Basic Circuit Theory Chpter7 problems Reference answers to Selected Problems l:(a)12.5ms,80Hz,503rad/s,(b)278cos(160x-43.9)V;(c)66.1 2(a)117ms,(b)895Hz;(c)563rad/s;(d)-38.7°,8.0,(e)-1287,8.0;(f)0898 3:vs(t=412cos(500t116°)V 4:169.3V 5:(a)18.83∠1335°;(b)5.58∠-56.9°;(c)-00725+j0.047;(d0.0524+j0.1838 6:(a)1012e120=46v;b)0.67e06 7:(a)7.81∠39.8°;(b)3.0∠-563°;(c)6.36∠7.6 8:(a)958√2cos(ot94°)mA;(b)251∠-1116°mA 9(a)116∠-11°mA,(b)1.71∠1°mA 10:1g,1H DaLian Maritime UniversityBasic Circuit Theory Chpter7 Problems Reference Answers to Selected Problems 1: (a) 12.5 ms, 80 Hz, 503 rad/s; (b) 27.8 cos(160π -43.9 o )V; (c) 66.1 . o 2: (a) 11.17 ms; (b) 89.5 Hz; (c) 563 rad/s; (d) –38.7 o , 8.0; (e) –128.7, 8.0; (f) 0.898. 3: v (t)=412 cos(500t-116 ) V. 4: 169.3 V. S o 5: (a) 18.83 ; (b) 5.58 ; (c) – 0.0725 + j 0.047; (d)0.0524+j0.1838. o ∠133.5 o ∠ − 56.9 6: (a) 101.2e V; (b) 0.67e A. (200 41.6 )o j t− o j(10t−146.6 7: (a) 7.81 ; (b) 3.0 ; (c) 6.36 . o ∠39.8 o ∠ − 56.3 o ∠7.6 8: (a) 95.8 2 cos(ω t+94 ) mA; (b) 25.1 mA. o o ∠ −111.6 9: (a) 11.6 mA; (b) 1.71 mA. o ∠ −11 o ∠1 10: 1Ω , 1H. DaLian Maritime University 3