14. Medan listrik di muatan uji disebabkan muatan 2 μC.
E = k.Q/r²
E = 9.10⁹. 2.10⁻⁶/0,2²
E = 4,5. 10⁵ N/C
15. Muatan uji harus diletakkan di sebelah kiri Qa sejauh r dari Qa
Fac = Fbc
k.Qa.Qc/r² = k.Qb.Qc/(18+r)²
Qa/r² = Qb/(18+r)²
Qa/Qb = r²/(18+r)²
3/12 = r²/(18+r)²
r/(18+r) = 1/2
r = 9 + 1/2. r
1/2. r = 9
r = 18 cm
0-------------0--------------0
Qc__r__Qa__18___Qb
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14. Medan listrik di muatan uji disebabkan muatan 2 μC.
E = k.Q/r²
E = 9.10⁹. 2.10⁻⁶/0,2²
E = 4,5. 10⁵ N/C
15. Muatan uji harus diletakkan di sebelah kiri Qa sejauh r dari Qa
Fac = Fbc
k.Qa.Qc/r² = k.Qb.Qc/(18+r)²
Qa/r² = Qb/(18+r)²
Qa/Qb = r²/(18+r)²
3/12 = r²/(18+r)²
r/(18+r) = 1/2
r = 9 + 1/2. r
1/2. r = 9
r = 18 cm
0-------------0--------------0
Qc__r__Qa__18___Qb