FY 24 Physics Exam Paper December 2023 PDF

# FY 24 ## FIRST YEAR HIGHER SECONDARY SECOND TERMINAL EXAMINATION, DECEMBER 2023 ### Part - III ### PHYSICS Maximum: 60 Scores Time: 2 Hours Cool-off Time: 15 Minutes ## General Instructions to Candidates : * There is a 'Cool off time' of 15 minutes in addition to the writing time. * Use 'cool o...

# FY 24 ## FIRST YEAR HIGHER SECONDARY SECOND TERMINAL EXAMINATION, DECEMBER 2023 ### Part - III ### PHYSICS Maximum: 60 Scores Time: 2 Hours Cool-off Time: 15 Minutes ## General Instructions to Candidates : * There is a 'Cool off time' of 15 minutes in addition to the writing time. * Use 'cool off time' to get familiar with questions and to plan your answers. * Read questions carefully before answering. * Calculations, figures and graphs should be shown in the answer sheet itself. * Malayalam version of the questions is also provided. * Give equations wherever necessary. * Electronic devices except non programmable calculators are not allowed in the Examination Hall. ## Answer any 5 questions from 1 to 7. Each carries one score. (5x1=5) 1. The number of significant figures in 12,300 cm is: a) 5 b) 4 c) 3 d) 2 2. “For a straight line motion distance and displacement are equal." The statement is: True/False. 3. For equilibrium of a body the net force is: a) Zero b) Half the applied force c) Applied force d) Twice the applied force 4. Dimension of Power is: a) MLT⁻¹ b) MLT⁻² c) ML⁻¹T⁻² d) ML²T⁻³ 5. A rolling body has: a) Only translational motion b) Only rotational motion c) Both translational and rotational motion d) Precessional motion 6. The excess pressure inside a drop of liquid is: a) Zero b) 2S/r c) 3S/r d) 4S/r 7. During the phase change of a substance, its temperature is _______. ## Answer any 5 questions from 8 to 14. Each carries 2 scores. (5x2=10) 8. Define acceleration, give its unit and dimension. 9. State triangle law of vector addition. 10. What is momentum, is it a vector or scalar quantity? 11. Write the expression for kinetic energy and potential energy and mention each term. 12. Define Newton's law of gravitation. 13. State Hooke's law in elasticity. 14. What is an isothermal process? Give its equation ## Answer any 6 questions from 15 to 21. Each carries 3 scores. (6x3=18) 15. What are the uses of dimensional analysis? Explain. 16. A cricket ball is thrown at a speed of 28 ms⁻¹ in a direction 30° from the horizontal. Calculate the maximum height attained by the ball. 17. Define angular velocity and derive the expression connecting linear velocity and angular velocity. 18. State and explain the law of conservation of angular momentum. 19. Draw the stress-strain diagram of an elastic body and mention important points. 20. State the law behind the picture and find F₂. * A diagram showing a horizontal surface with an object placed on top. The object is connected to a rope where F₁ is acting on the object. Another rope is at an angle of 45 degrees to the horizontal surface connected at the other side of the object where F₂ is acting on the object. * A₁ is the area where F₁ is acting. A₂ is the area where F₂ is acting. The object is sitting on a surface with two horizontal lines on the surface. 21. What is thermal conductivity? Give its unit and dimension. ## Answer any 3 questions from 22 to 25. Each carries 4 scores. (3x4=12) 22. a) State Newton's laws of motion. b) Show that F=ma using the above law. 23. a) How will you calculate work? Explain various kinds of work. b) State and explain work-energy theorem. 24. a) Distinguish between streamline and turbulent flow. b) Explain the equation of continuity. 25. a) State and explain the first law of thermodynamics. b) Identify the graph and name the process AB, BC, CD and DA. * A P-V graph is shown. The graph is a closed curve bounded by four points in counterclockwise order A, B, C and D. ## Answer any 3 questions from 26 to 29. Each carries 5 scores. (3x5=15) 26. a) Draw V-t graph for uniform acceleration. b) Derive the relation s=ut + ½at² from the above graph.. 27. a) What is friction? Explain its different types. b) Obtain the expression for the maximum speed of a car in a circular level road. 28. a) Define acceleration due to gravity. b) Explain the variation of acceleration due to gravity at depth and at height from the surface. 29. a) Bernoulli's principle is an example of _____. b) State Bernoulli's principle. c) State and explain Torricelli's law.