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.
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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 10 ⁶ Volts

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!
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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.
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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 ihlobene nomehluko wamandla kagesi ovezwa ngesibalo V _ab = E d , lapho V _ab = umehluko wamandla kagesi phakathi kwamaphuzu amabili, E = insimu kagesi kanye no d = ibanga phakathi kwamaphuzu amabili. E = 0 ngakho Vab = 0. Insimu kagesi ingu-zero ngakho umehluko wamandla kagesi ungu-zero. Umehluko wamandla kagesi ongu-zero usho ukuthi akukho mehluko wamandla kagesi ngaphakathi kwe-hollow sphere. Ngamanye amazwi, amandla kagesi awo wonke amaphuzu ngaphakathi kwe-hollow sphere ayafana. Ubukhulu bamandla kagesi ngaphakathi kwe-hollow sphere bufana namandla kagesi ebusweni be-sphere.

Uma uqhelelene nobuso bebhola, amandla kagesi amancane kulelo phuzu. Lokhu kusekelwe ku-equation yomehluko wamandla kagesi V _ab = k Q / r , lapho u-r = ibanga ukusuka enkabeni yebhola kuya endaweni lapho umehluko wamandla ubalwa khona . Ngokusekelwe kulesi sibalo, ibanga (r) lilingana ngokuphambene nomehluko wamandla (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 liqhelelene nenkaba yebhola, ngakho-ke umehluko wamandla kagesi phakathi kwephuzu R kanye nenkaba yebhola mkhulu, kuyilapho umehluko wamandla kagesi phakathi kwephuzu T kanye nenkaba yebhola uncane. Ngamanye amazwi, amandla kagesi endaweni R mkhulu kune-electric potential endaweni T.

Qaphela: Hlukanisa phakathi komehluko we-electrical potential kanye ne-electrical potential . I-electrical potential ayikwazi ukubalwa, kuyilapho umehluko we-electrical potential ungabalwa kusetshenziswa ifomula ethi V _ab = k Q / r . Uma kukhona insimu kagesi esikhaleni, khona-ke iphuzu ngalinye esikhaleni linamandla kagesi, kuyilapho umehluko we-electrical potential ubalwa ngokuqhathanisa amaphuzu amabili ahlukene. Ngamanye amazwi, endaweni efanayo kukhona amandla kagesi kodwa akukho mehluko we-electrical potential 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
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Ngokusekelwe encazelweni embuzweni nombolo 1, V_A =V_B, V_A > V_C kanye no-V_B > V_C.
Impendulo efanele ngu-C.