CBSE Class 11 Physics Sample Paper Set 22

1) The density of oxygen is 16 times the density of hydrogen. What is the relation between the speeds of sound in two cases? 

2) IF the momentum of a body is doubled, find % age increase in its kinetic energy ? 

3) Three stars p, Q, R appear as green, red and blue respectively. Which star has minimum temperature? 

4) If the polar ice caps melt and spread uniformly, how will the length of the day be affected? 

5) Find the resultant of the following forces acting at a point 200 √2 N along NE, 500 √2 N along NW and 800 N along south. 

6) Derive an equation for the distance covered by a uniformly accelerated body in nth second of its motion. 

7) State the any four important postulates of the kinetic theory of gases. 

8) It is impossible to construct to a heat engine of 100% efficiency? Why 

9) Torque of equal magnitudes are applied to a hollow cylinder , and a solid sphere, both having the same mass and radius. The cylinder is free to rotate about its standard axis of symmetry and the sphere is free to rotate about an axis passing through its centre. Which of the two will acquire a greater angular speed after a given time? 

10) The temperature of a black body is increased from 100 K to 200 K .How will the rate of emission of energy change? 

11) Discus the variation of acceleration due to gravity with altitude. How does the expression modify when h<<R? 

12) If x= a+bt+ct2, where x is in meters and t in seconds ,find the unit of b and c? 

Please refer to attached file for CBSE Class 11 Physics Sample Paper Set V