10 mau laʻana o nā nīnau hoʻokomo uila EMF Induction
1. Loaʻa i kahi mīkini hana kahi wili me ka nui o nā huli N a me kahi ʻāpana keʻa A. Aia ke wili i loko o kahi kahua magnetic B, a laila hoʻohuli ʻia ma ka wikiwiki angular ω i hiki ai ke hana ʻia kahi EMF i hoʻokomo ʻia kiʻekiʻe loa o 50 volts. Inā loli ke kahua magnetic i 1/2 o kona waiwai mua a loli kona wikiwiki angular i 4 mau manawa o kona waiwai mua, a laila ʻo ka EMF i hoʻokomo ʻia kiʻekiʻe loa...
A. 25 volts
B. 50 volts
C. 100 volts
D. 200 volts
E. 250 volts
Pahana
Ua ʻike ʻia:
Helu o nā huli 1 (N 1 ) = N
ʻĀpana ʻāpana kea 1 (A 1 ) = A
Kahua makeneka 1 (B 1 ) = B
Ka wikiwiki kihi 1 (ω 1 ) = ω
ʻO ka EMF i hoʻokomo ʻia kiʻekiʻe loa 1 (ε 1 ) = 50 Volts
Kahua Magnetic 2 (B 2 ) = 0,5B = 0,5(1) = 0,5
ʻO ka wikiwiki o ka huina 2 (ω 2 ) = 4ω = 4(1) = 4
Nīnau: ʻO ka EMF i hoʻokomo ʻia kiʻekiʻe loa he 2 (ε 2 )
Pane:
Ka hoʻohālikelike EMF i hoʻoulu ʻia kiʻekiʻe loa:
ε max = NBA ω
ʻIkepili:
ʻO ε max = ka emf i hoʻokomo ʻia kiʻekiʻe loa, N = ka helu o nā huli, B = kahua magnetic, A = ka ʻāpana ʻāpana, ω = ka wikiwiki angular
EMF 1 (ε 1 ):
ε max = NBA ω
Inā ʻo ω = 1 a ʻo B = 1 a laila
50 = N (1) A (1)
50 = ʻAʻole
EMF 2 (ε 2 ):
ε max = NBA ω
NA = 50, B = 0,5, ω = 4
ʻO ka nui loa o ε = (50)(0,5)(4)
ε max = 100
ʻO C ka pane pololei.
2. I mea e like ai ka EMF kiʻekiʻe loa i hana ʻia e ka mīkini hana me ka hapa o ke kumu, ʻo ka nui e pono e hoʻololi ʻia ma muli o ka ʻōlelo ma lalo nei...
A. Ua pāpālua ʻia ka wikiwiki kihi a me ka helu o nā huli
B. Ua pāpālua ʻia ka hoʻokomo magnetic a me kona alapine (frequency).
C. Ua pāpālua ʻia ka ʻāpana ʻāpana a ua pāpālua ʻia ka wā
D. Hana ʻia ka helu o nā huli a me ka wā i 4 manawa o ka mea mua.
E. Ua pāpālua ʻia ke alapine (frequency) a me ka wā.
Pahana
Ka hoʻohālikelike EMF i hoʻoulu ʻia kiʻekiʻe loa:
ε max = NBA ω
ʻIkepili:
ʻO ε max = ka emf i hoʻokomo ʻia kiʻekiʻe loa, N = ka helu o nā huli, B = kahua magnetic, A = ka ʻāpana ʻāpana, ω = ka wikiwiki angular
Inā N = 1, B = 1, A = 1, ω = 1 a laila ε max = NBA ω = (1)(1)(1)(1) = 1
A. Ua pāpālua ʻia ka wikiwiki kihi (ω) a me ka helu o nā huli (N)
ε max = NBA ω
ʻO ka nui loa o ε = (2)(1)(1)(2)
ε max = 4
B. Ua pāpālua ʻia ka hoʻokomo magnetic (B) a me kona alapine (f).
ʻO ke ʻano hana no ka wikiwiki angular (ω) = 2πf. Hoʻohālikelike pololei ʻia ke alapine (frequency) no laila inā pāpālua ʻia ke alapine (f) , e pāpālua ʻia ka wikiwiki angular (ω).
ε max = NBA ω
ʻO ka nui loa o ε = (1)(2)(1)(2)
ε max = 4
C. Ua pāpālua ʻia ka ʻāpana ʻāpana (A) a ʻo ka wā he 4 manawa o ka mua
ʻO ke ʻano hana no ka wikiwiki kihi (ω) = 2πf = 2π/T. He kūlike ʻole ka wā i hiki ai inā lilo ka wā i 4 manawa o ka mua a laila lilo ka wikiwiki kihi i 1/4 manawa o ka mua.
ε max = NBA ω
ʻO ka nui loa o ε = (1)(1)(2)(1/4) = 2/4
ε max = 1/2
D. Ua hoʻonui ʻia ka helu o nā huli (N) a me ka wā (T) i 4 mau manawa
ʻO ke ʻano hana no ka wikiwiki kihi (ω) = 2πf = 2π/T. He kūlike ʻole ka wā i hiki ai inā lilo ka wā i 4 manawa o ka mua a laila lilo ka wikiwiki kihi i 1/4 manawa o ka mua.
ε max = NBA ω
ʻO ka nui loa o ε = (4)(1)(1)(1/4) = 4/4
ε max = 1
E. Ua pāpālua ʻia ke alapine (f) a me ka wā (T).
Ua like ke alapine (frequency) me ka hoʻohālikelike pololei ʻana , no laila, inā pāpālua ʻia ke alapine (f), a laila pāpālua ka wikiwiki angular (ω). Ua like ke au me ka hoʻohālikelike ʻē aʻe, no laila, inā pāpālua ʻia ke au, a laila lilo ka wikiwiki angular i 1/2 o ka mua. ʻO ka hopena hope loa, ua mau ka wikiwiki angular.
ε max = NBA ω
ʻO ka nui loa o ε = (1)(1)(1)(1)
ε max = 1
ʻO C ka pane pololei.
3. Piʻi ka flux magnetic i loko o kahi coil me 1.000 mau huli mai 0,03 Wb a i 0,04 Wb i loko o 0,2 kekona i hiki ai i ka waiwai EMF hopena ke E1 . Inā ʻike ka coil like i kahi loli i ka flux magnetic mai 0,02 Wb a i 0,04 Wb i loko o 0,1 kekona, ʻo ka waiwai EMF i hoʻokomo ʻia ka hopena ʻo E2 . ʻO ka lakio o E1 a me E2 he …
A. 1 : 1
B. 1 : 2
K. 1 : 4
D. 2 : 1
E. 4 : 1
Pahana
Ua ʻike ʻia:
Helu o nā huli (N) = 1000
Hoʻololi Flux 1 ( Δφ 1 ) = 0,04 Wb – 0,03 Wb = 0,01 Wb
Ka manawa manawa 1 (Δt 1 ) = 0,2 kekona
EMF i hoʻokomo ʻia 1 = E 1
Hoʻololi Flux 2 ( Δφ 1 ) = 0,04 Wb – 0,02 Wb = 0,02 Wb
Ka manawa manawa 2 (Δt 2 ) = 0,1 kekona
EMF i hoʻokomo ʻia 2 = E 2
Nīnau ʻia: E 1 : E 2
Pane:
Hoʻohālikelike ʻana o E 1 a me E 2 :
E 1 : E 2
50: 200
1: 4
ʻO C ka pane pololei.
4. Hoʻokomo kahi wili i loko o kahi kahua magnetic homogeneous perpendicularly, e hana ana i kahi EMF i hoʻokomo ʻia. Inā hoʻololi ʻia ke wili me kahi wili ʻē aʻe me ka pālua o ka helu o nā huli o ke wili mua a mau ka wikiwiki o ka loli flux, a laila ʻo ka lakio o ka EMF i hoʻokomo mua ʻia a me ka hope loa he...
A. 1 : 1
B. 1 : 2
K. 2 : 1
D. 3 : 1
E. 3 : 2
Pahana
Ua ʻike ʻia :
Ka helu mua o nā huli (N) = 1
Ka helu hope loa o nā huli (N) = 2
Ka helu hoʻololi mua o ka flux (ΔØ)B / Δt) = ka helu hoʻololi flux hope loa (ΔØB /Δt)
Ua nīnau ʻia Hoʻohālikelike o ka EMF i hoʻokomo mua ʻia a me ka hope
Pane :
ʻO ke kānāwai o Faraday no ka hoʻokomo ʻana :
E = -N (ΔØB /Δt)
Wehewehe: E = emf i hoʻokomo ʻia, N = helu o nā huli, ΔØB / Δt = ka wikiwiki o ka loli o ke kahe
Hoʻohālikelike o ka EMF i hoʻokomo mua ʻia a me ka hope :
Hoʻomaka E : Hoʻopau E
-N (ΔØB / Δt) : -N (ΔØB /Δt)
1: 2
ʻO ka pane pololei ʻo B.
5. Ma ke kūlana mua (1), loli ka flux magnetic ma 5 Wb i 2 kekona i loko o kahi coil me 20 mau huli. Ma ke kūlana (2), lawe ka loli flux like i 8 kekona. ʻO ka lakio o ka EMF i hoʻokomo ʻia i nā kūlana (1) a me (2) ʻo…
A. 1 : 1
B. 2 : 1
K. 3 : 1
D. 4 : 1
E. 4 : 3
Pahana
Ua ʻike ʻia :
Ka nui o ka loli o ke kahe (ΔØ)B / Δt) mua = 5/2
Ka nui o ka loli o ke kahe (ΔØ)B / Δt) hopena = 5/8
Helu o nā huli (N) = 20
Ua nīnau ʻia Hoʻohālikelike o ka EMF i hoʻokomo mua ʻia a me ka hope
Pane :
Hoʻomaka E : Hoʻopau E
-N (ΔØB / Δt) : -N (ΔØB /Δt)
20 (5/2) : 20 (5/8)
5/2: 5/8
1/1 : 1/4
4: 1
ʻO D ka pane pololei.
6. He 200 mau huli ka flux magnetic o ke coil mua a loli ia e 0,06 Wb i loko o 0,4 s. I loko o ke coil ʻelua, loli ka flux magnetic e 0,08 Wb i loko o 0,2 s. Inā pani ʻia ka helu o nā huli i loko o ke coil ʻelua e ka hapalua o ka helu o nā huli i loko o ke coil mua, a laila ʻo ka lakio o ka emf i hoʻokomo ʻia i loko o nā coil mua a me ka lua he...
A. 2 : 3
B. 3 : 1
K. 3 : 4
D. 3 : 5
E. 3 : 8
Pahana
Ua ʻike ʻia :
Ka nui o ka loli o ke kahe (ΔØ)B / Δt) mua = 0,06/0,4
Ka helu mua o nā huli (N) = 200
Ka nui o ka loli o ke kahe (ΔØ)B / Δt) hopena = 0,08/0,2
Ka helu hope loa o nā huli (N) = 100
Ua nīnau ʻia Hoʻohālikelike o ka EMF i hoʻokomo mua ʻia a me ka hope
Pane :
Hoʻomaka E : Hoʻopau E
-N (ΔØB / Δt) : -N (ΔØB /Δt)
200 (0,06/0,4) : 100 (0,08/0,2)
2 (0,15) : 1 (0,4)
0,3: 0,4
3: 4
7. Ma waena o nā kumu aʻe:
(1) Helu o nā huli ʻōwili
(2) Ka wikiwiki o ka loli o ke kahe magnetic
(3) Ke kuhikuhi o ke kahua makeneka
ʻO ka mea e hoʻonui ai i ka EMF i hoʻokomo ʻia ....
A. (1), (2), a me (3)
B. (1) a me (2) wale nō
C. (1) a me (3) wale nō
D. (1) wale nō
E. (2) wale nō
Pahana
ʻO EMF ke kū nei no ka Electromotive Force. ʻO ia hoʻi, ʻo EMF ke kumu o ke au uila, e like me ka pila, a pēlā aku. Ma muli o nā hoʻokolohua i hana ʻia e Faraday, ua ʻike ʻia ʻoiai ʻaʻole hiki i kahi kahua magnetic mau ke hana i kahi au uila, hiki i kahi kahua magnetic e loli nei ke hana i kahi au uila. ʻO kēia au uila hopena ua kapa ʻia ʻo ia he au induced.
Hiki ke hoʻoholo ʻia nā kumu e hoʻohuli i ka EMF i hoʻokomo ʻia me ka hoʻohana ʻana i ke kānāwai o Faraday no ka induction, kahi i hōʻike ʻia ma ka makemakika e ke ʻano:
Ua wehewehe ka hōʻailona maikaʻi ʻole ma ke ʻano ma luna nei ʻo ke kuhikuhi o ke kahua magnetic i hana ʻia e ke au i hoʻokomo ʻia e kūʻē mau ana i ke kuhikuhi o ke kahua magnetic e hana ana i ke au i hoʻokomo ʻia.
ʻIkepili:
N = ka helu o nā huli ʻōwili, B = kahua makeneti, A = ka ʻili o ka loop, θ = ke kihi ma waena o ke kahua makeneti (B) a me ka laina kū pololei i ka ʻili o ka coil (A).
Inā kū pololei ʻo B i ka ʻili o ke koʻi a laila θ = 0 o i hiki ai iā Φ B = BA cos 0 o = BA (1) = B A.
Inā kūlike ʻo B me ka ʻili o ke wili a laila θ = 90 o i hiki ai iā Φ B = BA cos 9 0 o = BA (0) = 0.
Ma muli o ke ʻano ma luna, ua hoʻoholo ʻia ʻo ka mea e hoʻonui ai i ka EMF i hoʻokomo ʻia ʻo ia ka helu o nā huli coil (N), ka wikiwiki o ka loli o ka flux magnetic a me ke kuhikuhi o ke kahua magnetic (θ ).
ʻO A ka pane pololei.
8. Ma waena o nā kumu aʻe:
(1) ka helu o nā huli ʻōwili
(2) ka wikiwiki o ka loli o ke kahe magnetic
(3) nā mea pale o waho
ʻO ka mea e hoʻopilikia ai i ka EMF i hoʻokomo ʻia i loko o ka coil ....
A. (1) a me (3)
B. (1) a me (2)
C. (2) wale nō
D. (2) a me (3)
E. (3) wale nō
Pahana
ʻO ka pane pololei ʻo B.
9. E nānā i ke kiʻi ma lalo nei! Inā holo ke au uila I ma o ke kaula AB, a laila ʻo ke kuhikuhi o ka ikaika magnetic i ʻike ʻia e ke kaula AB ʻo ia...
A. I ke kuhikuhi ʻana iā B
B. Ma ka hema
C. Ma ka ʻākau
D. Kūlike i ka mokulele o ka pepa
E. Kūlike i ka mokulele o ka pepa
Pahana
Ua ʻike ʻia :
Ke kuhikuhi o ke au uila = A a i B (i lalo)
Ke kuhikuhi o ke kahua makeneti = ka pou ʻākau a i ka pou hema o ka makeneti (i ka ʻākau)
Ua nīnau ʻia : Ke kuhikuhi o ka ikaika makeneka
Pane :
Rula lima ʻākau
E hoʻolōʻihi i kou lima ʻākau, e hoʻopololei i kou manamana nui, a pani i kou mau manamana lima ʻehā ʻē aʻe. E hoʻonohonoho i kou mau manamana lima ʻehā i kuhikuhi lākou i ke kuhikuhi o ke kahua magnetic (B). a hiki Hōʻike ka manamana nui i ke kuhikuhi o ka neʻe ʻana o ka uku (v). Inā maikaʻi ka uku uila, e kū pono ana ka poho lima o ka lima ʻākau i ke kuhikuhi o ka ikaika magnetic (F). Inā maikaʻi ʻole ka uku, e kū pono ana ke kua o ka lima ʻākau i ke kuhikuhi o ka ikaika magnetic (F).
ʻO ke kuhikuhi o ke au uila maʻamau, e like me ka pilikia ma luna, ua like ia me ke kuhikuhi o kahi uku uila maikaʻi. Ke hoʻopili nei i ka lula lima ʻākau, ʻo ke kuhikuhi o ka ikaika magnetic e kū pololei ana i ka mokulele o ka pepa, a i ʻole i ka maka o ka mea heluhelu.
ʻO ka pane pololei ʻo E.
10. Ua kau ʻia kahi uea pololei e lawe ana i ke au I ma waena o ʻelua mau pou magnetic e like me ka mea i hōʻike ʻia ma ke kiʻi. ʻO ke kuhikuhi o ka ikaika magnetic ma luna o ke uea aia ma ke kuhikuhi like me ka...
A. Axis-z maikaʻi
B. Axis-z maikaʻi ʻole
C. Axis-y maikaʻi
D. Axis-y maikaʻi ʻole
E. Axis-x maikaʻi
Pahana
Ua ʻike ʻia :
Ke kuhikuhi o ke au uila = i ka hema
Ke kuhikuhi o ke kahua makeneka = ʻākau a hema (i luna)
Ua nīnau ʻia : Ke kuhikuhi o ka ikaika makeneka
Pane :
Inā hoʻopili ʻia ka lula lima ʻākau, ua kū pololei ke kuhikuhi o ka ikaika magnetic i ka mokulele o ka pepa a i ʻole ma kahi ʻē aʻe mai ka maka o ka mea heluhelu a i ʻole ma ke kuhikuhi o ke axis z maikaʻi ʻole.
ʻO ka pane pololei ʻo B.
Puna nīnau:
Nā Nīnau Hoʻokolohua Lahui no ke Kino no ke Kula Kiʻekiʻe/Kula Kiʻekiʻe ʻOihana
