Soal Dan Jawaban Teknik Dasar Listrik.docx

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Question 8 (10 points) Pada suatu rangkaian yang tidak diketahui nilai resistansinya, daya pada rangkaian tersebut yang terukur dengan wattmeter sebesar 250 W dengan tegangan terpasang 50 V, tentukan nilai resistansinya.

Dik: P = 250 w V =50 Dit : R…? Jawab : P = v²/R 250 = 50²/R 250 R =2500 R = 2500/250 R = 10 ohm

Question 3 (10 points) Tentukan nilai pada rangkain berikut!

Jawab R24 =R2+R4 =2Ω+2C = 4Ω R135 =1/R1+1/R3+1/R5

1/1Ω+1/2Ω+1/2Ω =1/1+1/2+1/2 =1=!/1 =2/1=1/2 Ω Rek =4Ω=1/2 Ω =9/2Ω =4,5 ohm

Question 1 (10 points) Tentukan nilai pada rangkain berikut!

Jawab : R1=12+4 = 16Ω R1 16Ω→Rp1 = 16x16/16+16=8Ω R2 =Rp1+7Ω=8+7 =15Ω R2 30Ω →Rp2 =15x30/15+30 =10 Ω Rek =Rp2+50Ω + 15Ω=10+50+15 =75Ω

Question 4 (10 points) Tentukan nilai pada rangkain berikut!

Jawab : R1 =10 mH R2= 25 mH R3=30 mH Lek =1/R1+1/R2+1/R3 =1/10+1/25+1/30 =5+2/50+1/30 =7/50+1/30 =21+5/150=26/150=13/75 Lek =75/13 =5,76Ω

Question 10 (10 points) Tentukan nilai arus i pada rangkaian berikut:

Jawab: Rp1 =48 Ωx16 Ω/48 Ω+16 Ω Rp1=12 Ω Rs1 =12 Ω+48 Ω Rs1 =60 Ω Rp2=40 Ωx40 Ωx30 Ωx60 Ω/40 Ω+40 Ω+30 Ω+60 Ω Rp2 = 10 Ω Jadi, Rek =10 Ω+6 Ω Rek=16 Ω It =24v/16 Ω It =1,5A I=10 Ω/30 Ωx1,5A I=0,5 A

Question 9 (10 points) Tentukan arus i pada rangkaian berikut:

Jawab R1=2Ω R2=12 Ω V=30 volt R total = 1/R1+1/R2 =1/2+1/12 =6+1/12=7/12=12/7 V=IxR I=v/R I=30 volt/12/7 I=7/12x30 I=7/12x30 I=210/12 I=17,5 A

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