hukum ohm & series circuit

8/9/2019 Hukum Ohm & Series Circuit

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HUKUM OHM & S ERIES C IRCUIT


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H UKUM O HM

Takrifan : arus yang mengalir dalam suatu litar berkadar terus dengan voltan dan berkadar songsang dengan rintangan beban pada suhu

tetap.


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F ORMULA H UKUM O HM

V= IR

y

I=

arus yang mengalir melalui rintangan beban( A mpere, A )y V = voltage merentasi rintangan beban (volt, V )y R = rintangan beban ( O hm, )


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S ERIES C IRCUITSIn a se ries circuit, the electrons in the current have to pass throughall the components, which are arranged in a line.


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S ERIES C IRCUITSC onsider a typical series circuit in which there are three resistors of value R 1 , R 2 , and R 3 . The values may be the same, or different.


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C HARA CTE

R IST

IC O F SE

R IE

S CCT

There are two key points about a seriescircuit:

y

Thecu

rr e

nt throughout the circuit is thesamey The vol tag es add up to the battery voltage.


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V OLT

AGE

IN SE

R IE

S CCT

Therefore:

VT

= V 1 + V 2 + V 3


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V OLT

AGE

IN SE

R IE

S CCT

F rom O hms Law we know:V T = IR T;V 1 = IR 1 ;V 2 = IR 2 ;V 3 = IR 3

IR T = IR 1 + IR 2 + IR 3


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RE

SIST

A NCE

IN SE

R IE

S CCT

Therefore:

This is true for any number of resistors in series.


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C AL C ULAT

IO N

Merujuk kepada rajah di atas. Hitung :

1. Jumlah rintangan litar, R t2. Arus litar, I t3. Susut voltan pada perintang R14. Voltan pada titik X5. Lesapan kuasa pada perintang R4

Diberi nilai :

Vs = 10 VR1 = 30 R2 = 3kR3 = 3.5k R4 = 230R5 = 50


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J umlah rintangan litar, R t

R t = R1 + R 2 + R 3 + R4 + R5= 30 + 3 k + 3 .5k + 230 + 50= 6.8 1 k


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A rus litar, It

It = V s

R t= 10 V

6.8 1 k= 1 .47 m A


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hukum ohm & series circuit

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