A solenoid having a cross section of 10 cm2 is shown in Figure P18.42.

a. Calculate the force exerted on the plunger when the distance x is 2 cm and the current in the coil (where N = 100 turns) is 5 A. Assume that the fringing and leakage effects are negligible. The relative permeabilities of the magnetic material and the non-magnetic sleeve are 2,000 and 1.

b. Develop a set of differential equations governing the behavior of the solenoid.





Find:

a. The force exerted on the plunger when the distance x is 2cm and the current is 5 A. Relative permeabilities of the magnetic material and the nonmagnetic sleeve are and .

b. Develop a set of differential equations governing the behavior of the solenoid.

Assumptions:

The fringing and leakage effects are negligible.


Analysis:



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