Răspuns:
Explicație:
Probabil I=50ma=0,05A
a) R=U/I=10/0,05=1000/5=200Ω
b) Conductanta este G=1/R=1/200=0,005 S
c) R=ρL/S,
S=0,35mm^2=0,000035m^2
scoatem L
L=RS/ρ=(200*0,000035)/(1,75*10^-8)=(0,007*10^8)/1,75=(7*10^5)/1,75=400.000m
