3.2 The X-i relationship for an electromagnetic system is given by 1.2i12 where g is the air gap length. For current 1-2 A and g = 10 cm, determine the mechanical force on the moving part (a) Using the energy of the system. (b) Using the coenergy of the system.

The λ-i relationship for an electromagnetic system is given by

λ = 1.2i^1/2 / g

where g is the air gap length. For current 1-2 A and g = 10 cm, determine the mechanical force on the moving part

(a) Using the energy of the system. 

(b) Using the coenergy of the system.