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teknik otomasi industri smk jilid 1

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P = Ι . R . I = Ι 2 . R<br />

P = Ι 2 . R<br />

R = tahanan / hambatan listrik .... ohm ( Ω )<br />

P = U . Ι Ι = U<br />

R<br />

= U . U<br />

R<br />

Dari persamaan :<br />

2<br />

U<br />

=<br />

R<br />

P = Ι 2 . R<br />

P = U<br />

2<br />

R<br />

Jika R adalah konstan, maka grafik P = ƒ (Ι)<br />

dapat digambarkan sebagai berikut :<br />

I<br />

( ma )<br />

Contoh : R = 1000<br />

P<br />

( w )<br />

100 100<br />

200 200<br />

300 300<br />

400 400<br />

500 500<br />

600 600<br />

700 700<br />

800 800<br />

900 900<br />

1000 1000<br />

89

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