Lipotso tsa Mohlala oa Molao oa Coulomb

Mehlala e 10 ea Molao oa Coulomb

1. Litefiso tse peli li hlophisitsoe joalo ka ha ho bontšitsoe setšoantšong se ka tlase. Tefiso ho A ke +8 micro Coulombs 'me tefiso ho B ke -5 micro Coulombs. Matla a Coulomb e sebetsang liqosong ka bobeli ke... (k = 9 x 10⁹ Nm²C^-2, 1 micro Coulomb = 10^-6 C)

Puisano
Hoa tsebahala :

E botsitsoe : Boholo ba matla a motlakase a sebetsang liqosong ka bobeli
Jawab :

Foromo Molao oa Coulomb :

E kholo matla a motlakase e sebetsang hodima meroalo ka bobedi:

2. Tefiso ea motlakase P = +10 micro Coulombs le tefiso ea motlakase Q = +20 micro Coulombs li arotsoe joalo ka ha ho bontšitsoe setšoantšong. Boholo ba matla a Coulomb a sebetsang liqosong ka bobeli ke…

Puisano
Hoa tsebahala :

E botsitsoe : Boholo ba lebotho la Coulomb le sebetsang liqosong ka bobeli
Jawab :

Boholo ba matla a Coulomb kapa matla a motlakase a sebetsang hodima ditefiso ka bobedi ke 125 Newtons.

3. Litefiso tse tharo tsa motlakase li behiloe ka thoko joalo ka ha ho bontšitsoe setšoantšong! Tefiso A = -5 micro Coulombs, tefiso B = +10 micro Coulombs, le tefiso C = -12 micro Coulombs. Boholo le tataiso ea matla a motlakase a tjhajang B ke…

Puisano
Hoa tsebahala :

E botsitsoe : Boholo le tataiso ea matla a motlakase a tjhajang B
Jawab :
Matla a motlakase a tjhajwang B a bakwa ke matla a motlakase a pakeng tsa ditefiso A le B le matla a motlakase a pakeng tsa ditefiso B le C.
Matla a motlakase pakeng tsa litefiso A le B :

Tefiso A ke e mpe mme tefiso B ke e ntle kahoo tataiso ya matla a Coulomb e lebile tjhaja A mme e hole le tjhaja B (ka letsohong le letshehadi).
Matla a motlakase pakeng tsa litefiso B le C :

Tefiso B ke e ntle mme tefiso C ke e mpe kahoo tataiso ya matla a Coulomb e lebile tjhaja C mme e le hole le tjhaja B (ka ho le letona).
Matla a motlakase a hlahang a tjhaja B :
Tataiso ea F_AB ka letsohong le letšehali le ka lehlakoreng la F_BC Ho ea ka botoneng.
F_B =F_AB - F_BC = 675 N – 125 N = 550 Newtons.
Tsela eo matla a motlakase a hlahang ka eona a tjhajwang B (F)_B) = tataiso ea matla a motlakase F_AB, e leng ho ya ho tjhaja C (ka ho le letona).

4. Tefiso ea motlakase +Q₁ = Li-Coulomb tse nyenyane tse 10, +Q₂ = Li-Coulombs tse nyane tse 50 le Q₃ e arotsoe joalo ka ha ho bontšitsoe setšoantšong. E le hore matla a motlakase a sebetsang holim'a tjhaja Q₂ = lefela ebe tefiso Q₃ ke…

Puisano
Hoa tsebahala :
Tefiso ea 1 (q)₁) = +10 μC = +10 x 10^-6 Coulomb
Tefiso ea 2 (q)₂) = +50 μC = +50 x 10^-6 Coulomb
Sebaka se pakeng tsa litefiso tsa 1 le 2 (r₁₂) = 2 cm = 0,02 m = 2 x 10^-2 m
Sebaka se pakeng tsa litefiso tsa 2 le 3 (r₂₃) = 6 cm = 0,06 m = 6 x 10^-2 m
Matla a motlakase a hlahang a tjhaja 2 (F)₂= 0
E botsitsoe : tefiso 3 (q₃)
Jawab :
Matla a motlakase a tjhajwang 2 a bakwa ke matla a motlakase a pakeng tsa ditefiso tsa 1 le 2 ka matla a motlakase a pakeng tsa ditefiso tsa 2 le 3.
Matla a motlakase pakeng tsa litefiso tsa 1 le 2 :

Tefiso ea 1 e ntle 'me tefiso ea 2 e ntle kahoo tsela ke F₁₂ e lebile tjhaja ya 3 (ka ho le letona).
Matla a motlakase pakeng tsa litefiso tsa 2 le 3 :

Tefiso ea 2 e ntle 'me tefiso ea 3 e ntle kahoo tsela ke F₂₃ e lebile tjhaja ya 1 (ka letsohong le letshehadi).
Matla a motlakase a hlahang a tjhajwa 2 = 0 :
Tataiso ea F₁₂ ho ea ka ho le letona le ka lehlakoreng F₂₃ Ka ho le letšehali.

5. Setšoantšong se ka lehlakoreng, matla a kgutlisang a fumanwang ke ditjhaja tse pedi ke 144 N, kahoo sebaka se pakeng tsa ditjhaja tse pedi ke… (1 μC = 10^-6 C le k = 9.10⁹ Nm².C^-2)

A. 4 cm

B. 5 cm

Bolelele ba lisenthimithara tse 8

D. 10 cm

E. 12 cm

Puisano

Hoa tsebahala hore:

Matla a motlakase (F)₁₂) = 144 N

Tefiso ea 1 (q)₁) = 10 μC = 10 x 10^-6 C

Tefiso ea 2 (q)₂) = 4 μC = 4 x 10^-6 C

Sephetho sa Coulomb (k) = 9: x 10⁹ Nm².C^-2

C = Coulomb, N = Newton, m = mithara

O botsitse: Sebaka se pakeng tsa litefiso tse peli (r)

Karabo:

Foromo ea molao oa Coulomb:

Tlhaloso: F = matla a motlakase, k = kCoulomb e sa fetoheng, q = tjhaja ya motlakase, r = sebaka se pakeng tsa tjhaja tse pedi tsa motlakase.

Sebaka se pakeng tsa litefiso tse peli (r) = 5 x 10^-2 limithara = 5 x 10^-2 x 10² Sentimithara = disentimitara tse 5.

Karabo e nepahetseng ke B.

6. Lichaja tse peli tsa motlakase li bontšitsoe setšoantšong se ka tlase. Haeba matla a Coulomb a fumanoang ke lichaja ka bobeli e le 3,6 N, joale sebaka se pakeng tsa lichaja tse peli ke… (1 μC = 10^-6 C le k =9.10⁹ Nm².C^-2)

A. 30,0 cm

B. 27,0 cm

Bolelele ba lisenthimithara tse 9,0

D. 3,0 cm

E. 0,3 cm

E. 12 cm

Puisano

Hoa tsebahala hore:

Matla a motlakase (F)₁₂) = 3,6 N

Tefiso ea 1 (q)₁) = 9 μC = 9 x 10^-6 C

Tefiso ea 2 (q)₂) = 4 μC = 4 x 10^-6 C

Sephetho sa Coulomb (k) = 9: x 10⁹ Nm².C^-2

C = Coulomb, N = Newton, m = mithara

O botsitse: Sebaka se pakeng tsa litefiso tse peli (r)

Karabo:

Foromo ea molao oa Coulomb:

Tlhaloso: F = matla a motlakase, k = kCoulomb e sa fetoheng, q = tjhaja ya motlakase, r = sebaka se pakeng tsa tjhaja tse pedi tsa motlakase.

Sebaka se pakeng tsa litefiso tse peli (r) = limithara tse 0,3 = 0,3 x 100 Sentimithara = disentimitara tse 30.

Karabo e nepahetseng ke A.

7. Litlhaselo tsa lintlha tse tharo li fumaneha likhutlong tsa khutlotharo, joalo ka ha ho bontšitsoe setšoantšong. Boholo ba matla a Coulomb ntlheng ea A ke… (k = 9.10⁹ Nm².C^-2;; 1 μ = 10^-6)

A. 10 N

B. 60 N

C. 90 N

D. 902 N

E. 1002 N

Puisano

Hoa tsebahala hore:

Tefiso 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 10⁹ Nm².C^-2

Sebaka se pakeng tsa litefiso A le B (r)_AB) = 4 cm = 4 x 10^-2 mitha

Sebaka se pakeng tsa litefiso A le C (r)_AC) = 3 cm = 3 x 10^-2 mitha

C = Coulomb, N = Newton, m = mithara

O botsitse: Matla a motlakase ntlheng ea A

Karabo:

Foromo ea molao oa Coulomb:

Tlhaloso: F = matla a motlakase, k = kCoulomb e sa fetoheng, q = tjhaja ya motlakase, r = sebaka se pakeng tsa tjhaja tse pedi tsa motlakase.

Matla a motlakase ntlheng ea A:

F_AB le F_AC e etsa sekhutlo se nepahetseng e le hore matla a hlahang a baloe ho sebelisoa foromo Pythagoras.

Karabo e nepahetseng ke D.

8. Lintho tse peli tse nang le tjhaja ea motlakase Q₁ le Q₂ ka sebaka sa r cm, e hlahisa matla a nyonyehang a 10 N. Ebe tjhaja Q₁ e fetotsoe e le hore matla a hlahang a be 40 N. K e sa fetoheng = 9 x 10⁹ Nm².C^-2, ebe tefiso Q₁ e tlameha ho fallisoa ke…

A. 1/2 r hole le Q₂

B. 1/2 r e atamela Q₂

C. 1 r e tloha ho Q₂

D. 2 r e atamela Q₂

E. 2 r e tloha ho Q₂

Puisano

Hoa tsebahala hore:

Sebaka Q₁ le Q₂ = r cm

Matla a phephetsang (F) = 10 N

Haeba tefiso Q₁ Matla a fetotsweng, a nyonyehang (F) = 40 N

E sa fetoheng (k) = 9 x 10⁹ Nm².C^-2

O botsitse: tefiso Q₁ e tlameha ho fallisoa ke…

Karabo:

Foromo ea matla a motlakase:

F = k Q₁ Q₂ /r²

Sebaka (r) se lekana ka tsela e fapaneng le matla (F). Sena se bolela hore haeba matla a le maholo, sebaka se pakeng tsa litefiso se tla ba se senyenyane. Kahoo tefo Q₁ e tlameha ho fetoloa atamela tefiso Q₂.

Karabo e nepahetseng ke B.

9. Tefiso ea motlakase +q₃ = 20 μC, +q₂ = 10 μC le q₁ e arotsoe joalo ka ha ho bontšitsoe setšoantšong. E le hore lebotho la Coulomb le sebetsang holim'a qoso q₂ = lefela ebe tefiso q₁ ke …
A. +2 μC
B. –2 μC
C. +5 μC
D. –5 μC
E. +8 μC
Puisano:
Hoa tsebahala :
+q₃ = 20 μC
+q₂ = 10 μC
E botsitsoe :
q₁ = ?
Jawab :
Tefiso e lefshoang q₂ basebetsi ba F₂₃ le F₂₁, moo F₂₃ e lebisitsoe ka letsohong le letšehali. E le hore matla a hlahang a sebetse ho q₂ e lekana le lefela ebe q₁ e tlameha ho ba ntle e le hore matla a F₂₁ ho ya ka ho le letona.
Tefiso q₁ = +5 μC.
Karabo e nepahetseng ke C.

10. Litefiso tse tharo tsa motlakase +q₁= 5 μC, +q₂ = 10 μC le +q₃ = 10 μC moleng. Haeba a = 10 cm joale boholo le tataiso ea matla a motlakase a sebetsang holim'a tjhaja q₂ ke… (k = 9 x 10⁹ Nm²C^-2)

A. 7,5 N ho ea ho q₁
B. 11,25 N ho ea ho q₂
C. 15 N ho ea ho q₁
D. 22,5 N ho ea ho q₁
E. 78,75 N ho ya ho q₁
Puisano:
Hoa tsebahala :
q₁= 5 μC, q₂ = 10 μC le q₃ = 10 μC
a = 0,1 m

E botsitsoe :
Boholo le tataiso ea matla a Coulomb a hlahang ho q₂ ?
Jawab :
Ho na le mabotho a mabeli a Coulomb a sebetsang ho q₂, e leng F₂₁ le F₂₃, moo tataiso ea matla ana a mabeli e fapaneng. q₁ e ntle le q₂ e ntle e le hore matla a F₂₁ ho leba ka ho le letona (ho ea ho q)₃). q₂ e ntle le q₃ e ntle e le hore matla a F₂₃ ho leba ka letsohong le letšehali (ho ea ho q)₁).

Boholo ba matla a motlakase a hlahang = 90 N – 11,25 N = 78,75 N.
Tsela eo matla a hlahang ka yona e tshwana le tsela eo matla a tsamayang ka yona F₂₃, ho ea ho q₁.
Karabo e nepahetseng ke E.