GIVEN:A=3.5*10^-2
l=0.25m
L=40mH
Self inductance:
L=0N^2 A/l
N=sqrt((L*l)/0A)=sqrt((40*10^-3*0.25)/(4*pi*10^-7*3.5*10^-2))=477
How many turns should a solenoid of cross-sectional area 3.5times10^-2 m^2 and length 0.25 m have...
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