# ELECTROMAGNETIC WAVES - 2021/2

Module code: PHY2065

## Module Overview

The module reprises electrostatics (Gauss’ Law) and proceeds to introduce electromagnetic theory through a development of Maxwell’s Equations and concepts associated with the electric and magnetic polarization of materials.

The module introduces electromagnetic wave theory and its applications to a range of traditional applications and problems as well as the use of Fourier processing for wave signal analysis.

### Module provider

Mathematics & Physics

FLORESCU Marian (Physics)

### Module cap (Maximum number of students): N/A

Independent Learning Hours: 90

Tutorial Hours: 11

Guided Learning: 16

Captured Content: 33

Semester 2

None

## Module content

Electromagnetism and applications

Reprise of Gauss’ Law (first Maxwell equation) and capacitors leading to Dielectrics, Insulators & Conductors, Electric Polarisation P, Electric Displacement D, Dielectric permittivity, Electric Susceptibility, Dielectric Screening, Boundary conditions for D and E.

Electric current I and current density j, Charge continuity, Magnetic field B, Biot-Savart Law, Gauss' Law for magnetism (second Maxwell equation), Force between two conductors, The Amp, Lorentz force, Hall effect, Ampere's Law.

Electromagnetic Induction, Faraday’s Law (third Maxwell equation), Mutual and self inductance, Energy storage in B-field, Magnetic torque, Magnetic dipoles..

Diamagnets, Paramagnets, Ferromagnetics, Magnetisation M, Magnetic intensity H, Magnetic permeability, Magnetic susceptibility,

Magnetisation current, Magnetic circuits, Reluctance, Hysteresis, Permanent magnets, Boundary conditions for B and H,

Displacement current, fourth Maxwell equation, review of vector analysis,

Electromagnetic Waves and Applications:

The module investigates further the topics of electromagnetism and electromagnetic waves.

The lectures will go on to combine Maxwell’s equations to investigate electromagnetic wave propagation in vacuum, in materials and the behavior of electromagnetic waves at interfaces:

Electromagnetic Waves, Speed, Refractive index, Attenuation, Skin depth, Uniform Plane waves, Linear Polarisation, Energy density and Power of Waves, Waves at Boundaries - reflection & refraction.

Fresnel's equations, Brewster angle, Total Internal reflection. Transmission Lines

Processing signals images using Fourier analysis and manipulation of Fourier-transformed data.

## Assessment pattern

Assessment type Unit of assessment Weighting
Online Scheduled Summative Class Test ONLINE (OPEN BOOK) BI-WEEKLY QUIZZES WITHIN 24HR WINDOW 30
Examination Online ONLINE (OPEN BOOK) EXAM 70

NA

## Assessment Strategy

The assessment strategy is designed to provide students with the opportunity to demonstrate subject knowledge and ability to apply subject knowledge to unseen problems in electromagnetism, electromagnetic waves and electromagnetic properties of materials.
Thus, the summative assessment for this module consists of:

• a final examination of  2h duration, with two sections: section A contains compulsory questions worth 20 marks and section B contains three questions of 20 marks each of which the students attempt two.

• a mid-semester multiple-choice class test of duration 45 minutes.

Formative assessment

• Problem sets on electromagnetism and electromagnetic waves are provided weekly together with model answers to these questions, which allow the students to test their understanding of course material.

• Formative assessment is also provided through weekly online multiple-choice quizzes for the material taught during the second half of the module.

Feedback

Verbal feedback covering lecture material and problem sets is provided at hour-long weekly tutorial sessions throughout the semester. Model solutions for the questions on the problem sets provide students with feedback on their problem-solving ability. The online multiple-choice quizzes provide model solutions for the questions answered incorrectly.

## Module aims

• The module aims to present a comprehensive coverage of electromagnetism, electromagnetic waves and the electromagnetic properties of materials. It does this through the development of relevant electromagnetism theory in lectures and though the presentation of traditional applications and problems in lectures and tutorial problems. The module aims to provide further practice in the use of the mathematical tools of vector calculus and partial differential equations learnt in PHY2064.

## Learning outcomes

 Attributes Developed 1 Demonstrate knowledge of the fundamental importance of electromagnetism to many other fields of physics 2 Describe the basic concepts and principles of electromagnetic theory; 3 Set up systems of equations to describe standard problems and systems using of electromagnetism and electromagnetic waves; 4 Demonstrate competence in the analytical and numerical solution of these equations for modeling these standard problems 5 Apply the method of Fourier analysis to process electromagnetic waves.

Attributes Developed

C - Cognitive/analytical

K - Subject knowledge

T - Transferable skills

P - Professional/Practical skills

## Methods of Teaching / Learning

33 hours of lectures and 11 hours of class tutorials.

Total student workload is 150 hours, with the remaining hours consisting of independent study

The class test is of 45 minutes duration and comprises an on-line multiple choice question paper of 20 questions.

The final examination is of 2h duration, with 2 questions to be attempted from 3.

Indicated Lecture Hours (which may also include seminars, tutorials, workshops and other contact time) are approximate and may include in-class tests where one or more of these are an assessment on the module. In-class tests are scheduled/organised separately to taught content and will be published on to student personal timetables, where they apply to taken modules, as soon as they are finalised by central administration. This will usually be after the initial publication of the teaching timetable for the relevant semester.

Upon accessing the reading list, please search for the module using the module code: PHY2065

## Programmes this module appears in

Programme Semester Classification Qualifying conditions
Physics with Astronomy BSc (Hons) 2 Compulsory A weighted aggregate mark of 40% is required to pass the module
Physics with Quantum Technologies BSc (Hons) 2 Compulsory A weighted aggregate mark of 40% is required to pass the module
Physics BSc (Hons) 2 Compulsory A weighted aggregate mark of 40% is required to pass the module
Mathematics and Physics BSc (Hons) 2 Compulsory A weighted aggregate mark of 40% is required to pass the module
Mathematics and Physics MPhys 2 Compulsory A weighted aggregate mark of 40% is required to pass the module
Mathematics and Physics MMath 2 Compulsory A weighted aggregate mark of 40% is required to pass the module
Physics with Nuclear Astrophysics MPhys 2 Compulsory A weighted aggregate mark of 40% is required to pass the module
Physics with Astronomy MPhys 2 Compulsory A weighted aggregate mark of 40% is required to pass the module
Physics with Nuclear Astrophysics BSc (Hons) 2 Compulsory A weighted aggregate mark of 40% is required to pass the module
Physics with Quantum Technologies MPhys 2 Compulsory A weighted aggregate mark of 40% is required to pass the module
Physics MPhys 2 Compulsory A weighted aggregate mark of 40% is required to pass the module

Please note that the information detailed within this record is accurate at the time of publishing and may be subject to change. This record contains information for the most up to date version of the programme / module for the 2021/2 academic year.