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Dua muatan listrik q1​ dan q2​ terletak dalam satu garis hubung seperti gambar berikut. Diketahui 1μC=10−6C dan k = 9.109 N.m2.C−2, maka kuat medan listrik pada titik C adalah....

Pertanyaan

Dua muatan listrik begin mathsize 12px style q subscript 1 end style dan begin mathsize 12px style q subscript 2 end style terletak dalam satu garis hubung seperti gambar berikut.

Diketahui begin mathsize 12px style 1 mu C equals 10 to the power of negative 6 end exponent C end style dan k = begin mathsize 12px style 9.10 to the power of 9 space N. m squared. C to the power of negative 2 end exponent end style, maka kuat medan listrik pada titik C adalah....

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Y. Maghfirah

Master Teacher

Jawaban terverifikasi

Pembahasan

begin mathsize 12px style R subscript A end style = 3 + 2 = 5 cm = begin mathsize 12px style 5 cross times 10 to the power of negative 2 end exponent space m end style

begin mathsize 12px style R subscript B end style = 2 cm = begin mathsize 12px style 2 cross times 10 to the power of negative 2 end exponent space m end style

begin mathsize 12px style q subscript A equals 2 mu C equals 2 cross times 10 to the power of negative 6 end exponent space C  q subscript B equals negative 2 mu C equals negative 2 cross times 10 to the power of negative 6 end exponent space C end style

Kuat medan listrik A yang dirasakan oleh C adalah:

begin mathsize 12px style E subscript A equals k fraction numerator q subscript A over denominator R subscript A superscript 2 end fraction  E subscript A equals open parentheses 9 cross times 10 to the power of 9 close parentheses fraction numerator open parentheses 2 cross times 10 to the power of negative 6 end exponent close parentheses over denominator open parentheses 5 cross times 10 to the power of negative 2 end exponent close parentheses squared end fraction  E subscript A equals 0 comma 72 cross times 10 to the power of 7 space N divided by C end style

Kuat medan listrik B yang dirasakan oleh C adalah:

begin mathsize 12px style E subscript B equals k fraction numerator q subscript B over denominator R subscript B superscript 2 end fraction  E subscript B equals open parentheses 9 cross times 10 to the power of 9 close parentheses fraction numerator open parentheses 2 cross times 10 to the power of negative 6 end exponent close parentheses over denominator open parentheses 2 cross times 10 to the power of negative 2 end exponent close parentheses squared end fraction  E subscript B equals 4 comma 5 cross times 10 to the power of 7 space N divided by C end style

Maka, kuat medan listrik total yang dirasakan oleh C adalah:

begin mathsize 12px style E subscript C equals E subscript B minus E subscript A  E subscript C equals open parentheses 4 comma 5 minus 0 comma 72 close parentheses cross times 10 to the power of 7 space N divided by C  E subscript C equals 3 comma 78 cross times 10 to the power of 7 space N divided by C end style

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Perhatikan gambar berikut! Muatan q3 diletakkan pada jarak 5 cm dari q2, maka kuat medan listrik pada muatan q3 adalah .... (1μC=10−6C)

3rb+

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Jawaban terverifikasi

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