1. Amaphuzu amabili okukhokha, QA = +8 μC kanye ne-QB = -5 μC, zihlukaniswe yibanga elingu-r = 10 cm. Ubukhulu balobu bukhulu buyini? amandla kagesi. I-k engaguquki = 8.988 x 109 Nm2C-2 = 9 x109 Nm2C-2.
Kwaziwa:
Ishaja A (q A ) = +8 μC = +8 x 10 -6 C
Ishaja B (q B ) = -5 μC = -5 x 10 -6 C
k = 9 x 10 9 Nm 2 C −2
Ibanga phakathi kwezindleko A kanye no-B (r AB ) = 10 cm = 0.1 m
Okufunwayo : Ubukhulu bamandla kagesi
Isixazululo:
Ifomula yomthetho kaCoulomb :
Ubukhulu bamandla kagesi:
2. Izinhlayiya ezimbili ezishajiwe njengoba kuboniswe esithombeni esingezansi. Q P = +10 μC kanye no-Q q = +20 μC zihlukaniswe yibanga elingu-r = 10 cm. Ubukhulu bamandla kagesi buyini.
Kwaziwa:
Ishaja P (Q P ) = +10 μC = +10 x 10 -6 C
Ishaja Q (Q Q ) = +20 μC = +20 x 10 -6 C
k = 9 x 10 9 Nm 2 C −2
Ibanga eliphakathi kwamacala P kanye no-Q (r PQ ) = 12 cm = 0.12 m = 12 x 10 -2 m
Okufunwayo: Ubukhulu bamandla kagesi
Isixazululo:
3. Izinhlayiya ezintathu ezishajiwe zihlelwe emgqeni njengoba kuboniswe esithombeni esingezansi. Ishaja A = -5 μC, ishaja B = +10 μC kanye neshaja C = -12 μC. Bala amandla e-electrostatic aphelele ku-particle B ngenxa yamanye amashaja amabili.
Kwaziwa:
Ishaja A (q A ) = -5 μC = -5 x 10 -6 C
Ishaja B (q B ) = +10 μC = +10 x 10 -6 C
Ishaja C (q C ) = -12 μC = -12 x 10 -6 C
k = 9 x 10 9 Nm 2 C −2
Ibanga eliphakathi kwezinhlayiya u-A no-B (r AB ) = 6 cm = 0.06 m = 6 x 10 -2 m
Ibanga eliphakathi kwezinhlayiya B no-C (r BC ) = 4 cm = 0.04 m = 4 x 10 -2 m
Okufunwayo: Ubukhulu kanye nesiqondiso samandla kagesi aphelele ku-particle B
Isixazululo:
Amandla aphelele ku-particle B yisamba se-vector samandla u-F BA asetshenziswa ku-particle B yi-particle A kanye namandla u-F BC asetshenziswa ku-particle B yi-particle C.
Amandla e-F BA asetshenziswa ku-particle B yi-particle A:
Isiqondiso samandla kagesi sikhomba ku-particle A (iphuzu liye kwesobunxele).
Amandla u-F BC asetshenziswa ku-particle B yi-particle A:
Isiqondiso samandla kagesi sikhomba ku-particle C (khomba kwesokudla).
Amandla kagesi aphelele ku-particle B :
F B = F AB – F BC = 675 N – 125 N = 550 Newtons.
Isiqondiso samandla kagesi aphelele ku-particle B sikhomba ku-particle C (sikhomba ngakwesokudla).
4. +Q 1 = 10 μC, +Q 2 = 50 μC kanye no-Q 3 zihlukaniswe njengoba kuboniswe esithombeni esingezansi. Iyini ishaja ye-electrostatic ku-particle 3 uma amandla e-electrostatic aphelele ku-particle 2 engu-zero.
Kwaziwa:
Ishaja 1 (q 1 ) = +10 μC = +10 x 10 -6 C
Ishaja 2 (q 2 ) = +50 μC = +50 x 10 -6 C
Ibanga eliphakathi kwamacala 1 no-2 (r 12 ) = 2 cm = 0.02 m = 2 x 10 -2 m
Ibanga eliphakathi kweshaja 2 kanye neshaja 3 (r 23 ) = 6 cm = 0.06 m = 6 x 10 -2 m
Amandla kagesi aphelele ku-particle 2 (F 2 ) = 0
Okufunwayo : ishaja 3 (q 3 )
Isixazululo:
Amandla aphelele ku-particle 2 yisamba se -vector samandla F 21 asetshenziswa ku-particle 2 yi-particle 1 kanye namandla F 23 asetshenziswa ku-particle 2 yi-particle 3.
Amandla F 21 asetshenziswa ku-particle 2 yi-particle 1:
Isiqondiso samandla kagesi sikhomba ku-particle 3 (khomba kwesokudla).
Amandla F23 okusetshenziswa ku-particle 2 yi-particle 3: 
Isiqondiso samandla kagesi aqondile sikhomba ku-particle 1 (iphuzu liye kwesobunxele).
Amandla kagesi aphelele ku-particle 2 = 0:
