Ncert Solutions for Class 11 Chapter 14
CBSE NCERT Solutions For Class 11 Physics Chapter 14:Chapter 14 of CBSE Class 11 Physics deals with oscillatory and periodic motions. It is a very important chapter from the exam point of view and has lots of problems. To help you, we are providing with the NCERT Solutions for Class 11 Physics Chapter 14. The solutions provided here are 100% correct and are solved by experienced faculty at Embibe. These solutions are prepared in a way so that students can gain knowledge as well as score better in their exams.
This NCERT Class 11 Physics Chapter 14 covers oscillatory motion & its applications. In musical instruments like the sitar, the guitar or the violin, we come across vibrating strings that produce pleasing sounds. Along with the theory, going through the Solutions for NCERT Class 11 Physics Chapter 14 questions will help you in clearing your queries related to this chapter. In this article, you will be able to download the PDF of the solutions.
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NCERT Solutions For Class 11 Physics Chapter 14: Oscillations
There are 10 topics in the chapter covering both theory and the applications of oscillations in our daily life:
| 14.1 | Introduction |
| 14.2 | Periodic and Oscillatory Motions |
| 14.3 | Simple Harmonic Motion |
| 14.4 | Simple Harmonic Motion and Uniform Circular Motion |
| 14.5 | Velocity and Acceleration in Simple Harmonic Motion |
| 14.6 | Force Law for Simple Harmonic Motion |
| 14.7 | Energy in Simple Harmonic Motion |
| 14.8 | Some Systems Executing SHM |
| 14.9 | Damped Simple Harmonic Motion |
| 14.10 | Forced Oscillations and Resonance |
CBSE Class 11 Physics Chapter 14 – Oscillations: Chapter Summary & Solutions
Class 11 Physics Chapter 14 Oscillations further informs you that in 1610, Galileo discovered four principal moons of the planet Jupiter. To him, each moon seemed to move back and forth relative to the planet in a simple harmonic motion; the disc of the planet forming the midpoint of the motion. The record of his observations, written in his own hand, is still available.
Through this CBSE NCERT Class 11 Physics Chapter 14, you will also know that Galileo measured the periods of a swinging chandelier in a church by his pulse beats. He observed that the motion of the chandelier was periodic. The system is a kind of pendulum. A person swinging in a swing without anyone pushing it or a simple pendulum, displaced and released, are examples of free oscillations. In both cases, the amplitude of swing will gradually decrease and the system would, ultimately, come to a halt. Because of the ever-present dissipative forces, the free oscillations cannot be sustained in practice. The NCERT Class 11 Physics Chapter 14 PDF is given below.
The phenomenon by which amplitude increases when the driving force is close to the natural frequency of the oscillator is called resonance. In our daily life, we encounter phenomena that involve resonance.
Your experience with swings is a good example of resonance. You might have realized that the skill in swinging to greater heights lies in the synchronization of the rhythm of pushing against the ground with the natural frequency of the swing. The mechanical energy in a real oscillating system decreases during oscillations because external forces, such as drag, inhibit the oscillations and transfer mechanical energy to thermal energy. The real oscillator and its motion are then said to be damped.
CBSE NCERT Class 11 Physics Chapter 14 Oscillations further teaches that a combination of two simple harmonic motions with arbitrary amplitudes and phases is not necessarily periodic. It is periodic only if the frequency of one motion is an integral multiple of the other's frequency. However, a periodic motion can always be expressed as a sum of an infinite number of harmonic motions with appropriate amplitudes.
Some important Multiple Choice Questions on Oscillations
Below are some MCQs from Class 11 Physics Chapter 14:
Q: If the displacement of a particle is represented by the equation y = sin 3 ωt. Then 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.
Q: Below is the relation between acceleration and displacement of four particles. Which one of the particles is executing simple harmonic motion?
- (a) ax = + 2x.
- (b) ax = + 2x2.
- (c) ax = – 2x2.
- (d) ax = – 2x.
Q: What is the motion of an oscillating liquid column in a U-tube?
- (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.
How To Use Class 11 chapter 4 Oscillations Solutions
Once you have downloaded these solutions, you can use them smartly to learn and score better:
- Study the topics and look at the solutions in case you are unable to solve a question.
- Use these as a reference guide while revising.
This article on CBSE NCERT Solutions for Class 11 Physics Chapter 14 Oscillations will help you in clearing doubts. You should also solve the CBSE Class 11 Physics Chapter 14 Oscillations practice questions available online at Embibe and take your preparation to the next level.
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Ncert Solutions for Class 11 Chapter 14
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