Roboguru

Tiga muatan listrik diletakkan terpisah seperti gambar. Muatan A = -6 µC, muatan B = +12 µC dan muatan C = -14 µC. Besar dan arah gaya listrik pada muatan B adalah...

Pertanyaan

Tiga muatan listrik diletakkan terpisah seperti gambar. Muatan A = -6 µC, muatan B = +12 µC dan muatan C = -14 µC. Besar dan arah gaya listrik pada muatan B adalah...space 

Pembahasan Soal:

Asumsikan gaya yang mengarah ke kanan adalah positif, maka:

F subscript B equals F subscript B C end subscript minus F subscript B A end subscript F subscript B equals k fraction numerator Q subscript B Q subscript C over denominator r subscript B C end subscript squared end fraction minus k fraction numerator Q subscript B Q subscript A over denominator r subscript B A end subscript squared end fraction F subscript B equals k open parentheses fraction numerator Q subscript B Q subscript C over denominator r subscript B C end subscript squared end fraction minus fraction numerator Q subscript B Q subscript A over denominator r subscript B A end subscript squared end fraction close parentheses F subscript B equals 9 cross times 10 to the power of 9 open parentheses fraction numerator 12 cross times 10 to the power of negative 6 end exponent times 14 cross times 10 to the power of negative 6 end exponent over denominator 4 squared end fraction minus fraction numerator 12 cross times 10 to the power of negative 6 end exponent times 6 cross times 10 to the power of negative 6 end exponent over denominator 6 squared end fraction close parentheses F subscript B equals 9 cross times 10 to the power of 9 open parentheses fraction numerator 16 comma 8 cross times 10 to the power of negative 11 end exponent over denominator 16 end fraction minus fraction numerator 7 comma 2 cross times 10 to the power of negative 11 end exponent over denominator 36 end fraction close parentheses F subscript B equals 9 cross times 10 to the power of 9 open parentheses 1 comma 05 cross times 10 to the power of negative 11 end exponent minus 0 comma 2 cross times 10 to the power of negative 11 end exponent close parentheses F subscript B equals 9 cross times 10 to the power of 9 open parentheses 0 comma 85 cross times 10 to the power of negative 11 end exponent close parentheses F subscript B equals 7 comma 65 cross times 10 to the power of negative 2 end exponent space straight N

Karena positif maka gaya mengarah ke kanan.

Jadi, besar gaya pada muatan adalah 7,65 x 10-2 N mengarah ke kanan.

Pembahasan terverifikasi oleh Roboguru

Terakhir diupdate 02 Juni 2021

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