8 mau laʻana o nā pilikia o ke au uila
1. Hele kahi uku uila o 1 Coulomb ma o kahi uea alakaʻi no 1 kekona. ʻO ka nui o ke au uila …..
Pahana
Ua ʻike ʻia:
Hoʻouka (Q) = 1 Coulomb
Ka manawa (t) = 1 kekona
Nīnau ʻia: Au uila
Pane:
ʻO I = Q / t = 1 / 1 = 1 Coulomb/kekona = 1 Ampere
2. Ke kahe nei ke au o 2 Amperes ma o kahi uea no 8 kekona. E hoʻoholo i ka nui o ka uku e hele ana ma o kahi kiko a me ka helu o nā electrons i loko o kēlā uku!
Pahana
Ua ʻike ʻia:
Au uila (I) = 1 Amperes
Ka manawa (t) = 2 kekona
Nīnau: ka hoʻouka (Q) a me ka helu o nā electrons (e)
Pane:
ʻO ke ʻano o ke au uila:
ʻO wau = Q/t
Wehewehe ʻana i ke ʻano hana: I = au uila, Q = uku uila, t = manawa
Uila uila:
Q = I t = (2 Ampere)(8 kekona) = 16 Coulombs.
ʻO ke kumukūʻai o hoʻokahi electron he 1,6 x 10 -19 Coulombs no laila ʻo ka uku o 16 Coulombs he nui nā electrons e like me 16 C / 1,6 x 10 -19 Coulombs = 10 x 10 19 electrons.
3. 10 mA = …… Ampere ?
Pahana
1 Ampere = 1000 milliAmperes
1 miliAmpere = 1/1000 Ampere
10 milliAmpere = 10/1000 Ampere = 1/100 Ampere = 1/10 2 Ampere = 10 -2 Ampere = 0,01 Ampere
4. E nānā i ke kiʻi!
– E hoʻoholo i ke kuhikuhi o ke au uila!
– E hoʻoholo i ke kuhikuhi o ka neʻe ʻana o ka electron!
Pahana
Neʻe ke au uila mai ka mana kiʻekiʻe a i ka mana haʻahaʻa. Ma muli o ke kiʻikuhi, ʻo ke kuhikuhi o ke au uila he ʻaoʻao ʻē aʻe.
ʻO ke kuhikuhi o ka neʻe ʻana o ka electron mai ka pou maikaʻi ʻole a i ka pou maikaʻi. Ma muli o ke kiʻi, ua like ia me ka ʻaoʻao o ka uaki.
5. Ke kahe nei ke au uila o 10 A ma o kahi alakaʻi no 2 mau minuke. ʻO ka nui o ka uku uila e kahe ana ma o ke alakaʻi he...
A. 5 Coulombs
B. 12 Coulombs
C. 20 Coulombs
D. 1200 Coulombs
Pahana
Ua ʻike ʻia:
Au uila (I) = 10 Amperes
Ka manawa (t) = 2 minuke = 2 x 60 kekona = 120 kekona
Nīnau: ʻEhia ka nui o ka uku uila e kahe ana i loko o ke alakaʻi?
Pane:
ʻO ke ʻano hana no ka ikaika o ke au uila:
ʻO wau = q/t
Wehewehe: I = au uila, q = hoʻouku uila, t = wā manawa
Uila uila:
q = I t = (10)(120) = 1200 Coulombs
ʻO D ka pane pololei.
6. Inā holo he 60 Coulombs o ka hoʻouku uila ma o kahi ʻāpana uea alakaʻi i loko o 5 mau minuke, a laila ʻo ke au uila ...
A. 0,2 Amperes
B. 0,5 Amperes
C. 3 Amperes
D. 6 Amperes
Pahana
Ua ʻike ʻia:
Ka manawa ma waena (t) = 5 minuke = 5 x 60 kekona = 300 kekona
Ka hoʻouku uila (Q) = 60 Coulombs
Nīnau: Ka ikaika o ke au uila (I)
Pane:
Ikaika o ke au uila:
ʻO wau = Q/t
I = 60 / 300
ʻO I = 0,2 Coulomb/kekona
ʻO I = 0,2 Amperes
Ua kapa ʻia ʻo Coulomb/kekona ʻo Ampere.
ʻO A ka pane pololei.
7. ʻO ke anakahi SI o ke au uila…
A. ampere
B. uila
C. coulomb
D. ohm
Pahana
ʻO Ampere ka ʻōnaehana honua o nā anakahi no ka nui kumu o ke au uila.
ʻO A ka pane pololei.
8. Hiki ke hōʻike ʻia ke au uila i hana ʻia e ka dynamo ma ke kiʻikuhi...
Pahana
Wehewehe kiʻi: I = au uila, t = wā manawa
Hoʻopuka ka dynamo i ke au pololei (DC), ʻoiai ʻo ka mea hana uila e hoʻopuka i ke au alternating (AC). Hōʻike ʻia ke kiʻikuhi o ke au pololei ma ka pane D, ʻoiai ua hōʻike ʻia ke kiʻikuhi o ke au alternating ma ka pane B.
ʻO D ka pane pololei.
