... 43 21 314 4CCCCU)CC(CQ++++=; eU.CCCCCCCCn43 21 32 41 e+++=; 423 1 eCCCC0n ==. 10 .9: ooUCCU == 8000V. 10 .10 : UBA = 2V. 10 .11 : Q = 1, 59àC; Q = 10 ,6àC. 10 .12 : ... 1, 25 .10 13 electron. 9.4: 1 21 2 21 2Fqq4)qq(F+=. 9.5: 7mgtgq sin 1, 1 .10 Ck= =. 9.6: a) 1, 35 .10 5 V/m; b) 3 ,1. 10 4 V/m; c) 1, 92 .10 4V/m; d) 1, 5 .10 4V/m; e) AN = 20cm, BN ... 12 21 12Er ErE1,7rr+==+5V v 12 12 rrr0,25rr= =+; c) 21 12 12 Er ErR12(E E ),75+= =; d) 2 12 ErR1,EE==5; e) 1 1 1 EI4r==A, 222EI3Ar== 12 .10 : a) I 1 ...