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Tiga buah muatan titik membentuk bangun segitiga sama sisi seperti gambar berikut. Jika panjang satu sisinya 3 cm, maka resultan gaya listrik yang dialami di titik A sebesar ... ( 1 μ C = 1 0 − 6 dan k = 9 x 1 0 9 N . m 2 . C − 2 )

Tiga buah muatan titik membentuk bangun segitiga sama sisi seperti gambar berikut.

Jika panjang satu sisinya 3 cm, maka resultan gaya listrik yang dialami di titik A sebesar ... 

  1. 100 N

  2. 300 N

  3. 100 begin mathsize 14px style square root of 7 end style N

  4. 300 begin mathsize 14px style square root of 7 end style N

  5. 400 begin mathsize 14px style square root of 7 end style

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A. Aulia

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Diketahui space colon  straight q subscript straight A equals 2 space μC  straight q subscript straight B equals 5 space μC  straight q subscript straight C equals negative 15 space μC  straight r subscript AB equals straight r subscript AC equals straight r subscript BC equals 3 cm  straight k equals 9 cross times 10 to the power of 9 space Nm squared divided by straight C squared  straight F subscript straight A ?    Hitung space gaya space listrik space antara space muatan space straight A space dan space straight B space colon  straight F subscript AB equals straight k fraction numerator straight q subscript straight A straight q subscript straight B over denominator straight r subscript straight A straight B squared end fraction equals 9 cross times 10 to the power of 9 cross times fraction numerator left parenthesis 2 cross times 10 to the power of negative 6 end exponent right parenthesis left parenthesis 5 cross times 10 to the power of negative 6 end exponent right parenthesis over denominator left parenthesis 3 cross times 10 to the power of negative 2 end exponent right parenthesis squared end fraction  straight F subscript AB equals 100 space straight N    Hitung space gaya space listrik space antara space muatan space straight A space dan space straight C space colon  straight F subscript AC equals straight k fraction numerator straight q subscript straight A straight q subscript straight C over denominator straight r subscript straight A straight C squared end fraction equals 9 cross times 10 to the power of 9 cross times fraction numerator left parenthesis 2 cross times 10 to the power of negative 6 end exponent right parenthesis left parenthesis 15 cross times 10 to the power of negative 6 end exponent right parenthesis over denominator left parenthesis 3 cross times 10 to the power of negative 2 end exponent right parenthesis squared end fraction  straight F subscript AC equals 300 space straight N    Gaya space yang space dialami space muatan space straight A space adalah space colon  straight F subscript straight A equals square root of left parenthesis straight F subscript AB right parenthesis squared plus left parenthesis straight F subscript AC right parenthesis squared plus 2 straight F subscript AB straight F subscript AC cos space 120 to the power of 0 end root  straight F subscript straight A equals square root of left parenthesis 100 right parenthesis squared plus left parenthesis 300 right parenthesis squared plus left parenthesis 2 right parenthesis left parenthesis 100 right parenthesis left parenthesis 300 right parenthesis left parenthesis negative 1 half right parenthesis end root  straight F subscript straight A equals square root of 7 cross times 10 to the power of 4 end root  straight F subscript straight A equals 100 square root of 7 space straight N

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Suatu segitiga ABC sama sisi dengan sisi 1 m berada di udara. Pada titik-titik sudut A, B, dan C, terdapat muatan listrik masing-masing sebesar + 3 μ C , − 1 μ C dan + 2 μ C . Jika k = 9 × 1 0 9 Nm 2 ...

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