Objective Type Questions & Answers On Class 11 Physics Chapter 14 Oscillations

(1) A particle is in linear simple harmonic motion between two points A and B, 10 cm apart. Taken the direction from A to B as the +ve direction and choose the correct statements.

[A] the sign of velocity, acceleration, and force on the particle when it is 3 cm away from A going towards B are positive

[B] the sign of velocity of the particle at C going towards O is negative

[C] the sign of velocity, acceleration, and force on the particle when it is 4 cm away from B going towards A are negative

[D] the sign of acceleration and force on the particle when it is at point B is negative

Answer: A, C, D

(2) A body is performing SHM. Then its

[A] average total energy per cycle is equal to its maximum kinetic energy

[B] average kinetic energy per cycle is equal to half of its maximum kinetic energy

[C] mean velocity over a complete cycle is equal to 2/π times of its maximum velocity

[D] root mean square velocity is 1/√2 times of its maximum velocity

Answer: A, B, D

(3) The displacement time graph of a particle executing SHM is shown in the figure. Which of the following statement is/are true?

[A] the force is zero at t = 3T/4

[B] the acceleration is maximum at t = 4T/4

[C] the velocity is maximum at t = T/4

[D] the PE is equal to KE of oscillation t = T/2

Answer: A, B, C

(4) Which of the following statements is/are true for a simple harmonic oscillator?

[A] force acting is directly proportional to the displacement from the mean position and opposite to it

[B] motion is periodic

[C] acceleration of the oscillator is constant

[D] the velocity is periodic

Answer: A, B, D

(5) Displacement versus time curve for a particle executing SHM is shown in the figure. Choose the correct statements.

[A] phase of the oscillator is same at t = 0 s and t = 2 s

[B] phase of the oscillator is the same at t = 2 s and t = 6 s

[C] phase of the oscillator is the same at t = 1 s and t = 7 s

[D] phase of the oscillator is the same at t = 1 s and t = 5 s

Answer: B, D

(6) The motion of a ball bearing inside a smooth curved bowl, when released from a point slightly above the lower point is

[A] simple harmonic motion

[B] non-periodic motion

[C] periodic motion

[D] periodic but not SHM

Answer: A, B

(7) The rotation of the earth about its axis is

[A] periodic motion

[B] simple harmonic motion

[C] periodic but not simple harmonic motion

[D] non-periodic motion

Answer: A, C

(8) A particle executing SHM has a maximum speed of 30 cm/s and a maximum acceleration of 60 cm/s². The period of oscillation is

[A] πs

[B] π/2 s

[C] 2 πs

[D] π/t s

Answer: πs

(9) The equation of motion of a particle is x = a cos (αt)2. The motion is

[A] periodic but not oscillatory

[B] periodic and oscillatory

[C] oscillatory but not periodic

[D] neither periodic nor oscillatory

Answer: oscillatory but not periodic

(10) Figure shows the circular motion of a particle. The radius of the circle, the period, sense of revolution, and the initial position are indicated on the figure. The simple harmonic motion of the x-projection of the radius vector of the rotating particle P is

[A] x(t) = B sin (2πt/30)

[B] x(t) = B cos (πt/15)

[C] x(t) = B sin (πt/15 + π/2)

[D] x(t) = B cos (πt/15 + π/2)

Answer: x(t) = B sin (2πt/30)

(11) Four pendulums A, B, C, and D are suspended from the same elastic support as shown in the figure. A and C are of the same length, while B is smaller than A and D is larger than A. If A is given a transverse displacement,

[A] D will vibrate with maximum amplitude

[B] C will vibrate with maximum amplitude

[C] B will vibrate with maximum amplitude

[D] all the four will oscillate with equal amplitude

Answer: C will vibrate with maximum amplitude

(12) The displacement of a particle varies with time according to the relation y = a sin ωt + b cos ωt

[A] the motion is oscillatory but not SHM

[B] the motion is SHM with amplitude a + b

[C] the motion is SHM with amplitude a² + b²

[D] the motion is SHM with amplitude √a² + b²

Answer: the motion is SHM with amplitude √a² + b²

(13) A particle is acted simultaneously by mutually perpendicular simple harmonic motions x = a cos ωt and y = a sin ωt. The trajectory of motion of the particle will be

[A] an ellipse

[B] a parabola

[C] a circle

[D] a straight line

Answer: a circle

(14) Motion of an oscillating liquid column in a U-tube is

[A] periodic but not simple harmonic

[B] non-periodic

[C] simple harmonic and time period is independent of the density of the liquid

[D] simple harmonic and time period is directly proportional to the density of the liquid

Answer: simple harmonic and time period is independent of the density of the liquid

(15) The relation between acceleration and displacement of four particles are given below:

[A] a_x = +2x

[B] a_x = +2x²

[C] a_x = -2x²

[D] a_x = -2x

Answer: a_x = -2x

(16) The displacement of a particle is represented by the equation y = sin³ ωt. The motion is

[A] non-periodic

[B] periodic but not simple harmonic

[C] simple harmonic with period 2π/ω

[D] simple harmonic with period π/ω

Answer: simple harmonic with period 2π/ω

(17) The displacement of a particle is represented by the equation y = 3 cos(π/4 – 2ωt). The motion of the particle is

[A] simple harmonic with period 2p/w

[B] simple harmonic with period π/ω

[C] periodic but not simple harmonic

[D] non-periodic

Answer: simple harmonic with period π/ω

(18) Which of the following does not exhibit polarization

[A] Longitudinal wave in a gas

[B] Transverse wave in a gas

[C] Neither (a) nor (b)

[D] Both (a) and (b)

Answer: Longitudinal wave in a gas

(19) he length of the pendulum which is displaying SHM is increased by 21%. Calculate the percentage increase in the periodic time of the pendulum.

[A] 21%

[B] 10%

[C] 11%

[D] 42%

Answer: 10%

(20) The observer hears a sound from the source which is moving away from the observer who is stationary. Determine the frequency of the sound

[A] It is halved

[B] It remains the same

[C] It reaches infinity

[D] It gets doubled

Answer: It is halved

Missiles Mock Test	Start Test!
SSC MTS Mock Test	Start Test
IBPS CLERK MOCK TEST	Start Test
SSC MTS 2022 JULY 26 Shift 1 (ENGLISH)	Start Test!
SSC GD Previous Year Paper 2021 Nov 17 Shift - I (Hindi)	Start Test!
SSC CGL Tier - 1 PYP 2022 April 21 Shift- 1 (ENGLISH)	Start Test!
MPSC PAPER I MOCK TEST 1 (ENGLISH)	Start Test!
IB Security Assistant Mock test 1 (english)	Start Test!
UP POLICE CONSTABLE MOCK TEST 1	Start Test!
DELHI POLICE CONSTABLE MOCK TEST 1 (HINDI)	Start Test!

NCERT Solutions for class 11 Physics | Chapter 14 - Oscillations

By Gkseries see more questions

DOWNLOAD CURRENT AFFAIRS PDF FROM APP

Take Mock Tests

Chapters

Latest Test Series

SSC CGL

DELHI POLICE SI

WEST BENGAL PSC

CISF CONSTABLE

JAIIB

ADRE 2024

RRB RRC GROUP D

UP POLICE SI

NCERT Solutions for class 11 Physics | Chapter 14 - Oscillations

By Gkseries see more questions

Download PDF

Take Mock Tests

Chapters

Latest Test Series