In This Post we are providing Chapter-14 Oscillations NCERT MCQ for Class 11 Physics which will be beneficial for students. These solutions are updated according to 2021-22 syllabus. These MCQS can be really helpful in the preparation of Board exams and will provide you with a brief knowledge of the chapter.
NCERT MCQ ON OSCILLATIONS
Question 1: Select the incorrect statement(s) from the following.
I. A simple harmonic motion is necessarily periodic.
II. A simple harmonic motion may be oscillatory
III. An oscillatory motion is necessarily periodic
- a) II and III
- b) I and II
- c) I only
- d) I and III
Answer: II and III
Question 2: Suppose a tunnel is dug along a diameter of the earth. A particle is dropped from a point, a distance h directly above the tunnel, the motion of the particle is
- a) oscillatory
- b) simple harmonic
- c) parabolic
- d) non-periodic
Answer: oscillatory
Question 3: The graph plotted between the velocity and displacement from mean position of a particle executing SHM is
- a) ellipse
- b) straight line
- c) circle
- d) parabola
Answer: ellipse
Question 4: A body executing linear simple harmonic motion has a velocity of 3 m/s when its displacement is 4 cm and a velocity of 4 m/s when its displacement is 3 cm. What is the amplitude of oscillation ?
- a) 5 cm
- b) 7.5 cm
- c) 10 cm
- d) 12.5 cm
Answer: 5 cm
Question 5:
Assertion : A particle executing simple harmonic motion comes to rest at the extreme positions .
Reason : The resultant force on the particle is zero at these positions
- a) Assertion is correct, reason is incorrect
- b) Assertion is incorrect, reason is correct
- c) Assertion is correct, reason is correct; reason is not a correct explanation for assertion
- d) Assertion is correct, reason is correct; reason is a correct explanation for assertion
Answer: Assertion is correct, reason is incorrect
Question 6: The total energy of a particle executing S.H.M. is proportional to
- a) square of amplitude of motion
- b) velocity in equilibrium position
- c) frequency of oscillation
- d) displacement from equilibrium position
Answer: square of amplitude of motion
Question 7: Which of the following is true about total mechanical energy of SHM ?
- a) It is never zero
- b) It is always zero
- c) It is zero at extreme position
- d) It is zero at mean position.
Answer: It is never zero
Question 8:
Assertion : The graph of total energy of a particle in SHM w.r.t. position is a straight line with zero slope.
Reason : Total energy of particle in SHM remains constant throughout its motion.
- a) Assertion is correct, reason is correct; reason is a correct explanation for assertion
- b) Assertion is correct, reason is correct; reason is not a correct explanation for assertion
- c) Assertion is correct, reason is incorrect
- d) Assertion is incorrect, reason is correct.
Answer: Assertion is correct, reason is correct; reason is a correct explanation for assertion
Question 9: A body executes simple harmonic motion. The potential energy (P.E.), the kinetic energy (K.E.) and total energy (T.E.) are measured as a function of displacement x. Which of the following statement is true?
- a) K.E. is maximum when x = 0.
- b) T.E. is zero when x = 0.
- c) K.E. is maximum when x is maximum
- d) P.E. is maximum when x = 0.
Answer: K.E. is maximum when x = 0.
Question 10: The total energy of the particle executing simple harmonic motion of amplitude A is 100 J. At a distance of 0.707 A from the mean position, its kinetic energy is
- a) 50 J
- b) 100 J
- c) 12.5 J
- d) 25 J
Answer: 50 J
Question 11: When the displacement of a particle executing simple harmonic motion is half of its amplitude, the ratio of its kinetic energy to potential energy is
- a) 3 : 1
- b) 1 : 2
- c) 2 : 1
- d) 1 : 3
Answer: 3 : 1
Question 12: If the maximum velocity and acceleration of a particle executing SHM are equal in magnitude, the time period will be
- a) 6.28 sec
- b) 12.56 sec
- c) 3.14 sec
- d) 1.57 sec
Answer: 6.28 sec
Question 13: A simple pendulum oscillates in air with time period T and amplitude A. As the time passes
- a) T remains same and A decreases
- b) T decreases and A is constant
- c) T increases and A is constant
- d) T and A both decrease
Answer: T remains same and A decreases
Question 14: Which of the following will change the time period as they are taken to moon?
- a) A simple pendulum
- b) A torsional pendulum
- c) A physical pendulum
- d) A spring-mass system
Answer: A simple pendulum
Question 15: For an oscillating simple pendulum, the tension in the string is
- a) maximum at mean position
- b) constant throughout the motion
- c) cannot be predicted
- d) maximum at extreme position
Answer: maximum at mean position
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