**TI82** TxtView file generated by CalcText - KouriT EPHYECÿpohiy1.1.4. Ub=L.di/dt + ri regime permanent : di/dt=0 donc Ub=r.i 1.2.1.b. TOa=1.2ms et TOb=2.4ms 2.1. Ul=L.di/dt 2.2. i=dq/dt et q=C*Uc donc i=d(C.Uc)/dt=C. dUc/dt 2.3. Uc+Ul=0 // Uc + L.di/dt=0 donc Uc+L.d(C. dUc/dt)=0 donc Uc + LC. dČUc/dČt=0 2.4. on modifie: Uc/LC + dČUC/dtČ =0 on arrive a : Uc/LC=4piČ/ToČ . UC ToČ=4piČ.LC To=2pi.rac(LC) 2.5. To=50”s=5.0 * 10^-5 s 2.6. To=2pi.rac(LC) LC=(To/2pi)Č / L = 3.1 * 10^-9 F 3.1 frequence augmente car C constant. 3.2. frequence diminue, inductance augmente autre metal.ÿڝ