Online Test Series : Instant Score & Rank. The following types of exercises are provided in modules: Board Level Exercise is included in modules because of the reintroduction of Board examination in CBSE. If there is a difference in the frequency of external force and natural frequency of the body, then amplitude of oscillation is very small. •    When a body is maintained in a state of vibration by a strong periodic force, the vibrations are known as forced vibrations. 2130050, COPYRIGHT (C) 2013 RESONANCE | CIN - U80302RJ2007PLC024029, Terms E-mail :dlpd@resonance.ac.in, E-mail : contact@resonance.ac.in Check out the latest Class 10 Social Science Study Material.The SST study materials are for the academic year 2020-21 session. School Exam Preparation (SEP) test in subjective format & Olympiads preparation test based on Objective Pattern. The following types of exercises Exercise 1: Containing questions according to the pattern being asked in school examinations. Online Practice Test Series of Foundation & Olympiads. Contact No. Purchase. Study Material has 3 levels of exercises: Exercise 1: Containing questions according to the pattern being asked in school examinations. Exercise 2: Containing questions in accordance to the level being asked in the competitive examinations & Olympiads. : +91-022-391672228 E-mail :dlpd@resonance.ac.in The vibrations that take place under the influence of external periodic forces are known as forced vibrations. Enter your email to change registered mobile number: *You could select course later from my profile. A body executing forced vibration is under three forces, restoring force, frictional force which opposes vibrating motion and the external periodic force or driving force which supports vibrating motion. Exercise 2: Containing questions in accordance to the level being asked in the National Level Competitive Examinations. Exercise 3: Questions from previous year papers of competitive examination especially NTSE. The rate of energy dissipation depends on nature of surrounding medium, shape of the vibrating body and size of the surrounding body. Overtones or harmonics are higher frequencies which are integral multiple of fundamental frequency. The vibrations produced in the diaphragm of a gramophone sound box are an example of forced vibrations as these frequencies corresponds to the tones conveyed from the record. The entire material of this page is free of study fees. Resonance occurs when an object is made to vibrate at its natural frequency. •    The motion in which the amplitude of vibration remains constant with time is known as undamped vibrations. This course aims to develop strong foundation for school examination and build Competitive Download facility for all Tests. Why sometimes we hear a loud rattling sound from certain parts of a moving vehicle? When a body vibrates with its own natural frequency in absence of external force, it is said to execute natural or free vibrations. Material has theory part with perfect blend of solved examples & important notes. Copyright © 2018 Extramarks. of Service| Privacy Policy| Online Users This course lays strong foundation for School Exams and Olympiads through Study Resonance is defined as the phenomenon of setting a body into vibrations by a strong periodic force whose frequency coincides with the natural frequency of the body. Centre of Gravity and uniform Circular Motion. Online Test Series : Study Material and Notes of Ch 10 Light – Reflection and Refraction Class 10th Science Instant Score & Rank. •    Fundamental frequency is known as first harmonic or subsidiary whereas the frequency twice the fundamental frequency is known as second harmonic or subsidiary and so on. Apply Now. •    Sound is produced due to vibrations. Instant Score & Rank. : +91-022-391672228 with perfect blend of solved examples & important notes. To Access the full content, Please modules & Online Test Series*. Study Material has 3 levels of exercises: Online Test Series : The amplitude and the frequency of free vibration remain constant. : 0744 - 2777756 Fax No. The amplitude of forced vibrations always remains constant. Study Material has 3 levels of exercises: This course aims to develop strong foundation for school examination and build Competitive These vibrations are known as Natural or Free vibrations. Vibrations can be free, forced or damped. The additional force which keeps a body in vibration with constant amplitude is called driving force. The vibration of a bob of a simple pendulum is an example of which type of vibration? Extramarks provides online study material for ICSE class 10 Natural, Forced Vibrations and Resonance chapter.