1. Xisaabi baaxadda iyo jihada goobta korantada barta A oo ku taal 5 cm laga bilaabo dallacaadda dhibicda Q = +10 μC. k = 9 x 10 9 Nm 2 C −2 , 1 μC = 10 −6 C)
La yaqaan:
Dakhli koronto (Q) = +10 μC = +10 x 10 -6 C
Masaafada u dhaxaysa barta A iyo dallacaadda dhibicda Q (r A ) = 5 cm = 0.05 m = 5 x 10 -2 m
k = 9 x 10 9 Nm 2 C −2
La Doonayo: Cabbirka iyo jihada garoonka korantada ee barta A
Xalka:
Jihada garoonka korontada ee barta A:
Dareeraha korontadu waa mid togan sidaa darteed jihada goobta korontadu waxay ka fog tahay dareeraha korontada iyo dhibcaha A.
2. Xisaabi baaxadda iyo jihada goobta korantada ee barta P oo ku taal 10 cm laga bilaabo dallacaadda dhibicda Q = -2 0 μC. k = 9 x 10 9 Nm 2 C −2 , 1 μC = 10 −6 C.
La yaqaan:
Dakhli koronto (q) = -20 μC = -20 x 10 -6 C
Masaafada u dhaxaysa barta P iyo dallacaadda korontada (r P ) = 10 cm = 0.1 m = 1 x 10 -1 m
k = 9 x 10 9 Nm 2 C −2
La Doonayo: Cabbirka iyo jihada garoonka korantada ee barta P
Xalka:
Jihada garoonka korontada ee barta A:
Dareeraha korontadu waa taban sidaas darteed jihada garoonka korontadu u jeedo dareeraha korontadu waa taban.
3. Laba dalac oo dhibco ah ayaa kala fogaada masaafada 40 cm. Waa maxay baaxadda iyo jihada goobta korontada ee barta P ee u dhaxaysa labada dalac oo ah 20 cm u jirta barta A?
La yaqaan:
Dalac A (q A ) = -2 μC = -2 x 10 -6 C
Dalacaadda B (q B ) = + 4 μC = +4 x 10 -6 C
Masaafada u dhaxaysa dallacaadda A iyo barta P (r AP ) = 20 cm = 0.2 m = 2 x 10 -1 m
Masaafada u dhaxaysa dallacaadda B iyo barta P (r BP ) = 20 cm = 0.2 m = 2 x 10 -1 m
La Doonayo: Cabbirka iyo jihada goobta korantada ee barta P.
Xalka:
Kharash A waa taban si jihada meelaha korontada ku shaqeeya ay u jeeddo Q A (bidixda).
Dalacaadda B waa mid togan si jihada meelaha korontada laga helo ay uga fogaato Q B (bidixda).
Wadarta garoon koronto ee barta A:
E = E A + E B
E = (4.5 x 10 5 ) + (9 x 10 5 )
E = 13.5 x 10 5 N/C
Jihada goobta korontada waxay u jeeddaa Q A (bidixda).
4. Baaxadda goobta korontada waa eber marka loo eego...
Dalacaadda A waa togan, dalacaadda B-na waa togan, sidaa darteed baaxadda goobta korontada waa eber oo ku taal barta P, labada dallacba u dhexeeya.
La yaqaan:
Dalac A (q A ) = + 20 μC = +20 x 10 −6 C
Dalac B (q B ) = +40 μC = +40 x 10 −6 C
k = 9 x 10 9 Nm 2 C −2
Masaafada u dhaxaysa dallacaadda A iyo dallacaadda B = 20 cm
Kharashka u dhexeeya kharashka A iyo dhibicda P (r AP ) = a
Masaafada u dhaxaysa dallacaadda B iyo barta P (r BP ) = 20 – a
La Doonayo: Cabbirka garoonka korontadu waa eber oo ku yaal….
Xalka:
Baaxadda goobta korantada ee ay soo saarto dallacaadda A barta P
Dalacaadda A waa mid togan si jihada meelaha korontada laga helo ay uga fogaato dalacaadda A (midigta).
Baaxadda goobta korantada ee ay soo saarto dallacaadda B ee barta P:
Dalac B waa togan si jihada meelaha korontada laga helo ay uga fogaato dalac B (bidixda).
Wadarta garoon koronto ee barta P = 0:
Waxaan isticmaalnaa qaacidada labajibbaaran si aan u go'aamino a.
Baaxadda goobta korontada waa eber oo ku taal 8 cm laga bilaabo dallacaadda A ama 12 cm laga bilaabo dallacaadda B.
5. Iyada oo ku saleysan sawirka hoose, w halkan waa barta P si goobta korantada ee barta P ay eber u noqoto? (k = 9 x 10 9 Nm 2 C −2 , 1 μC = 10 −6 C)
Solution
To xisaabi xoogga goobta korantada ee barta P, oo la filayo barta P inay jirto kharash tijaabo oo togan. S1 waa mid togan iyo Q2 waa taban, sidaa darteed dhibicda P waa inay ku taal dhinaca midig ee Q2 ama bidixda Q1Haddii dhibicda P ay bidixda ka tahay Q1; garoon koronto oo ay soo saarto Q1 barta P waa bidix (ka fog Q)1) iyo garoon koronto oo ay soo saarto Q2 barta P ee dhanka midig (dhinaca Q1Jihada garoonka korontadu waa mid ka soo horjeeda si labada goobood ee korontadu ay isu baabi'iyaan si xoogga goobta korontadu ee barta P uu noqdo eber.
La yaqaan:
Q 1 = +9 μC = +9 x 10 −6 C
Q 2 = -4 μC = -4 x 10 −6 C
k = 9 x 10 9 Nm 2 C −2
Masaafada u dhaxaysa dallacaadda 1 iyo dallacaadda 2 = 3 cm
Masaafada u dhaxaysa Q 1 iyo barta P (r 1P ) = a
Masaafada u dhaxaysa Q 2 iyo barta P (r 2P ) = 3 + a
La Doonayo: goobta barta P si goobta korantada ee barta P ay eber u noqoto
Xalka:
Barta P waxay ku taal bidixda Q 1.
Goobta korantada ee ay soo saartay Q1 barta P:
Dakhligu waa togan yahay, Q1 -na waa togan yahay, sidaa darteed jihada garoon koronto ayaa u jeedda bidixda.
Goobta korantada ee ay soo saartay Q2 barta P:
Kharashka tijaabada waa togan yahay Q2 -na waa taban yahay si jihada gaaska korontada uu u socdo dhanka midig.
Garoon koronto oo saafi ah oo ku yaal barta A:
Isticmaal qaacidada labajibbaaran si aad u go'aamiso:
a = -1.25, b = -13.5, c = -20.25
Masaafada u dhaxaysa Q 2 iyo barta P (r 2P ) = 3 + a = 3 – 1.8 = 1.2 cm.
Barta P waxay ku taal 1.2 cm midig ee Q 1.
