2. Investigating Effect of Computer Simulations in Physics Teaching at Undergraduate Level Author Popat S. Tambade Co-author Dr. B. G. Wagh Submitted to E-Learn 2008 – World Conference on E-learning in Corporate, Government, Healthcare and Higher Education Prof. Ramkrishna More College, Akurdi, Pune, INDIA K. A. A. N. M. Sonawane College, Satana, Nashik, INDIA [email_address]

10. Flow chart of design of study Traditional lectures Pretest Control Group Experimental Group Special sessions using computer simulations and Group discussions Posttest Revision by traditional method Data analysis

12. Survey Results Oscillations 1 2 3 4 5 6 7 8 910 11 12 13 14 15

18. Thank You AACE and Participants

20. Pretest…. R Oscillations 0.83 Reliability index 0.31 Avg. discrimination index 0.56 Avg. difficulty index Diagnostic Test Index

22. Q1. See the following potential energy curve of simple harmonic oscillator. Out of four points shown on the curve at which point the force acting on the particle is more. (a) A (b) B (c) C (d) D Reason : return

24. Q4. We have four oscillators O 1 , O 2 , O 3 and O 4 having masses 10 gm, 15 gm, 20 gm and 25 gm respectively. Suppose they are oscillating along the same path each with amplitude 5 cm as shown in Fig. Which oscillator will take more time to move from position x = 4cm to x = 3cm. (a) O 1 (b) O 2 (c) O 3 (d) O 4 Reason : Q5. See question (4) which oscillator will make more oscillations in one second? (a) O 1 (b) O 2 (c) O 3 (d) O 4 Reason : Q6. Two oscillators O 1 and O 2 with masses 10 gm and 20 gm respectively are oscillating with the same amplitudes 5 cm and along the same path. Both have the same force constant. Let v 1 and v 2 be the velocities of O 1 and O 2 respectively at x = 4 cm from equilibrium position. Then (a) v 1 = v 2 (b) v 1 < v 2 (c) v 1 > v 2 (d) nothing can be said Reason : return

25. Q7 : An oscillator of mass 10 gm is oscillating along the straight line with period 2 sec with amplitude 5 cm. Let t 1 be the time taken by the oscillator to go from position 4 cm to 3 cm and t 2 be the time taken by the oscillator to go from position 2 cm to 1 cm. Then which one of the following is correct. (a) t 1 = t 2 (b) t 1 > t 2 (c) t 1 < t 2 (d) Nothing can be said. Reason : Q8 : See the following potential energy curve of an-harmonic oscillator. Out of four points shown on the curve at which point the force acting on the particle is less. (a) A (b) B (c) C (d) D Reason : return

26. Q9. See following potential energy curves. When particles are moving in these potential, in which potential the particle will perform simple harmonic motion. Reason : Q10. See the potential energy curves in Q.9. In which potential the force acting on the particle will always be constant. (a) a (b) b (c) c (d) d Reason : return

27. Q11. See the Fig. below. The spring constants (force constants) k 1 > k 2 . Both the masses are oscillating with the same amplitude on a frictionless surface. Which mass will have maximum velocity at equilibrium position. (a) (b) Mass in (2) (c) Both will have the same velocity. (d) None of the above Reason : Mass in (1) 12. We have spring of spring constant k, length L and mass m. The spring is cut into two equal parts such that each part has spring constant k 1 , length L/2 and mass m/2. Then (a) k 1 = k (b) k 1 < k (c) k 1 > k (d) nothing can be said. Reason : return

28. Q13. Which one of the following does not depend on the amplitude of oscillations in SHM (a) velocity (b) frequency (c) energy (d) potential energy Reason : Q14. Which one of the following is independent of displacement from mean position in SHM? (a) velocity (b) energy (c) kinetic energy (d) force. Reason : Q15. If the frequency of oscillator is υ , what will be the frequency of kinetic energy? (a) υ (b) 2 υ (c) 3 υ (d) 4 υ return