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Rangkaian sederhana 3 hambatan identik R seperti gambar. Jika titik A dan C diberi beda potensial 120 volt, maka potensial V BC adalah ....

Rangkaian sederhana 3 hambatan identik R seperti gambar.

Jika titik A dan C diberi beda potensial 120 volt, maka potensial VBC adalah ....

  1. 40 V

  2. 72 V

  3. 80 V

  4. 96 V

  5. 100 V

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1 over straight R subscript paralel equals 1 over straight R plus fraction numerator begin display style 1 end style over denominator begin display style straight R end style end fraction fraction numerator begin display style 1 end style over denominator begin display style straight R subscript paralel end style end fraction equals fraction numerator begin display style 2 end style over denominator begin display style straight R end style end fraction straight R subscript paralel equals fraction numerator begin display style straight R end style over denominator begin display style 2 end style end fraction straight V tilde straight R rightwards arrow straight V subscript AB over straight V subscript BC equals fraction numerator begin display style straight R subscript AB end style over denominator begin display style straight R subscript B C end subscript end style end fraction fraction numerator straight V subscript AC minus straight V subscript BC over denominator straight V subscript BC end fraction equals fraction numerator begin display style straight R subscript A B end subscript end style over denominator begin display style straight R subscript B C end subscript end style end fraction fraction numerator 120 minus straight V subscript BC over denominator straight V subscript BC end fraction equals fraction numerator straight R over denominator left parenthesis fraction numerator begin display style straight R end style over denominator begin display style 2 end style end fraction right parenthesis end fraction fraction numerator begin display style 120 minus straight V subscript BC end style over denominator begin display style straight V subscript BC end style end fraction equals 2 120 minus straight V subscript BC equals 2 space straight V subscript BC 120 equals 3 space straight V subscript BC straight V subscript BC equals 40 space straight V

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Perhatikan gambar susunan hambatan di bawah ini! Besar kuat arus yang melalui R 1 adalah ....

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