A coupling magnetic field must react with which of the following statements? (i) electrical system in order to extract energy from mechanical system(ii) mechanical system in order to extract energy from mechanical system(iii) electrical system in order to extract energy from electrical system(iv) mechanical system in order to extract energy from electrical system(v) electrical or mechanical system for electro-mechanical energy conversion

Magnetic Circuits topics include: Singly exicted magnetic systems and energy conversion principles.   A singly-excited system is one which consists of only one electrically energized coil to produce working magnetic field in the machine or any other electromechanical energy conversion device. Hence, the singly-excited system requires only one electrical input. The principle of electromechanical energy conversion states that when an electric current passes through a conductor in a magnetic field, the conductor moves. This movement can be used to convert electrical energy into mechanical... Show more

Magnetic Circuits topics include: Singly exicted magnetic systems and energy conversion principles.
 

A singly-excited system is one which consists of only one electrically energized coil to produce working magnetic field in the machine or any other electromechanical energy conversion device. Hence, the singly-excited system requires only one electrical input.

The principle of electromechanical energy conversion states that when an electric current passes through a conductor in a magnetic field, the conductor moves. This movement can be used to convert electrical energy into mechanical energy or vice versa. 

Here are some other principles related to electromechanical energy conversion:
The law of conservation of energy: Also known as the principle of energy conversion, this is the most fundamental principle of physics. It states that energy cannot be created or destroyed, but can only change from one form to another.
The fundamental principle of electromechanical energy conversion: This principle is based on the interaction between electric currents and magnetic fields. When an electric current passes through a conductor, it creates a magnetic field around it. Similarly, when a magnetic field is applied to a conductor, it induces an electric current in the conductor.
The total input energy of an electromechanical energy conversion device

This is equal to the sum of the following three components:
Energy dissipated
Energy stored
Useful output energy 

Electromechanical energy conversion devices include:
Transducers
Force-producing devices
Devices for continuous-energy conversion 

Electromechanical energy conversion finds applications in the following categories of systems:
Transducers
Force-producing devices
Devices for continuous-energy conversion

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