Matla a motlakase a sa fetoheng – mathata le ditharollo
1. Haeba matla a motlakase a sa fetoheng a 144 N, sebaka se pakeng tsa litefiso ka bobeli ke sefe … (1 μC = 10 -6 C le k = 9.10 9 Nm 2 .C -2 )
Tse tsejoang:
Matla a motlakase (F 12 ) = 144 N
Tefiso 1 (q 1 ) = 10 μC = 10 x 10 -6 C
Tefiso 2 (q 2 ) = 4 μC = 4 x 10 -6 C
E sa fetoheng (k) = 9 x 10 9 Nm 2 .C -2
C = Coulomb, N = Newton, m = mithara
Ho batloa: Sebaka se pakeng tsa litefiso ka bobeli (r)
Tharollo:
Tekanyo ea molao oa Coulomb :
F = matla a motlakase a sa fetoheng, k = kamehla ea Coulomb, q = tjhaja ea motlakase, r = sebaka se pakeng tsa litefiso ka bobeli
Sebaka pakeng tsa litefiso ka bobeli (r) = 5 x 10 -2 metres = 5 x 10 -2 x 10 2 cm = 5 cm.
2. Litefiso tse peli tse arotsoeng ka sebaka sa r . Haeba matla a motlakase a sa fetoheng e le 3.6 N, sebaka se pakeng tsa litefiso ka bobeli ke sefe (1 μC = 10 -6 C le k = 9.10 9 Nm 2 .C -2 )
Tse tsejoang:
Matla a motlakase (F 12 ) = 3.6 N
Tefiso 1 (q 1 ) = 9 μC = 9 x 10 -6 C
Tefiso 2 (q 2 ) = 4 μC = 4 x 10 -6 C
Sephetho sa Coulomb (k) = 9 x 10 9 Nm 2 .C -2
C = Coulomb, N = Newton, m = mithara
Ho batloa: Sebaka se pakeng tsa litefiso ka bobeli (r)
Tharollo:
Sebaka pakeng tsa litefiso ka bobeli (r) = 0.3 m = 0.3 x 100 cm = 30 cm.
3. Litefiso tsa lintlha tse tharo joalo ka ha ho bontšitsoe setšoantšong se ka tlase. Boholo ba matla a motlakase a sa fetoheng ntlheng ea A ke bofe (k = 9.10 9 Nm 2 .C -2 ; 1 μ = 10 -6 )
Tse tsejoang:
lefisa A (q)A) = -2 μC = -2 x 10-6 C
Tefiso B (q B ) = 8 μC = 8 x 10 -6 C
Tefiso C (q C ) = 4,5 μC = 4,5 x 10 -6 C
Sephetho sa Coulomb (k) = 9 x 10 9 Nm 2 .C -2
Sebaka se pakeng tsa litefiso A le B (r AB ) = 4 cm = 4 x 10 -2 m
Sebaka se pakeng tsa litefiso A le C (r AC ) = 3 cm = 3 x 10 -2 m
C = Coulomb, N = Newton, m = mithara
Ho batloa: Matla a motlakase a sa fetoheng ntlheng ea A
Tharollo:
Tekanyo ea molao oa Coulomb:
F = matla a motlakase a sa fetoheng , k = kamehla ea Coulomb , q = tjhaja ea motlakase , r = sebaka se pakeng tsa litefiso ka bobeli
Matla a motlakase a sa fetoheng ntlheng ea A:
4. Litefiso tsa lintlha tse tharo joalo ka ha ho bontšitsoe setšoantšong se ka tlase. Boholo ba matla a Coulomb bo fumanoeng ke Charge B ke bofe (k = 9.10 9 Nm 2 .C -2 ; 1 μC = 10 -6 C ).
Tse tsejoang:
q A = 10 µC = 10 x 10 -6 C = 10 -5 Coulombs
q B = 10 µC = 10 x 10 -6 = 10 -5 Li-Coulomb
q C = 20 µC = 20 x 10 -6 = 2 x 10 -5 Coulombs
r AB = 0.1 mitha = 10 -1 m
r BC = 0.1 meter = 10 -1 m
k = 9 x 10 9 Nm 2 C −2
Ho batloa: Matla a Coulomb a fumanwang ke Charge B
Tharollo:
Ho na le mabotho a mabeli a coulomb a sebetsang ho qoso ea B, matla a Coulomb pakeng tsa litefiso A le B (F AB ) le matla a Coulomb pakeng tsa litefiso B le C (F BC ). Matla a Coulomb a fumanoang ke qoso ea B ke matla a sa feleng a F AB le F BC.
Matla a Coulomb pakeng tsa litefiso A le B:
Tefiso A e saennweng e le ntle mme tefiso B e saennwe e le ntle e le hore F AB e totobatse ho tefiso C.
Matla a Coulomb pakeng tsa litefiso B le C:
Tefiso B e saennwe hantle mme tefiso C e saennwe hantle e le hore F BC e supe ho tefiso A.
Matla a Coulomb a fumanwang ke tjhaja B:
F B = F BC – F AB = 180 – 90 = 90 N
Matla a Coulomb a fumanwang ke tjhaja B (F B ) ke 90 Newtons. Tataiso ya F B e tshwana le tataiso ya dintlha tsa F BC ho tjhaja A.
5. Fumana boholo le tataiso ea matla a Coulomb holim'a tjhaja B ( k = 9 x 10 9 Nm 2 C −2 , 1 μC = 10 −6 C).
Tse tsejoang:
Tefiso A (q A ) = +Q
Tefiso B (q B ) = -2Q
Tefiso C (q C ) = -Q
Sebaka se pakeng tsa litefiso A le B (r AB ) = r
Sebaka se pakeng tsa litefiso B le C (r BC ) = 2r
k = 9 x 10 9 Nm 2 C −2
Ho batloa: Boholo le tataiso ea lebotho la Coulomb le qosang B
Tharollo:
Matla a Coulomb pakeng tsa litefiso A le B:
Tefiso A ke e ntle mme tefiso B ke e mpe hoo tsela eo F AB e supang ho tefiso A ka yona.
Matla a Coulomb pakeng tsa tjhaja B le tjhaja C:
Tefiso B ke e mpe mme tefiso C ke e mpe hoo tataiso ya F BC e supang ho tefiso A.
Molao oa matla a marang-rang o qositsoeng B:
F = FAB +FBC = 2 k Q2/r2 + 0.5 k Q2/r2 = 2.5 k Q2/r2 = 2.5 k Q2 r-2
Tsela eo matla a kgutlisetswang ka yona ho tjhaja A kapa ho ya ka letsohong le letshehadi.
