... = = 14 .10 = 7 .10 L=7 .10 C (2) C. C C Th (2) vo (1) ta c: 7 .10 4.C2 = (2. 330) Suy ra: C =1, 82 .10 -6 F; L=7 .10 4.C=7 .10 4 1, 82 .10 -6=0 ,12 8 H 1 1 f= = = 500 Hz M: ZC = = C.2. Zc 1, 82 .10 2.3 ,14 .17 5 ... m=m0.2-k ( k= 24 11 Na cũn li 12 g Bit 24 11 Na D: 15 giõy t ) 2-k= 0,25 T= 15 h T VII.9 Cho phn ng ht nhõn: 1T + D + n Bit mT = 3, 016 05u; mD = 2, 014 11u; m = 4,00260u; mn = 1, 00867u; 1u=931MeV/c2.Nng ... súng 10 0m thỡ in dung ca t in phi cú giỏ tr l : A 11 2,6pF B 1, 126nF C 1, 126 .10 -10 F Chn A.Hng dn: = cT0 = c LC Suy : C = Cõu 68: Súng FM ca i H Ni cú bc súng = A 90 MHz ; B 10 0 MHz ; 10 D 1, 126pF...