Principle of Energy Conversion

A coupling magnetic field must react with
(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

From the above, the correct statements are

A physical system of electromechanical energy conversion, consists of a stationary part creating a magnetic field with electric energy input, and a moving part giving mechanical energy output. If the movable part is kept fixed, the entire electrical energy input will be _______

The developed electromagnetic force and/or torque in electromechanical energy conversion systems, acts in a direction that tends to ___________
(i) increase the co-energy at constant flux
(ii) increase the co-energy at constant mmf
(iii) decrease the stored energy at constant mmf
(iv) decrease the stored energy at constant flux

Which of the above statements are correct?

The formula for energy stored in the mechanical system of linear motion type is ______

The developed electromagnetic force and/or torque in electromechanical energy conversion system, acts in such a direction that tends to ___________

The energy storing capacity of magnetic field is about ________ times greater than that of electric field?

In an electro-mechanical energy conversion device, the coupling field on the
(i) the electrical side is associated with emf and current
(ii) the electrical side is associated with torque and speed
(iii) mechanical side is associated with emf and current
(iv) mechanical side is associated with torque and speed

From the above, the correct statements are

What is the coupling field used between the electrical and mechanical systems in an energy conversion devices?

An electro-mechanical energy conversion device is one which converts _______