Isibonelo Samandla Kagesi

Izibonelo ezi-5 zemibuzo engaba khona kagesi

1. Nquma amandla kagesi endaweni eyi-1 cm ukusuka ekushajeni q = 5,0 μC. I-constant kaCoulomb (k) = 9 x 10⁹ Nm²C^-2, 1 μC = 10^-6 C.
Ingxoxo
Kuyaziwa ukuthi:
Ibanga ukusuka ekushajeni (r) = 1 cm = 1/100 m = 0,01 m = 10^-2 m
Ishaja (q) = 5,0 μC = 5,0 x 10^-6 I-Coulomb
Kubuziwe: Amandla kagesi (V)
Impendulo:

Amandla kagesi:

Amandla kagesi angama-4,5 x 10⁶ I-Volt

2. Ishaja Q₁ = 5,0 μC kanye nokushaja Q₂ = 6,0 μC. I-constant kaCoulomb (k) = 9 x 10⁹ Nm²C^-2, 1 μC = 10^-6 Iphuzu A liphakathi kwamabili impahlaThola amandla kagesi endaweni A!
Ingxoxo
Kuyaziwa ukuthi:
Ishaja Q₁ = -5,0 μC = -5,0 x 10^-6 C
Ibanga lephuzu A kusuka ku-Q₁ = 10 cm = 0,1 m = 10^-1 m
Ishaja Q₂ = 6,0 μC = 6,0 x 10^-6 C
Ibanga lephuzu A kusuka ku-Q₂ = 10 cm = 0,1 m = 10^-1 m
I-Coulomb's njalo (k) = 9 x 10⁹ Nm²C^-2
Kubuziwe: Amandla kagesi endaweni A
Impendulo:

Amandla kagesi 1:

Amandla kagesi 2:

Amandla kagesi endaweni A:

V = V₂ - V₁
V = (54 – 45) x 10⁴
V = 9 x 10⁴
Amandla kagesi endaweni A angama-9 x 10⁴ I-Volt

3. Ishaja q₁ = 5,0 μC kanye nokushaja q₂ = 6,0 μC. I-constant kaCoulomb (k) = 9 x 10⁹ Nm²C^-2, 1 μC = 10^-6 C. Thola amandla kagesi endaweni A!
Ingxoxo
Kuyaziwa ukuthi:
Ishaja Q₁ = -5,0 μC = -5,0 x 10^-6 C
Ibanga lephuzu A kusuka ku-Q₁ = 40 cm = 0,4 m = 4 x 10^-1 m
Ishaja Q₂ = 6,0 μC = 6,0 x 10^-6 C
Ibanga lephuzu A kusuka ku-Q₂ = 50 cm = 0,5 m = 5 x 10^-1 m
I-coulomb's constant (k) = 9 x 10⁹ Nm²C^-2
Kubuziwe: Amandla kagesi endaweni A
Impendulo:

Amandla kagesi 1:

Amandla kagesi 2:

Amandla kagesi endaweni A:

V = V₁ +V₂
V = (-11,25 + 10,8) x 10⁴
V = -0,45 x 10⁴
V = -4,5 x 10³
Amandla kagesi endaweni A angu--4,5 x 10³ I-Volt

4. Imibuzo Yokuhlolwa Kazwelonke ye-SMA/MA Physics U-ZC-2013/2014 No. 28
I-hollow conduction sphere ishajwa ngeshaja kagesi enhle engu-500 µC njengoba kuboniswe esithombeni esilandelayo:
Yisiphi isitatimende esilandelayo esilungile?
A. Amandla kagesi endaweni P = amandla kagesi aphindwe kabili endaweni R
B. Amandla kagesi endaweni ethi Q afana nawasendaweni ethi P.
C. Amandla kagesi endaweni ethi T = amandla kagesi aphindwe kabili endaweni ethi Q
D. Amandla kagesi endaweni P afana nalawo akhona endaweni T.
E. Amandla kagesi ezindaweni P, Q, kanye no-R ayafana.
Ingxoxo
Ngakho-ke, i-hollow containing sphere ayikho ishaja kagesi ngaphakathi kwe-sphere. Ngokusho kwe- ukusetshenziswa komthetho kaGauss, uma kungekho ukushaja kukagesi endaweni engenalutho khona-ke akukho nsimu kagesi endaweni engenalutho.

Insimu kagesi inobudlelwano nomehluko emandleni kagesi ovezwa ngesibalo V_ab = Ed, lapho u-V_ab = umehluko ongaba khona phakathi kwamaphuzu amabili, u-E = insimu kagesi kanye no-d = ibanga phakathi kwamaphuzu amabili. U-E = 0 ngakho u-Vab = 0. Insimu kagesi ingu-zero ngakho umehluko ongaba khona ungu-zero. Umehluko ongaba khona ongu-zero usho ukuthi akukho mehluko kumandla kagesi ngaphakathi kwe-hollow sphere. Ngamanye amazwi, amandla kagesi kuzo zonke izindawo ngaphakathi kwe-hollow sphere ayafana. Ubukhulu bamandla kagesi ngaphakathi kwe-hollow sphere bufana namandla kagesi ebusweni be-sphere.

Uma kude kakhulu nobuso bembulunga, amandla kagesi ayancipha kuleyo ndawo. Lokhu kusekelwe esilinganisweni somehluko wamandla kagesi. V_ab = k Q/r, Lapho r = ibanga ukusuka enkabeni yebhola kuya endaweni lapho kubalwa khona umehluko ongaba khonaNgokusekelwe kulesi sibalo, ibanga (r) lilingana ngokuphambene nomehluko ongaba khona (V)._ab), ngakho-ke uma ibanga lephuzu likhula ukusuka enkabeni yebhola, kulapho umehluko wamandla kagesi phakathi kwenkaba yebhola nalelo phuzu lincane. Iphuzu R liseduze nenkaba yebhola kuyilapho iphuzu T likude nenkaba yebhola, ngakho umehluko wamandla phakathi kwephuzu R kanye nenkaba yebhola mkhulu, kuyilapho umehluko wamandla kagesi phakathi kwephuzu T kanye nenkaba yebhola mncane. Ngamanye amazwi, amandla kagesi endaweni R mkhulu kunemandla kagesi endaweni T.

Qaphela: Hlukanisa phakathi amandla kagesi Dengan umehluko wamandla kagesi. Amandla kagesi ayikwazi ukubalwa ngenani, kanti umehluko wamandla kagesi ungabalwa ngenani kusetshenziswa ifomula V_ab = k Q/rUma kukhona insimu kagesi esikhaleni, khona-ke iphuzu ngalinye esikhaleni linamandla kagesi, kuyilapho umehluko wamandla kagesi ubalwa ngokuqhathanisa amaphuzu amabili ahlukene. Ngamanye amazwi, endaweni efanayo kukhona amandla kagesi kodwa akukho mehluko wamandla kagesi kuleyo ndawo.

Izimpendulo ezifanele ngu-B no-E.

5. Imibuzo Yokuhlolwa Kazwelonke ye-SMA/MA Physics U-ZC-2013/2014 No. 28
I-hollow conduction sphere inomshaja ongu-4 µC kanye ne-radius engu-10 cm njengoba kuboniswe esithombeni. Yisiphi isitatimende mayelana namandla kagesi (V) kule sphere esinembile?
A. V_A > V_B
B. V_B > V_A
C. V_A =V_B
D.V_A <V_C
E.V_B <V_C
Ingxoxo
Ngokusekelwe encazelweni embuzweni nombolo 1, V_A =V_B, V_A > V_C kanye no-V_B > V_C.
Impendulo efanele ngu-C.