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Arus Bolak Balik - e-Learning Sekolah Menengah Kejuruan Arus Bolak Balik - e-Learning Sekolah Menengah Kejuruan

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= (6 – j 5) + (3,6 – j 4,8) = 9,6 – j 9,8 = 13,72 ? -45,6 o Contoh soal A R B C C L D V 150 V ? V V 50 ?F V V 1,2 H V V V V ? Tentukan: V = 85 2 sin (100 t - 2 ? ) a. Z AB b. Arus (I) dan sudut antara V dan I c. V AB , V BC , V CD DAN V AC Penyelesaian 85 2 ? a. V = ? ? ? 85? ? 45 V 2 4 W = 100 rad/s X L = W.L = 100 x 1,2 = 120.Ohm 1 X C = wc 1 100 x 50 x10 ? ? ? 6 200 ohm Modul.FIS.22 Arus Bolak-Balik 37

Z AB = R + j (X L – X C ) = 150 + J (120 – 200) 150 – J 80 2 2 Z AB ? 150 ? 80 ? 170 Ohm ? ? ? X ? ? 1 L C ? 1 o tg ? ? ? tg ? ? 28, 07 ? R X ? ? ?? 8? ? ? 15 ? o Z = 170 ? ? 28, 07 Ohm V b. I = Z 85? o ? 45 170? ? 28,07 = o o = 0,5 ? ? 16 , 93 ? ( 4, 78 ? j1, 46) A Sudut fase antara I dan V = -45 o – (-16,93 o ) = -28,07 o ) c. V AB = I Z = (5 ? -16,93) o (150) = (717,5 – j 218,4) C V BC = I . Z BC = (5 ? -16,93) o x 200 ? -90 o ) = 1000 ? -106,93 o V = -(291,2 + j 956,67) V V CD = I . Z CD = (5 ? -16,93 o ) (120 ? 90 o ) = (174,7 + j 57,4) V V AC = I . z AC Z AC = 150 – J 200 = 250 ? -53,13 o V AC = (5 ? -16,93 o ) (250 ? -53,13 o ) = 1250 ? -70 o V = (426,3 – j 1175,1) V Contoh soal 32 ? 84 ? 20 ? Modul.FIS.22 Arus Bolak-Balik V V 38

= (6 – j 5) + (3,6 – j 4,8) = 9,6 – j 9,8 = 13,72 ? -45,6 o<br />

Contoh soal<br />

A<br />

R<br />

B<br />

C<br />

C<br />

L<br />

D<br />

V<br />

150 V ?<br />

V<br />

V<br />

50 ?F<br />

V<br />

V<br />

1,2 H<br />

V<br />

V<br />

V<br />

V<br />

?<br />

Tentukan:<br />

V = 85 2 sin (100 t - 2 ? )<br />

a. Z AB<br />

b. Arus (I) dan sudut antara V dan I<br />

c. V AB , V BC , V CD DAN V AC<br />

Penyelesaian<br />

85 2 ?<br />

a. V = ? ? ? 85?<br />

? 45 V<br />

2 4<br />

W = 100 rad/s<br />

X L = W.L = 100 x 1,2 = 120.Ohm<br />

1<br />

X C =<br />

wc<br />

1<br />

100 x 50 x10<br />

? ? ? 6<br />

200 ohm<br />

Modul.FIS.22 Arus Bolak-Balik 37

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