PART TEST 10 FOR NEET 2021

1. What is the time taken by a particle executing SHM with a time period T sec from a positive extreme position to half of the amplitude?

2. On which of the following does the energy of a simple harmonic motion depend

3. Calculate the amplitude for a SHM using the equation x = 3sin2pt + 4cos3pt

4. The equation of the progressive wave is y= asin2π (nt−5/x​). The ratio of maximum particle velocity to wave velocity is

5. What is the phase difference between the prongs of the tuning fork

6. What is the change in the phase if a wave is reflected from a denser medium

7. The phase difference between the instantaneous velocity and acceleration of a particle executing simple harmonic motion is:

8. The length of the pendulum which is displaying SHM is increased by 21%. Calculate the percentage increase in the periodic time of the pendulum.

9. The motion of a particle varies with time according to the relation y =a sin ωt+a cos ωt Then

10. A body mass m is attached to the lower end of a spring whose upper end is fixed. The spring has negligible mass. When the mass m is slightly pulled down and released, it oscillates with a time period of 3s. When the mass m is increased by 1 kg, the time period of oscillations becomes 5s. The value of m in kg is-

11. When two displacements represented by y1=asin(ωt) and y2=bcos(ωt) are superimposed, the motion is –

12. A particle is executing a simple harmonic motion. Its maximum acceleration is α and maximum velocity is β. Then, its time period of vibration will be

13. Which one of the following equations of motion represents simple harmonic motion?
(where k, k0, k1 and α are all positive.)

14. Two simple harmonic motions of angular frequency 100 and 1000 rad s−1 have the same displacement amplitude. The ratio of their maximum acceleration is –

15. In a sinusoidal wave, the time required for a particular point to move from maximum displacement to zero displacement is 0.170.The frequency of the wave will be

16. A resonance air column of length 40 cm resonates with tuning fork of frequency 450Hz. Ignoring end corrections, the velocity of sound in air will be

17. Two equal -ve charges -q are fixed at the point (O, a) and (O, a) on the y-axis. A positive charge Q is released from rest at the point (2a, 0) on the x-axis. The charge will:

18. A particle executing simple harmonic motion of amplitude 5 cm has maximum speed of 31.4 cm/s. The frequency of its oscillation is

19. A pan with a set of weights is attached to a light spring. The period of vertical oscillation is 0.5s. When some additional weights are put in pan, then the period of oscillations increases by 0.1 s. The extension caused by the additional weight is

20. Assertion:  A particle in x-y plane is related by   x = a sin t and y = a (l – cos t), where a and ω are constants, then the particle will have parabolic motion.

Reason:  A particle under the influence of two perpendicular velocities has parabolic motion.

21. A body of mass 60 kg is suspended by means of three strings P Q and R as shown in the figure is in equilibrium. The tension in the string P is

22. The frequency of oscillations of a mass m connected horizontally by a spring of spring constant k is 4 Hz. When the spring is replaced by two identical springs as shown in figure. Then the effective frequency is

23. The time period of a particle undergoing SHM is 16 s. It starts motion from the mean position. After 2 s, its velocity is 0.4 m s-1 .The amplitude is

24. In simple harmonic motion, loss of kinetic energy is proportional to

25. A simple pendulum of length l has a maximum angular displacement θ. The maximum kinetic energy of the bob is

26. A magnet is made to oscillate with a particular frequency, passing through a coil as shown in figure. The time variation of the magnitude of e.m.f. generated across the coil during one cycle is

27. The potential energy of a long spring when stretched by 2 cm is U. If the spring is stretched by 8cm the potential energy stored in it is

28. A boat at anchor is rocked by waves whose crests are 100 m apart and velocity is 25 m/sec. The boat bounces up once in every

29. A body executes simple harmonic motion. The potential energy (PE), kinetic energy (KE) and total energy (TE) are measured as a function of displacement y. Which of the following statements is true?

30. A mass of 2.0 Kg is put on a flat pan attached to a vertical spring fixed on the ground as shown in the figure. The mass of the spring and the pan is negligible. When pressed slightly and released the mass executes a simple harmonic motion. The spring constant is 200 N/m. What should be the minimum amplitude of the motion, so that the mass gets detached from the pan? (take g = 10 m/s^2)

31. Tympanum has all the following except

32.All of the following are functions of labyrinth except

33. which of following part of pituitary is store house of ADH

34 .Testosterone has all action except

35. which of the following is not 2 nd class messenger

36. If you move to dessert, your ADH level will go –

37. Which organ doesn’t show role in vit-D synthesis

38. Feedback inhibition is executed by

39. ‘X’ is hormone which stimulates to secrete enzymatic part of pancreatic juice and ‘Y’ helps to
secrete non-enzymatic part of the same. Identify ‘X’ and ‘Y

40. Which hormones are known as stress hormone and emergency hormone respectively

41. All of the following hormone increases peristalsis except

42. Myelin sheath is produced by

43. Which of the following is excitatory neurotransmitter

44. Nissl’s body is mainly composed of

45. which of the following statements is correct?

46. Color blindness and night blindness are defect due to following respectively

47. Destruction of the anterior horn cells of the spinal cord would result in loss of

48. The nerve center which control the body temperature and the urge for eating are contained in

49.The most abundant intracellular cation is

50. When a neuron is in resting state i.e., not conducting any impulse, the axonal membrane is

51. Genetic engineering is possible, because –

52.The introduction of t-DNA into plants involves –

53. For transformation, micro-particles coated with DNA to be bombarded with gene gun are
made up of

24. 5. Which body of the Government of India regulates GM research and safety of introducing
GM organisms for public services?

55. The genetic defect – adenosine deaminase (ADA) deficiency may be cured permanently by –

56. Assertion and Reasoning type Q. Read the question carefully and answer.

A: Restrictions endonuclease restricts growth of phage virus
R:RE has role in methylation of DNA

57. Odd about ECo R I

58.Find odd one

59. which of following is false

60.Gene therapy corresponds all except

61.

62. Which of the following is the correct increasing order of boiling point of following compounds?

1) CH3 – CH2 – CH2 – OH

ll)

lll) CH3 – O – CH2 CH3