In 1831 British physicist Michael Faraday was analysing all the cases of electromagnetic induction phenomena – phenomena of current induction in a conductor along…
Electromagnetic Fields and Waves: Preface
Aim of the study element
To explain the basic concepts of electrostatics, magnetism, electromagnet waves and fields, and to use this knowledge to solve complex electrical engineering problems, electrical devices and materials analysis.
Having successfully completed this element you will be able:
- Understand and use the concepts of electrostatics.
- Understand and use the concepts of magnetism.
- Analyse electrical and magnetic
- Use main electro- and magnetostatic rules and theorems applied to real situations.
- Apply Maxwell equations to circuits.
- Use mathematical tools for circuits in an electromagnetic environment.
- Electric field – Columb law.
- Gauss theorem.
- Work in electrostatic fields.
- Conductors in electrostatic fields.
- Electric fields in insulators.
- Magnetic fields in a vacuum.
- Magnet induction.
- Electromotive force.
- Magnetic fields in compounds.
- Maxwell theory.
Electromagnetic induction occurs in different ways. For example, when current changes in the circuit, there is different kinds of EMF that occurs in the…
A magnetic field is characterised by the energy parameter. If we turn the switch S to position 2 (Figure 33), the current in the…
Let’s consider magnets. Magnets are substances that create the magnetic field around them, without currents through the magnets. However, there are micro-currents that operate…
Let’s consider the solenoid that creates a magnetic field when DC current goes through the coil. The field in the solenoid is uniform, and…
Depending on the value of magnetic permittivity, magnetic substances are divided by the diamagnetics, paramagnetics and ferromagnetics. The first two classes are weak magnetics.…
Still a question that has to be answered is why conductivity electrons are moving in the magnetic field in the conducting circuit. (Figure 37).…
Variable magnetic fields create a vortex electric field in the conductor, which leads to the electric current appearance in the conductor. Let’s consider two…