AC-Circuits & Electro Physics


Prerequisite/Recommended prerequisite for participation in the module

Knowledge of electronics corresponding to analog instrumentation (2nd semester)

Content, progress and pedagogy of the module

To teach students with fundamental knowledge of AC circuits and electro physics. To enable them to do analysis about static, quasistatic and dynamic electrical circuits connecting with combined electrical and magnetic fields.

Learning objectives


  • Have knowledge of static and quasistatic electrical and magnetic fields, capacity and inductance
  • Must be able to understand and analyse circuits containing resistive, capacitive and inductive elements
  • Must be able to understand and analyse stationary AC-circuits using complex symbolic methodology
  • Must be able to understand and use Laplace transformation to analyse of dynamic electrical circuits


  • Must be able to analyse static and quasistatic electrical and magnetic fields and their usage
  • Must be able to apply electro physics to determine electrical resistance, capacitance and inductance
  • Must be able to apply electro physics to calculation of mechanical forces produced by electrical and magnetic fields
  • Must be able to analyse stationary conditions in circuits containing resistive, capacitive and inductive elements
  • Must be able to analyse electrical circuits dynamic conditions
  • Must be able to apply methods for analyse of frequency conditions (amplitude and phase characteristic)
  • Must be able to apply complex symbolic methodology for calculating stationary AC-circuits
  • Must be able to analyse current, voltage, energy and power conditions in AC-circuits
  • Must have skills within Electro physics including
    • Electrical fields, Displacement, electrical field strength, permittivity, Coulombs law, dielectric polarisation, Electrical potential.
    • Energy in electrical fields, Gauss’ law, capacitance for simple geometries, electric flux, capacitors and capacitance
    • Magnetic fields, flux intensity and magnetic field strength, permeability, Biot-Savarts magnetic polarisation, Ampère’s law and magnetic flux
    • Inductance, magnetic forces on conducting conductors, torque on current loops in homogeny magnetic fields and magnetic forces between two parallel conductors, and coils
    • The generalized form of Ampére’s law
    • Faraday’s law, induced electromotive force, the electric generator
    • Lenz’ law
    • Maxwell’s equations
    • Ferromagnetic materials, hysteresis, B-H curves, energy in magnetic fields, vortex losses 
  • Must have skills in elementary circuit theory including
    • Energy storing components (L and C), initial values (L(0) and C(0))
    • First order systems, solving circuit equations of first order, Universal method
    • Second order systems, damping and natural frequency (θ and ω), solving circuit equations of second order (over damped, under damped and critically damped)
    • Transfer functions and usage of Laplace transformation on electrical circuits
    • Frequency analysis and Bodepots (amplitude and phase characteristics)
    • Resonance circuits
    • Poles and zeroes analysis
    • Frequency analysis
    • Filter networks
    • Fourier analysis
  • Must have skills in elementary AC-circuits theory including
    • The complex symbolic methodology for calculating AC-circuits (single phased)
    • Impedance and admittance principle for stationary circuits
    • Power in AC-circuits, immediate power, average power, RMS, active and reactive power, power factor
    • Phasordiagrams for calculating stationary AC-circuits
    • Mutual inductance, coupling factor, single phase transformer


  • Shall be able to handle simple development oriented situations regarding electro physics and circuit technical problems in study- or work situations
  • Shall independently be able to engage in disciplinary and interdisciplinary corporations with a professional approach within elementary electrical and physics theory and methods.
  • Must be able to identify own learning needs and structure own learning within electro physics and dynamical electrical circuits

Type of instruction

The programme is based on a combination of academic, problem-oriented and interdisciplinary approaches and organised based on the following work and evaluation methods that combine skills and reflection:

  • Lectures
  • Classroom instruction
  • Project work
  • Workshops
  • Exercises (individually and in groups)
  • Teacher feedback
  • Reflection
  • Portfolio work

Extent and expected workload

Since it is a 5 ECTS course module, the work load is expected to be 150 hours for the student



Name of examAC-Circuits & Electro Physics
Type of exam
Written or oral exam
Assessment7-point grading scale
Type of gradingInternal examination
Criteria of assessmentAs stated in the Joint Programme Regulations.

Facts about the module

Danish titleAC kredsløbsteori og elektrofysik
Module codeN-ED-B3-2
Module typeCourse
Duration1 semester
Empty-place SchemeYes
Location of the lectureCampus Esbjerg
Responsible for the module


Study BoardStudy Board of Energy
FacultyFaculty of Engineering and Science