NCERT Solutions for Class 11 Physics Chapter 14 - OscillationsShare
NCERT Solutions for Class 11 Physics Chapter 14 – Oscillation have been made available here which prove to be one of the most useful resources Class 11 Physics exam preparation. These NCERT Solutions have been crafted by highly experienced teachers of Goprep keeping in mind the understanding level of the students. So, students facing difficulty in grasping difficult topics in the Chapter can refer to these Solutions to clear their doubts and develop their question-solving skills.
Our NCERT Solutions include easy to learn answers of difficult questions given at the end of the Chapter. Further, we have tried to explain each topic of the Chapter in the simplest of manner using illustrations and diagrams. So, by referring to these NCERT Solutions, you can familiarize yourself with different types of questions that can be asked in the Physics exam.
Here are the topics discussed in NCERT Solutions for Physics Class 11 Chapter - Oscillations
- Introduction to the term oscillations
- Periodic and oscillatory motions
- Simple harmonic motion
- Simple harmonic motion and uniform circular motion
- Velocity and acceleration in simple harmonic motion
- Force law for simple harmonic motion
- Energy in simple harmonic motion
- Some systems executing SHM
- Damped simple harmonic motion
- Forced oscillations and resonance
NCERT Solutions for Class 11 Physics Chapter 14 - Oscillations
Which of the following examples represent periodic motion?
(a) A swimmer completing one (return) trip from one bank of a river to the other and back.
(b) A freely suspended bar magnet displaced from its N-S direction and released.
(c) A hydrogen molecule rotating about its centre of mass.
(d) An arrow released from a bow.
Which of the following examples represent (nearly) simple harmonic motion and which represent periodic but not simple harmonic motion?
(a) the rotation of earth about its axis.
(b) motion of an oscillating mercury column in a U-tube.
(c) motion of a ball bearing inside a smooth curved bowl, when released from a point slightly above the lower most point.
(d) general vibrations of a polyatomic molecule about its equilibrium position.
Which of the following functions of time represent (a) simple harmonic, (b) periodic but not simple harmonic, and (c) non-periodic motion? Give period for each case of periodic motion (ω is any positive constant):
(a) sin ωt – cos ωt
(b) sin3 ωt
(c) 3 cos (π/4 – 2ωt)
(d) cos ωt + cos 3ωt + cos 5ωt
(e) exp (–ω2t2)
(f) 1 + ωt + ω2t2
A particle is in linear simple harmonic motion between two points, A and B, 10 cm apart. Take the direction from A to B as the positive direction and give the signs of velocity, acceleration and force on the particle when it is
(a) at the end A,
(b) at the end B,
(c) at the mid-point of AB going towards A,
(d) at 2 cm away from B going towards A,
(e) at 3 cm away from A going towards B, and
(f) at 4 cm away from B going towards A.
The motion of a particle executing simple harmonic motion is described by the displacement function,
If the initial (t = 0) position of the particle is 1 cm and its initial velocity is ω cm/s, what are its amplitude and initial phase angle? The angular frequency of the particle is π s–1. If instead of the cosine function, we choose the sine function to describe the SHM x = B sin (ωt + α), what are the amplitude and initial phase of the particle with the above initial conditions.
A spring having with a spring constant 1200 N m–1 is mounted on a horizontal table as shown in Fig. 14.24. A mass of 3 kg is attached to the free end of the spring. The mass is then pulled sideways to a distance of 2.0 cm and released.
Determine (i) the frequency of oscillations, (ii) maximum acceleration of the mass, and (iii) the maximum speed of the mass.
In Exercise 14.9, let us take the position of mass when the spring is unstreched as x = 0, and the direction from left to right as the positive direction of x-axis. Give x as a function of time t for the oscillating mass if at the moment we start the stopwatch (t = 0), the mass is
(a) at the mean position,
(b) at the maximum stretched position, and
(c) at the maximum compressed position.
In what way do these functions for SHM differ from each other, in frequency, in amplitude or the initial phase?
|Chapter 9 - Mechanical Properties of Solids|
|Chapter 10 - Mechanical Properties of Fluids|
|Chapter 11 - Thermal Properties of Matter|
|Chapter 12 - Thermodynamics|
|Chapter 13 - Kinetic Theory|
|Chapter 14 - Oscillations|
|Chapter 15 - Waves|