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 _______
A. stored in the magnetic field
B. stored in the electric field
C. divided equally between the magnetic and electric fields
D. zero
Answer:A
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 _______
A. stored in the magnetic field B. stored in the electric field C. divided equally between the magnetic and electric fields D. zero
Explanation: As the movable part is fixed, Wmech=0, we know, Welec=Wmech+ Wfld,therefore, Welec=Wfld.