PX12012 Electricity and Magnetism
Introductory description
This module is largely concerned with the great developments in electricity and magnetism, which took place during the nineteenth century. The sources and properties of electric and magnetic fields in free space and in materials are discussed in some detail. We will see that charges are a source of electric fields (Gauss's law) while moving charges are the source of magnetic fields (Ampere's law). Faraday discovered that timedependent magnetic fields also generate electric fields. The module deals with dc and ac circuit theory including the use of complex impedance.
Module aims
To introduce the properties of electrostatic and magnetic fields, and their interaction with dielectrics, conductors and magnetic materials. To introduce some of their practical effects and the behaviour of simple passive circuits and networks.
Outline syllabus
This is an indicative module outline only to give an indication of the sort of topics that may be covered. Actual sessions held may differ.
Introduction: Field forces, history, the concepts of charge and flux, stationary and moving charges.
Essential Mathematics I: Solid angle, integration and vectors, area as a vector, coordinate systems.
Elements: Gauss' Theorem, monopole and dipole sources.
Electrostatics:, electric field of a point charge, principle of superposition, application of Gauss' Theorem to E, Coulomb's law, work and electrical potential, exchange of electrostatic and kinetic energy.
The electric dipole: field and moment, addition of dipole moments, forces on dipoles in electric fields, dielectric materials and polarization.
Capacitance: capacitors, stored energy, capacitors in series, capacitors in parallel.
Magnetostatics: Magnetic field of a current, magnetic dipole and Gauss' Theorem, the BiotSavart Law, Ampere's circuital law, forces on and between conductors, forces on individual moving charges, torque on a current loop/magnetic dipole, the dipole moment.
Electromagnetic Induction: Faraday's law, Lenz's principle, motional e.m.f., flux  cutting law, electric generators, electric motors, selfinductance, mutual inductance, magnetic energy, inductors in series and in parallel.
Magnetic dipoles in materials, magnetization, paramagnetics, diamagnets and ferromagnets, magnetization surface current.
D.C. Circuits: The electric circuit, energy relationships, Kirchoff's laws, Maxwell loop currents, use of symmetry, superposition principle, Thevenin's theorem, Norton's theorem.
Essential Mathematics II: Complex numbers, Euler's representation.
Transient Response: Capacitors, inductors, LCR circuits.
Sinusoidal Currents and EMF's: Capacitors, Inductors, Resistors, the concept of phasors, complex impedance, a.c. power and the power factor, series resonant LCR circuits, quality factor, voltage magnification, parallel resonant LCR circuit, filters, a.c. bridges.
Learning outcomes
By the end of the module, students should be able to:
 Calculate self and mutual inductance, explain the operation of generators and electric motors, and find the energy in simple magnetic fields.
 Compute the electrostatic and magnetic fields for simple distributions of monopoles or dipoles
 Calculate the current and potential distributions in simple DC networks and explain the phenomenon of resistance
 Describe how passive circuit elements (resistors, capacitors and inductors) behave when subject to alternating emf's, and be able to use complex impedances to simplify such problems
 Explain the concepts of charge, field and flux.
 Explain the interaction between electrostatic or magnetic fields and materials
 Explain the phenomena of capacitance and inductance
Indicative reading list
H D Young and R A Freedman, University Physics , Pearson. also W.J.Duffin, Electricity and Magnetism, McGrawHill; R Feynman, Feynman Lectures on Physics vol. II, AddisonWesley.
View reading list on Talis Aspire
Subject specific skills
Knowledge of mathematics and physics. Skills in modelling, reasoning, thinking.
Transferable skills
Analytical, communication, problemsolving, selfstudy
Study time
Type  Required 

Lectures  30 sessions of 1 hour (25%) 
Seminars  (0%) 
Private study  90 hours (75%) 
Total  120 hours 
Private study description
Working through lecture notes, solving problems, wider reading, discussing with others taking the module, revising for exam, practising on past exam papers
Costs
No further costs have been identified for this module.
You do not need to pass all assessment components to pass the module.
Assessment group B1
Weighting  Study time  

3 hour online examination (Summer)  100%  
Answer 4 questions

Feedback on assessment
Meeting with Personal Tutor
Courses
This module is Core for:
 Year 1 of UPXAFG33 Undergraduate Mathematics and Physics (BSc MMathPhys)
 Year 1 of UPXAGF13 Undergraduate Mathematics and Physics (BSc)
 Year 1 of UPXAFG31 Undergraduate Mathematics and Physics (MMathPhys)
 Year 1 of UPXAF304 Undergraduate Physics (BSc MPhys)
 Year 1 of UPXAF300 Undergraduate Physics (BSc)
 Year 1 of UPXAF303 Undergraduate Physics (MPhys)
 Year 1 of UPXAF3N1 Undergraduate Physics and Business Studies
 Year 1 of UPXAF3F5 Undergraduate Physics with Astrophysics (BSc)
 Year 1 of UPXAF3FA Undergraduate Physics with Astrophysics (MPhys)
 Year 1 of UPXAF3N2 Undergraduate Physics with Business Studies
This module is Option list B for:
 Year 1 of UMAAG100 Undergraduate Mathematics (BSc)
 Year 1 of UMAAG103 Undergraduate Mathematics (MMath)
 Year 1 of UMAAG106 Undergraduate Mathematics (MMath) with Study in Europe
 Year 1 of UMAAG1NC Undergraduate Mathematics and Business Studies
 Year 1 of UMAAG1N2 Undergraduate Mathematics and Business Studies (with Intercalated Year)
 Year 1 of UMAAGL11 Undergraduate Mathematics and Economics
 Year 1 of UECAGL12 Undergraduate Mathematics and Economics (with Intercalated Year)
 Year 1 of UMAAGV18 Undergraduate Mathematics and Philosophy with Intercalated Year
 Year 1 of UMAAG101 Undergraduate Mathematics with Intercalated Year