Laʻana o ke kahe uila

4 mau laʻana o nā pilikia flux uila

1. Kahua uila o 8000 N/C i kū pololei i kahi ʻili huinahā me ka ʻili o 10 m²E hoʻoholo kahe uila e hele ana ma waena o ka ʻili huinahā!
Pahana
Ua ʻike ʻia:
Kahua uila (E) = 8000 N/C
ʻĀpana ʻili (A) = 10 m²
θ = 0^o (kūlike nā laina kahua uila me nā laina maʻamau)
Ua nīnau ʻia: Kahe uila (Φ)
Pane:

ʻO ke ʻano o ka loli uila:

Φ = EA cos θ
ʻO ka wehewehe ʻana: Φ = kahe uila (Nm)²/C), E = kahua uila (N/C), A = ʻilikai (m²), θ = ke kihi ma waena o ka laina kahua uila a me ka laina maʻamau (ka laina kū pololei i ka ʻili).

Ka nui o ke kahe uila:

Φ = EA cos θ = (8000)(10)(cos 0) = (8000)(10)(1) = 80.000 = 8 x 10 ⁴ Nm ² /C

2. Hele kahi kahua uila o 5000 N/C ma o kahi ʻili huinahā a hana i kahi kihi o 60^o i ka laina maʻamau. ʻO ka ʻili o ka huinahā he 2 m²E hoʻoholo i ke kahe uila ma o ka ʻili huinahā!
Pahana
Ua ʻike ʻia:
Kahua uila (E) = 5000 N/C
ʻĀpana ʻili (A) = 2 m²
θ = 60^o
Ua nīnau ʻia: Kahe uila (Φ)
Pane:
Kahe uila:
Φ = EA cos θ = (5000)(2)(cos 60) = (5000)(2)(0,5) = 5000 = 5 x 10³ Nm²/C

3. Hele kahi kahua uila o 4000 N/C ma waena o ka ʻili o kahi poloka e like me ka mea i hōʻike ʻia ma ke kiʻi ma lalo nei. He 2 mika ka lōʻihi o ka poloka, 1 mika ka laulā, a he 1 mika ke kiʻekiʻe. E hoʻoholo i ka flux uila e hele ana ma waena o ka poloka!
Pahana
Ua ʻike ʻia:
Kahua uila (E) = 5000 N/C
ʻĀpana ʻili (A) = 2 m²
Ua nīnau ʻia: Kahe uila (Φ)
Pane:

Ka holo ʻana o ka uila ma o ka poloka

Ma muli o ke kiʻi, ua kū pololei nā laina kahua uila i kala ʻulaʻula i ka ʻili o ka poloka i kūlike lākou me ka laina maʻamau (e hana ana i kahi kihi o 0 ^o ), ʻoiai ua like nā laina kahua uila ʻē aʻe me ka ʻili i kūlike lākou i ka laina maʻamau (e hana ana i kahi kihi o 90 ^o ).

Komo nā laina kahua uila ʻulaʻula i loko o ka poloka akā neʻe i waho mai ia mea. Ke neʻe nā laina kahua uila i loko o ka poloka, me he mea lā he uku maikaʻi ʻole i loko o ka poloka, no laila he maikaʻi ʻole ke kahe uila. I ka ʻaoʻao ʻē aʻe, ke neʻe nā laina kahua uila i waho mai ka poloka, me he mea lā he uku maikaʻi i loko o ka poloka, no laila he maikaʻi ke kahe uila. ʻO nā laina kahua uila e komo ana i ka poloka ua like ia me nā laina kahua uila e haʻalele ana i ka poloka, no laila ʻo ka flux uila hopena he ʻole.

4. He 0,5 mika ka radius o ka pōpō a ma ke kikowaena o ka pōpō aia kahi uku uila o 10 μC. E hoʻoholo i ke kahe uila ma o ka pōpō!
Pahana
Ua ʻike ʻia:
ʻO ke anawaena o ka pōpō (r) = 0,5 mika
Uku uila (Q) = 10 μC = 10 x 10^-6 C
Ua nīnau ʻia: Kahe uila (Φ)
Pane:

Kahua uila:

E = kq/r²
E = (9 x 10⁹ Nm²/C²)(10 x 10^-6 C) / 0,5²
E = (90 x 10³) / 0,25
E = 360 x 10³
E = 3,60 x 10⁵ N / C

ʻĀpana ʻili o ka poepoe:

A = 4 π r ² = 4 (3,14)(0,5) ² = (12,56)(0,25) = 3,14 m ²

Kahe uila:

Kū pololei nā laina kahua uila i ka ʻili a kūlike me ka laina maʻamau i hiki ai ke kihi i hoʻokumu ʻia he 0.^o.
Φ = EA cos θ
Φ = (3,60 x 10⁵)(3,14)(cos 0)
Φ = (11,304 x 10⁵)(1)
Φ = 11,304 x 10⁵
Φ = 1,13 x 10⁶ Nm²/C