sudip Chaudhary
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Class 12 Physics Question Paper 2080

Hi, class 12 students. The following class 12 physics question paper we have provided below are from Global School of Science. Sources: KMC Note 
Class 12 Physics Question Paper

Class 12 Physics Model Question Paper

Class 12 Physics Model Question Paper

Class 12 Physics Model Question Paper

Class 12 Physics Model Question Paper

Class 12 Physics Model Question Paper

Class 12 Physics Model Question Paper

Class 12 Physics Model Question Paper


Group - B

Class 12 Important Physics Question Paper 2080

Give short answers to the following questions.

[8 x 5 = 40]

12. a) Define the coefficient of viscosity. Discuss the effect of temperature on the viscosity of liquid and gas. [1+1]

b) Eight spherical raindrops of equal size are falling vertically through the air with a terminal velocity of 0.15 m/s. What would be the terminal velocity if these two drops were to coalesce to form a larger spherical drop? [2]

c) Roofs of the huts are blown up during storm NWhy?

[1]

OR

[1]

a) What is the "surface energy density" of liquid.

b) Establish the relation between surface tension and surface energy density of a liquid. [2]

c) Calculate the height to which water will rise in a capillary tube of 1.5 mm diameter assuming zero angle of contact. The surface tension of water is 7.4 x 10-3Nm-1. 

13. a) Derive an expression for the total mechanical energy of a particle executing simple harmonic motion.

[2] b) Show graphically, how the kinetic energy, potential energy and total energy of the particle vary with displacement from its equilibrium position. [1] c) A body of mass 2kg is suspended from a spring of negligible mass and is found to stretch the spring 0.1m. What is its force constant and the time- period? [2]

14. a) Obtain an expression for the magnetic field at a point due to a current carrying a long straight conductor using Biot-Savart law. [3]

b) A copper wire has 10 29 free electrons per cubic meter, a cross-sectional area of 2 mm2 and carries a current of 5A. Calculate the force acting on each electron if the wire is now placed in a magnetic field of flux density 0.15 T which is perpendicular to the wire. [2]

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