6 mau laʻana o nā nīnau kaapuni uila o kēia manawa
1. E nānā i ke kiʻi kaapuni RLC ma lalo nei! Inā he 250 Ω ka impedance o ke kaapuni, a laila ʻo ke kū'ē o ke resistor (R) he…..
A. 50 Ω
B. 200 Ω
C. 400 Ω
D. 600 Ω
E. 800 Ω
Pahana
Laʻana o nā nīnau hoʻokomo Electromagnetic EMF
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
22 mau laʻana o nā nīnau no ka hoʻokomo ʻana i ka Magnetic a me ka ikaika Magnetic
22 mau laʻana o nā nīnau no ka hoʻokomo ʻana i ka Magnetic a me ka ikaika Magnetic
1. E nānā i ke kiʻi ma ka ʻaoʻao!
ʻO ke kūlana o ke kaula ʻekolu a me ke kuhikuhi o ke au i ʻole e ʻike ka kaula ʻekolu i ka ikaika magnetic i ana ʻia mai ka kaula mua...
A. 9 kenimika ke kuhikuhi o ke au i luna
B. 6 kenimika ke kuhikuhi o ke au i luna
C. 6 kenimika ke kuhikuhi o ke au i lalo
D. 3 kenimika ke kuhikuhi o ke au i luna
E. 3 kenimika ke kuhikuhi o ke au i lalo
Pahana
Laʻana o kahi Kaapuni Uila Au Pololei
9 mau laʻana o nā nīnau kaapuni uila o kēia au pololei
1. E nānā i ke kiʻi hoʻonohonoho resistor ma lalo! ʻO ka nui o ke au ma o R 1 …
A. 2,0 Amperes
B. 2,5 Amperes
C. 4,0 Amperes
D. 4,5 Amperes
E. 5,0 Ampere
Pahana
Ua ʻike ʻia :
Palekana 1 (R1) = 4 Ω
Palekana 2 (R2) = 4 Ω
Palekana 3 (R3) = 8 Ω
Ka uila uila (V) = 40 Volts
Ua nīnau ʻia : Au ma o R1
Pane :
Nā nīnau hoʻohālike ma nā Nalu Mālamalama
11 mau laʻana o nā nalu māmā
1. ʻO ke kuʻi ʻana o ka diffraction
E hoʻolohe i nā ʻōlelo aʻe:
(1) E hoʻololi i ka grid me kahi grid me ka nui o nā laina no ka millimeter.
(2) Mālamalama e hāʻule ana mai ka uliuli a i ka melemele
(3) E hoʻololi i ke kukui i hoʻopuka ʻia mai ka ʻulaʻula a i ka ʻōmaʻomaʻo
(4) E hoʻoneʻe i ka pale a kokoke i ka grid
ʻO ka mea i hoʻokomo ʻia i ka hoʻoikaika ʻana e hoʻonui i ka laulā o ke kāʻei ʻālohilohi i ka hoʻokolohua diffraction grating ʻo ia...
Pahana
Nā nīnau hoʻohālike e pili ana i nā nalu mechanical
13 mau laʻana o nā nalu mīkini
1. ʻOkoʻa pae o nā nalu transverse
E nānā i ke kiʻi nalu sinusoidal ma lalo nei !
Inā he 80 kenimika ka lōʻihi o ka nalu o ka sinusoid ma luna, a laila ʻo ke kiko nona ka ʻokoʻa pae o ¾ ʻo ia…
A. P me Q
ʻO B. P me R
ʻO C. P me S
D. Q me S
E. R me S
Pahana
Ke Kānāwai o Ampere
Ke Kānāwai o Ampere
Ua hāpai ka ʻepekema Farani ʻo Andre Marie Ampère (1775–1836) i kahi pilina maʻamau ma waena o ke au uila e kahe ana ma o kekahi alakaʻi a me ke kahua magnetic i hana ʻia a puni. ʻO ke kānāwai kēia o Ampère. Hōʻike ka hoohalike ma lalo nei i ke kānāwai o Ampère.
—–> Ke Kānāwai o Ampere
ʻO ka huina o nā ʻāpana (Σ) o ke kahua magnetic (B) e kūlike ana me ka lōʻihi o ke alakaʻi, i hoʻonui ʻia me ka lōʻihi o ke alakaʻi (∆l), ua like ia me ka huahana o µ o (µ o = 4π x 10 -7 Tm/A) a me ke au uila (I).
ʻO ka ikaika makeneka ma waena o ʻelua mau uea pololei like e lawe ana i ke au uila
Mea Hana Mana makeneka ma waena o ʻelua mau uea pololei like e lawe ana i ke au uila
ʻO ke au uila e kahe ana ma o kahi uea e hana i kahi kahua makeneti a puni ia. Inā pololei ke uea, hana nā laina kahua makeneti i kahi pōʻai, me ke uea pololei ma ke kikowaena o ka pōʻai.
Inā he ʻelua mau uea alakaʻi pololei like a hoʻokaʻawale ʻia e ka mamao L, a laila ua ʻike ʻia ke kahua makeneka i hana ʻia e ke au uila ma ke uea alakaʻi 1 ma ke uea alakaʻi 2, pēlā nō hoʻi ke kahua makeneka i hana ʻia e ke au uila ma ke uea alakaʻi 2 ma ke uea alakaʻi 1.
Ka nui o ka ikaika magnetic
ʻO ke kahua makeneka i hoʻokumu ʻia e ke au uila i loko o kahi uea lōʻihi pololei
Nā mea e pili ana i nā kahua magnetic i hoʻokumu ʻia e ke au uila i loko o kahi uea lōʻihi pololei
Nā kumuhana Au uila, hoʻouku uila, kahua makeneka, ikaika hika na kanakaE wehewehe hiki i ke au uila ke hana i kahi kahua makeneka. Inā kahe ke au uila ma o kahi uea lōʻihi a pololei, hoʻopuka ʻia kahi kahua makeneka, me nā laina kahua makeneka e hana ana i kahi pōʻai a puni ke uea ma ke kikowaena. Hōʻike ke kiʻi ma ka ʻākau i kēia.
Au uila, hoʻouku uila, kahua makeneka, ikaika makeneka
Nā mea e pili ana i ke au uila, ka hoʻouku uila, ke kahua makeneti, ka ikaika makeneti
I ka makahiki 1819, ua ʻike kekahi ʻepekema Denemaka i kapa ʻia ʻo Hans Christian Oersted (1777–1851) i ka pilina ma waena o ka magnetism a me ke au uila , a i ʻole nā uku e neʻe ana . Ua ʻike ʻo ia i ka wā e kokoke ana kahi nila panana i kahi uea e lawe ana i kahi au uila, ua hoʻohuli ʻia ia. I ka wā ʻaʻohe au uila, kuhikuhi ka nila panana i ka ʻākau.
He makeneka ka nila panana, no laila hiki i ka ikaika makeneka ke hoʻoneʻe iā ia . Ma hea mai ka ikaika makeneka (F)? Ma kahi kokoke i ka nila panana he uea e lawe ana i kahi au uila, no laila pono ke au uila e hoʻopuka i kahi ikaika makeneka.
E nānā i ke kiʻi ma ka ʻākau. E hoʻohana i ke kānāwai lima ʻākau e hoʻoholo ai i ke kuhikuhi o ke au uila a me ke kuhikuhi o ke kahua magnetic. Inā neʻe ke au uila (I) i luna, e like ke kuhikuhi o ke kahua magnetic (B) me ka mea i hōʻike ʻia ma ke kiʻi ma ka hema. I ka ʻaoʻao ʻē aʻe, inā neʻe ke au uila i lalo, e like ke kuhikuhi o ke kahua magnetic me ka mea i hōʻike ʻia ma ke kiʻi ma ka ʻākau.