Electrical Machines

timer Asked: Jan 23rd, 2021

Question Description

I'm working on a electrical engineering multi-part question and need an explanation to help me study.

Table contains the data from the experiment in which the inductance of the solenoid (in mH) was measured as a position of x (cm), where x=0corresponds to the solenoid being fully retracted.

x 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8

L 11.8 11.3 10.8 10.5 10.3 10.3 10.2 10.2 10.2 10.1

Use fourth order polynomial fit to find the expression for inductance of the solenoid

as a function of x.

4.2) Find the expression for force as a function of x (Enter the coefficients of x in the

google form), consider current of 0.75+W/4 A

4.3) Whether the solenoid is moving towards x=0 (force is negative, negative direction of

x) or the solenoid is moving in the positive direction of x (force is positive)

4.4)Upload the graph obtained for force vs distance.

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