... + R.I2AB t UAB = Ep + (R + rp) IAB Suy IAB = (UAB - Ep)/(R+rp) = (UAB -Ep )/RAB (14.5 ) (14.6 ) Biu thc 14.5 , 14.6 th hin nh lut ụm cho on mch cha mỏy thu ni tip vi in tr R Cụng thc tng quỏt ca ... (UAB +E)/RAB (14.4 ) A C R E,r RAB = R + r : in tr ca on mch AB CM : Ta cú : UAB = UAC + UCB M UAC = r.IAB - E v UCB = IAB.R Suy : UAB = r.IAB - E + IAB.R = (R+r)IAB - E Biu thc 14.3 v 14.4 th hin ... rI (14.1 ) 1,3 Hay I = (E UBA)/r 1,3 Cú th vit IAB = (UAB+ E)/r (14.2 ) 1,2 Nu on mch AB cú cha ngun (E,r)1,2 0,1 0,20 0.30 0,40 0,50 I(A) Ni tip vi in tr R thỡ ta cú UAB = (R+r)IAB - E (14.3 )...