Fomula ya lamulo la Ampere ya EMF yoyambitsidwa ndi transformer

Zitsanzo za mafunso ndi njira za lamulo la Ampere la EMF yoyambitsa transformer

Lamulo la Ampere

1. Malinga ndi H.C. Oersted, mphamvu yamagetsi imapanga mphamvu ya maginito. Popanga chiphunzitsochi, coil yonyamula mphamvu yamagetsi imapanganso mphamvu ya maginito. Coil yomwe, ikanyamula mphamvu yamagetsi, imapanga mphamvu ya maginito yofanana ndi yomwe imapangidwa ndi maginito a bar ndi...

A. toroid
B. solenoid
C. waya wozungulira
D. chozungulira chamakona anayi

Zokambirana

Magineti ya bar ili ndi ndodo ziwiri: ndodo ya kumpoto ndi ndodo ya kum'mwera. Mphamvu ya maginito yopangidwa ndi maginito ya bar imaimiridwa ndi mizere ya maginito, yomwe imachokera kumpoto ndikulowa mu ndodo yakum'mwera.
Mphamvu ya maginito yopangidwa ndi maginito a bar ndi yofanana ndi mphamvu ya maginito yopangidwa ndi solenoid, monga momwe zilili pachithunzi chomwe chili m'mbali.
Solenoid ndi waya wautali wokhala ndi maginito ambiri. Chithunzi chili pansipa chikuwonetsa chitsanzo cha kupanga maginito pokulunga waya wokhala ndi magetsi ozungulira. Kulunjika kwa maginito kumatha kudziwika pogwiritsa ntchito lamulo la dzanja lamanja.
Tambasulani dzanja lanu lamanja, mukaliike pamalo pomwe chikhatho cha dzanja lanu chikuyang'ana nkhope yanu. Tambasulani chala chanu chachikulu ndikupindika zala zina zinayi kutsogolo kumaso kwanu. Kulunjika kwa mapindo a zala zinayi kukugwirizana ndi komwe magetsi akuyenda mu coil, pomwe chala chachikulu chikuyang'ana kumpoto kwa mphamvu yamaginito. Chala chachikulu chikuyang'ana ku N axis, kotero N imayimira kumpoto kwa maginito ndipo M imayimira kumwera kwa maginito.
Yankho lolondola ndi B.

Toroid

2. Mphamvu ya maginito yopangidwa ndi toroid yonyamula magetsi ili ndi komwe ikupita….

A. yolunjika ku ndege ya toroid
B. chozungulira
C. kubwerera ndi kubwera
D. zimadalira nthawi

Zokambirana
Toroid ndi solenoid yozungulira kotero pogwiritsa ntchito lamulo la dzanja lamanja, mphamvu ya maginito yopangidwa ndi toroid imakhala ndi njira yozungulira.
Yankho lolondola ndi B.

EMF yoyambitsidwa

3. Ngati maginito asunthidwa mu coil, mphamvu yamagetsi yoyambitsidwa idzachitika pakati pa malekezero a coil. Chochitikachi chimayambitsidwa ndi...
A. Pali kusintha kwa njira ya mphamvu ya maginito komwe kumadula coil.
B. pali kusintha kwa maginito omwe amadula coil
C. pali kusintha kwa kuchuluka kwa mizere ya mphamvu ya maginito yomwe imadula coil
D. pali kuchepa kwa kuchuluka kwa mizere ya maginito ya mphamvu yomwe imadula coil
Zokambirana
Mphamvu yamagetsi yoyendetsedwa ndi magetsi imapangidwa ndi mphamvu yamagetsi yosintha. Kukula kwa EMF yoyendetsedwa sikudalira kusintha kwa mphamvu yamagetsi koma kusintha kwa mphamvu yamagetsi. Mphamvu yamagetsi ndi kuchuluka kwa mizere yamagetsi yomwe imadutsa mu coil. Fomula yamasamu ya mphamvu yamagetsi ndi Φ._B = BA cos θ. Ngati mizere ya maginito ili yolunjika pamwamba pa coil, ndiye kuti ngodya yomwe imapangidwa pakati pa mizere ya maginito ndi mzere wabwinobwino ndi 0_o, pomwe cosine ndi 0_o = 1. Ngati mizere ya maginito ikufanana ndi malo a pamwamba pa coil ndiye kuti ngodya yopangidwa ndi 90^o, pomwe cosine ndi 90^o = 0. Chifukwa chake maginito flux amakhala ndi mtengo wocheperako pamene mizere ya maginito ikufanana ndi malo a pamwamba pa coil ndipo mtengo wokwera kwambiri pamene mizere ya maginito ikufanana ndi malo a pamwamba pa coil.
Kukula kwa emf yoyambitsidwa kumawerengedwa pogwiritsa ntchito lamulo la Faraday la induction formula:

Chizindikiro chotsutsa chimasonyeza kuti mphamvu yamagetsi yoyambitsidwa imapanga magetsi motsutsana ndi komwe kusintha kwa flux kumayambira. Mawu awa amatchedwa lamulo la Lenz.
Yankho lolondola ndi C.

4. EMF yomwe imachitika mu coil imawonjezeka motsatizana ndi nthawi. Ngati malo a coil amakhalabe osasinthasintha ndipo mphamvu ya maginito ili yolunjika pamwamba pa coil, ndiye kuti graph ya mphamvu ya maginito yomwe ingakhalepo pa vutoli ndi….

Zokambirana
Kukula kwa emf yoyambitsidwa kumawerengedwa pogwiritsa ntchito lamulo la Faraday la induction formula:

Ngati mphamvu yamagetsi ili yolunjika pamwamba pa coil ndiye kuti:

Zambiri:

Ngati mphamvu ya maginito ili yolunjika pamwamba pa coil, njira ya maginito ya flux ndi iyi:

B = mphamvu ya maginito, A = malo apamwamba a coil.
Malo a pamwamba pa coil ali ndi mtengo wokhazikika ndipo mphamvu ya maginito imakhala yolunjika pamwamba pa coil kotero ili ndi mtengo wokhazikika.
Chifukwa chake kutengera njira yomwe ili pamwambapa, zitha kuganiziridwa kuti chomwe chimakhudza mtengo wa emf yoyambitsidwa ndi kuchuluka kwa kusintha kwa flux, ngati kuchuluka kwa kusintha kwa flux kuli kwakukulu ndiye kuti emf yoyambitsidwa ndi yayikulu.
Yankho lolondola ndi B.

thiransifoma

5. Samalani ndi mawu otsatirawa!
1. Chiwerengero cha ma windings oyambira ndi ochepa kuposa chiwerengero cha ma windings achiwiri
2. Voliyumu yoyamba ndi yayikulu kuposa voliyumu yachiwiri
3. Mphamvu yoyamba ndi yayikulu kuposa mphamvu yachiwiri
4. Mphamvu yoyamba ndi yochepa kuposa mphamvu yachiwiri
Mawu omwe akugwirizana ndi makhalidwe a transformer yokwera ndi awa….
A. mawu 1 ndi 2
B. mawu 1 ndi 3
C. mawu 2 ndi 3
D. mawu 2 ndi 4
Zokambirana
Transformer ndi chipangizo chosinthira magetsi a alternating current (AC). Pali mitundu iwiri ya ma transformer: ma step-up transformers ndi ma step-down transformers. Ma step-up transformers amawonjezera magetsi, pomwe ma step-down transformers amachepetsa magetsi.
Transformer ya step up imagwira ntchito yowonjezera magetsi kuti makhalidwe ake akhale:
1. Voliyumu yoyamba ndi yocheperako, voliyumu yachiwiri ndi yayikulu
2. Mphamvu yamagetsi yoyambirira ndi yayikulu, mphamvu yamagetsi yachiwiri ndi yaying'ono
3. Chiwerengero cha ma turn oyambira ndi ochepa, chiwerengero cha ma turn owonjezera ndi ochuluka

Makhalidwe a transformer yotsika pansi amagwira ntchito yochepetsa magetsi kuti makhalidwe ake ndi awa:
1. Voliyumu yoyamba ndi yayikulu, voliyumu yachiwiri ndi yaying'ono
2. Mphamvu yamagetsi yoyambirira ndi yaying'ono, mphamvu yamagetsi yachiwiri ndi yayikulu
2. Chiwerengero cha ma turn oyambira ndi chachikulu, chiwerengero cha ma turn owonjezera ndi chochepa.

Mphamvu yamagetsi ndi mphamvu yamagetsi yomwe imagwiritsidwa ntchito pa nthawi inayake. Mphamvu imasungidwa, motero mphamvu imasungidwanso. Chifukwa chake, mphamvu yamagetsi mu coil yoyamba ndi yofanana ndi mphamvu yamagetsi mu coil yachiwiri, komanso mphamvu yamagetsi.
Fomula yamagetsi:
P = VI
Kufotokozera: P = mphamvu yamagetsi, V = magetsi amagetsi, I = magetsi amagetsi
Mphamvu yokhazikika, motero kutengera njira iyi, zatsimikiziridwa kuti ngati magetsi amagetsi ndi akulu, ndiye kuti magetsi amagetsi ndi ochepa kotero kuti chinthu chopangidwa ndi magetsi amagetsi ndi magetsi amagetsi chimakhala ndi phindu losasintha.
Yankho lolondola ndi B.