CHAPTER08 : FORCES AND TORQUES IN ELECTROMAGNETIC SYSTEMS

Example E02 : Pg 129

In [1]:
x=0.01 # length in metres
L=0.03+(270*x*x) # equation provided in the textbook
print"L(0.01)=",L,"H"
w=377. # angular  frequency in rad/sec
XL=w*L
print"XL=wL=",XL,"ohm"# ans may vary due to toundoff error
I=1. # current in ampere
V=I*XL
print"V=IXL=",V,"V"# ans may vary due to toundoff error
a=540. # comes from an equation in textbook,unit is henry/metre
f=(1./2.)*(a*x)
print"f=",f,"N"

L(0.01)= 0.057 H
XL=wL= 21.489 ohm
V=IXL= 21.489 V
f= 2.7 N