Question

Помогите решить 353 очень нужно!!!!

Answer 1

$T=2pisqrt{LC}Leftrightarrow C=dfrac{T^2}{4pi^2L}\ W=dfrac{LI_m^2}{2}=W_C+W_L\ W_C=dfrac{q^2}{2C}=dfrac{4pi^2Lq^2}{T^2}\ W_L=dfrac{LI^2}{2}\ dfrac{LI^2}2+dfrac{4pi^2Lq^2}{T^2}=dfrac{LI_m^2}{2}\ dfrac{4pi^2q^2}{T^2}=dfrac{I_m^2-I^2}{2}\ q^2=dfrac{(I_m^2-I^2)T^2}{8pi^2}$

$q=dfrac{Tsqrt2}{4pi}sqrt{I_m^2-I^2}=dfrac{6.3cdot10^{-6}cdot1.414}{4cdot3.142}sqrt{5^2-3^2}cdot10^{-3}=\=2.84cdot10^{-9}text{ C}$