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GOVT. SEN. SEC. SCHOOL SANDAUR (MALERKOTLA), , TERM II (2022), CLASS : 11th (Physics), Time : 2hrs., , Each question carries 1 mark., 1., 2., 3., 4., 5., 6., 7., 8., 9., 10., 11., 12., 13., , M.M. 35, , (13 X 1=13), , Define orbital velocity., State Kepler's 3rd law., What is geo-stationary satellite?, What is the S.I. unit and dimensional formula of modulus of rigidity?, Define viscosity., Define longitudinal wave., Write the SI unit of molar specific heat capacity., Define thermal conductivity., Define isothermal process., What is heat engine?, What are free oscillations., Write an expression for total energy of gas.., Write the expression for most probable speed., OR, Calculate the number of degrees of freedom for a triatomic gas molecule., , Each question carries 2 marks., , (4 X 2= 8), , 14., 15., 16., 17., , Define Young's modulus and Bulk modulus, Write any two limitations of first law of thermodynamics., Calculate specific heat capacities of mono atomic gases., Derive an expression for the apparent frequency of sound in the case, when the source of the, sound is in motion and listener is at rest., Each question carries 3 marks., (3 X 3 = 9), 18. Show that value of 'g' decreases with the depth from the surface of the earth., OR, Show that the moon would escape if its speed were increased by 42%., 19. Derive an expression for work done during adiabatic process., OR, A Carnot engine whose sink is at 290K has an efficiency of 30%. By how much the temperature of, the source be increased to have its efficiency equal to 50%,keeping sink temperature constant?, 20. Derive differential equation for SHM., OR, Derive an expression for the total energy of a particle executing S.H.M., , Each question carries 5 marks., 21. State and prove Bernoulli’s theorem., OR, Derive an expression for excess of pressure in a liquid drop and liquid bubble., , ( 1 X 5 = 5)