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Title: PHS 205, Vibrations & Waves
Institution: University of Lagos, Nigeria

Level:
Degree.

Description:
Simple and damped Simple Harmonic motion: Simple harmonic motion of mechanical and electrical oscillators, vector representation of shim, addition of such vectors with fixed and random phase, use of exponential series and complex number notation. Damped notion of mechanical and electrical oscillators, heavy damping, critical damping Logarithmic decrement, Q-value, rate of energy loss.

The Forced Oscillator: Electrical and mechanical impedance. Transient and steady state behaviour of a forced oscillator. Variation of displacement and velocity with driving force frequency. Variation of phase angle with frequency between force and (a) displacement and (b) velocity. Power supplied to oscillator. Q value as measure of bandwidth.

Transverse wave motion: Partial differentiation - particle and phase velocities. The wave equation, transverse waves on a string, characteristic impedance, Reflexion and transmission of transverse waves on a boundary - impedance matching. Standing waves on a string of fixed length-eigenfrequencies, energy in single mode of vibration. Wave groups, group velocity, dispersion.

Longitudinal Waves: Wave equation - sound waves in gases - energy distribution in sound waves, acoustic impedance. Waves in a solid - transmission and reflection at a boundary.

Assessment is by assignments and examination.

Programmes for which this course is required or in which it can be included:
Bachelor of Science Honours in Education/Physics.


Languages:
English

Media and methods employed: Printed text, tV broadcast, radio broadcasts, face-to-face tutorials.
Printed correspondence texts prepared by institution, face-to-face tuition, radio, television via cable.

Administrative information:
This course is equivalent to 2 hours of instruction per week. It is a 1 semester course (15 weeks) and awards 2 units.


Classification:
070430 PHYSICS

Date: 01 September 1992 bb
Source: COSIT Brochure

© 1999 International Centre for Distance Learning, The Open University

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