Question

Ce valoare are fluxul magnetic in centrul unei spire circulare, confectionata dintr-un conductor cu lungimea de 63 cm, ce este traversat de un curent de 30 A si niu= 4 $\pi$*10 la puterea -7 N/A^2

Answer 1

Ф=B*S*cos90
cos90=1
$B= \frac{μ₀ *μr* I }{2πr}$ = $\frac{4pi*10^{-7}*1*30 }{63*10⁻²} =5,98*10^{-5} T$

2πr=lungimea cercului =63*10⁻²=> r=63*10⁻²/2pi=10,03 *10⁻²m=0,1 m
 Ф=B*π*r²=5,98*10⁻⁵*3,14*0,1²=0,18*10⁻⁵ Wb