Ka ikaika electrostatic - nā pilikia a me nā hoʻonā
1. Inā ka ikaika uila paʻa he 144 N, he aha ka mamao ma waena o nā ʻelua ka uku… (1 µC = 10-6 C a me k = 9.109 Nm2.C-2)
ʻIke ʻia:
Ka ikaika uila (F12) = 144 N
Hoʻouka 1 (q1) = 10 μC = 10 x 10-6 C
Hoʻouka 2 (q2) = 4 μC = 4 x 10-6 C
Paʻa (k) = 9 m 109 Nm2.C-2
C = Coulomb, N = Newton, m = mika
Makemake ʻia: Ka mamao ma waena o nā uku ʻelua (r)
Lōlā:
ʻO ke kaulike o Kānāwai Coulomb :
F = ka ikaika uila paʻa, k = ʻO ke kūpaʻa o Coulomb, q = ka hoʻouku uila, r = ka mamao ma waena o nā hoʻouku ʻelua
Ka mamao ma waena o nā uku ʻelua (r) = 5 x 10-2 mika = 5 x 10-2 x 102 kenimika = 5 kenimika.
2. ʻElua mau uku i hoʻokaʻawale ʻia e kahi mamao o rInā he 3.6 N ka ikaika uila paʻa, he aha ka mamao ma waena o nā uku ʻelua (1 µC = 10-6 C a me k = 9.109 Nm2.C-2)
ʻIke ʻia:
Ka ikaika uila (F12) = 3.6 N
Hoʻouka 1 (q1) = 9 μC = 9 x 10-6 C
Hoʻouka 2 (q2) = 4 μC = 4 x 10-6 C
ʻO ke kūpaʻa o Coulomb (k) = 9 m 109 Nm2.C-2
C = Coulomb, N = Newton, m = mika
Makemake ʻia: Ka mamao ma waena o nā uku ʻelua (r)
Lōlā:
Ka mamao ma waena o nā uku ʻelua (r) = 0.3 m = 0.3 x 100 kenimika = 30 kenimika.
3. ʻEkolu mau kiko hoʻopiʻi e like me ka mea i hōʻike ʻia ma ke kiʻi ma lalo nei. He aha ka nui o ka ikaika uila paʻa ma ke kiko A (k = 9.109 Nm2.C-2; 1 μ = 10-6)
ʻIke ʻia:
kauoha ʻA (qA) = -2 μC = -2 x 10-6 C
kauoha B (qB) = 8 μC = 8 x 10-6 C
kauoha C (qC) = 4,5 μC = 4,5 x 10-6 C
ʻO Coulombka paʻa mau (k) = 9 m 109 Nm2.C-2
Ka mamao ma waena o nā uku A a me B (rAB) = 4 kenimika = 4 x 10-2 m
Ka mamao ma waena o nā uku A a me C (rAC) = 3 kenimika = 3 x 10-2 m
C = Coulomb, N = Newton, m = mika
Makemake ʻia: ʻO ka ikaika uila paʻa ma ke kiko A
Lōlā:
ʻO ke kaulike o ke kānāwai o Coulomb:
F= ka ikaika uila paʻa, k = ʻO Coulombka paʻa mau, q = uku uila, r = ka mamao ma waena o nā uku ʻelua
ʻO ka ikaika uila paʻa ma ke kiko A:
4. Nā uku ʻekolu-kiko e like me ka mea i hōʻike ʻia ma ke kiʻi ma lalo nei. He aha ka nui o ka ikaika Coulomb i ʻike ʻia e ka Uku B (k = 9.109 Nm2.C-2; 1 µC = 10-6 C).
ʻIke ʻia:
qA = 10 µC = 10 x 10-6 C = 10-5 ʻO Coulomb
qB = 10 µC = 10 x 10-6 = 10-5 ʻO Coulomb
qC = 20 µC = 20 x 10-6 = 2x10-5 ʻO Coulomb
rAB = 0.1 mika = 10-1 m
rBC = 0.1 mika = 10-1 m
k = 9 x 109 Nm2C-2
Makemake ʻia: Ka ikaika Coulomb i ʻike ʻia e Charge B
Lōlā:
Aia ʻelua mau mana coulomb e hana ana ma ka hoʻopiʻi B, ʻo ka mana Coulomb ma waena o nā hoʻopiʻi A a me B (FAB) a me ka ikaika Coulomb ma waena o nā uku B a me C (FBC). ʻO ka ikaika Coulomb i ʻike ʻia e ka hoʻopiʻi B ʻo ia ka ikaika net o FAB a me FBC.
Ka ikaika Coulomb ma waena o nā uku A a me B:
Ua kau inoa ʻo Uku A i ka maikaʻi a ua kau inoa ʻo Uku B i ka maikaʻi i hiki ai iā FAB nā helu e hoʻopiʻi ai iā C.
Ka ikaika Coulomb ma waena o nā uku B a me C:
Ua kau inoa ʻo Charge B i ka maikaʻi a ua kau inoa ʻo Charge C i ka maikaʻi i hiki ai iā FBC nā helu e hoʻopiʻi iā A.
Ka ikaika Coulomb i ʻike ʻia e ka hoʻopiʻi B:
FB =FBC - FAB = 180 – 90 = 90 N
Ka ikaika Coulomb i ʻike ʻia e ka hoʻopiʻi B (FB) he 90 Newtons. ʻO ke kuhikuhi o FB like me ke kuhikuhi o FBC nā helu e hoʻopiʻi iā A.
5E hoʻoholo i ka nui a me ke kuhikuhi o ka ikaika Coulomb ma ka uku B (k = 9 x 109 Nm2C-2, 1 μC = 10-6 C).
ʻIke ʻia:
kauoha ʻA (qA) = +Q
kauoha B (qB) = -2Q
kauoha C (qC) = -Q
Ka mamao ma waena o nā uku A a me B (rAB) = r
Ka mamao ma waena o nā uku B a me C (rBC) = 2r
k = 9 x 109 Nm2C-2
Makemake ʻia: Ka nui a me ke kuhikuhi o ka ikaika Coulomb ma ka hoʻopiʻi B
Lōlā:
Ka ikaika Coulomb ma waena o nā uku A a me B:
He maikaʻi ke kumukūʻai A a he maikaʻi ʻole ke kumukūʻai B no laila ʻo ia ke kuhikuhi o FAB nā helu e hoʻopiʻi iā A.
Ka ikaika Coulomb ma waena o ka uku B a me ka uku C:
He maikaʻi ʻole ka hoʻopiʻi B a he maikaʻi ʻole ka hoʻopiʻi C no laila ʻo ia ke kuhikuhi o F.BC nā helu e hoʻopiʻi iā A.
Hana ikaika ʻupena ma ka hoʻopiʻi B:
F = FAB +FBC = 2 k Q2/r2 + 0.5 k Q2/r2 = 2.5 k Q2/r2 = 2.5 k Q2 r-2
E kuhikuhi ana ke kuhikuhi o ka ikaika i ka hoʻouka kaua A a i ʻole i ka hema.
