In this article, you will get JKBOSE Class 11 Physics Important Questions for the upcoming exams. These questions are important from the examination point of view.
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Long Answer Questions
1. What is the principle of homogeneity? With the help of an example, discuss how it can be utilized to:
- check the correctness of a relation representing a physical phenomenon
- convert units from one system to another
- derive a relation between quantities required to describe a physical phenomenon.
2. In terms of the components of two vectors in Cartesian coordinates, derive an expression for their dot product and formulate a formula for determining the angle between the vectors.
3. Define the cross product of two vectors along with its properties, and provide examples. Additionally, derive the formula for obtaining the cross product in terms of the components in Cartesian coordinates.
4. For a projectile launched horizontally from an elevated position, determine the following:
• time it takes to reach ground level
• impact velocity upon reaching the ground,
• horizontal distance covered (range)
• equation describing its trajectory.
5. For a projectile launched at an angle relative to horizontal ground level, determine the following:
- time taken to reach maximum height
- maximum height attained
- total time of flight
- horizontal range
- angle for maximum horizontal range
- value of maximum range
- impact velocity
- equation governing its trajectory.
6. Define centripetal acceleration and derive its expression.
7. What is the centripetal force? Derive an expression for it.
8. Derive an expression for the safe speed of a vehicle a) on a level circular road, and b) on a banked road.
9. Define kinetic energy and explain the relationship between work and kinetic energy, specifically the work-kinetic energy relationship.
10. Derive the expression for the velocities of two colliding bodies after experiencing a one-dimensional (head-on) collision with each other.
11. Distinguish between conservative and non-conservative forces. Give examples of each type of force.
12. State the two theorems of rotational inertia: the parallel axes theorem and the perpendicular axes theorem.
13. Explain the concepts of torque and angular momentum. Present the mathematical expressions for each in polar form and then express them in Cartesian coordinates.
14. Explain the conservation of angular momentum principle and give examples to illustrate it.
15. Discuss the variation of acceleration due to gravity with height and depth above and below the surface of a planet (Earth).
16. Define escape velocity and derive its expression.
17. What is meant by orbital velocity? Derive an expression for the orbital velocity of a satellite.
18. Find the elastic potential energy of a stretched wire and hence determine the elastic potential energy per unit volume of the wire.
19. Describe capillarity and derive the formula for capillary ascent or descent.
20. Explain Stokes’ law. Utilize Dimensional Analysis to derive the relation for the drag force on a sphere moving through a viscous medium.
21. State and prove Bernoulli’s theorem, and provide examples of its common applications.
22. Briefly describe the three modes of heat transfer.
23. Describe thermal conduction in a steady-state condition and subsequently define the terms coefficient of thermal conductivity, thermal resistance, and thermal resistivity arising from it.
24. Describe the following thermodynamic processes and illustrate each one with an indicator diagram.
(a) Isobaric Process
(b) Isochoric Process
(c) Isothermal Process
(d) Adiabatic Process
25. Derive the expressions for the work done by or on an ideal gas during
(a) an isothermal process
(b) an adiabatic process
26. Obtain the expression for the average kinetic energy of an ideal gas and, consequently, define temperature in terms of it.
27. Define and derive the Root Mean Square (RMS) speed of gas molecules.
28. Derive the expression of the following for a particle in SHM:
(a) Displacement
(c) Acceleration
(e) Potential Energy
(b) Velocity
(d) Kinetic Energy
(f) Total Energy
Show graphically how each term varies with time and separately with displacement.
29. Discuss the effect of temperature, pressure and density on the velocity of sound in gases.
30. What are stationary (or standing) waves? Discuss graphical method for formation of standing waves in a stretched string and give some of their characteristics.
Short Answer Questions
(1) what is mechanical energy?
(2) What are the dimensions of energy and power?
(3) What is torque and how is it different from force?
(4) What is centre of mass? What is its importance?
(5) Differentiate between kinetic energy and potnetial energy.
(6) Write any two applications of Bernoulli theorem.
(7) Differentiate between longitudnal waves and transverse waves.
(8) what are the various factors on which time period of a simple pendulum depends?
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