Mienzaniso gumi yeMibvunzo yeKupinza Magetsi EMF Kupinza
1. Jenareta ine coil ine maturns akawanda N nenzvimbo ine chikamu A. Coil iri mumunda wemagineti B, yozotenderedzwa ne angular velocity ω kuitira kuti pagadzirwe maximum induced EMF ye50 volts. Kana magnetic field ikachinja kuita 1/2 yemutengo wayo wepakutanga uye angular velocity yayo ikachinja kuita 4 times yemutengo wayo wepakutanga, saka maximum induced EMF ichave...
A. 25 volts
B. 50 volts
C. 100 volts
D. 200 volts
E. 250 volts
Kukurukurirana
Zvinozivikanwa kuti:
Nhamba yematenderedzwa 1 (N 1 ) = N
Nzvimbo yepakati pezvikamu 1 (A 1 ) = A
Munda wemagineti 1 (B 1 ) = B
Kumhanya kwekona 1 (ω 1 ) = ω
EMF 1 (ε 1 ) = 50 Volts
Munda wemagineti 2 (B 2 ) = 0,5B = 0,5(1) = 0,5
Angular velocity 2 (ω 2 ) = 4ω = 4(1) = 4
Mubvunzo: EMF yakanyanya kukonzerwa i2 ( ε2 )
Mhinduro:
Equation yeEMF inokonzerwa zvakanyanya:
ε max = NBA ω
Information :
ε max = emf yakanyanya kukonzerwa, N = nhamba yekutenderera, B = simba remagineti, A = nzvimbo yechikamu chakayambuka, ω = kumhanya kwekona
Maximum induced EMF 1 (ε 1 ):
ε max = NBA ω
Kana ω = 1 uye B = 1 saka
50 = N (1) A (1)
50 = NA
Maximum induced EMF 2 (ε 2 ):
ε max = NBA ω
NA = 50, B = 0,5, ω = 4
ε max = (50)(0,5)(4)
ε max = 100
Mhinduro chaiyo ndiC.
2. Kuti EMF yepamusoro inogadzirwa nejenareta ive 1/2 yepakutanga, huwandu hunofanirwa kuchinjwa zvichibva pane zvakataurwa pazasi ndehwekuti...
A. Kumhanya kwekona uye huwandu hwekutenderera zvinopetwa kaviri
B. Kupinza kwemagnetic uye frequency yayo zvakapetwa kaviri.
C. Nzvimbo yepakati pechikamu inopetwa kaviri uye nguva yacho inopetwa kaviri
D. Huwandu hwematenderedzwa nenguva zvinoitwa ka4 kupfuura yekutanga.
E. Kuwanda uye nguva zvinopetwa kaviri.
Kukurukurirana
Equation yeEMF inokonzerwa zvakanyanya:
ε max = NBA ω
Information :
ε max = emf yakanyanya kukonzerwa, N = nhamba yekutenderera, B = simba remagineti, A = nzvimbo yechikamu chakayambuka, ω = kumhanya kwekona
Kana N = 1, B = 1, A = 1, ω = 1 zvino ε max = NBA ω = (1)(1)(1)(1) = 1
A. Kumhanya kwekona (ω) uye nhamba yekutenderera (N) zvakapetwa kaviri
ε max = NBA ω
ε max = (2)(1)(1)(2)
ε max = 4
B. Kupinza kwemagnetic (B) uye frequency yayo (f) zvakapetwa kaviri.
Fomura yekumhanya kwe angular (ω) = 2πf. Mafambiro anoenderana zvakananga zvekuti kana frequency (f) yakapetwa kaviri, kumhanya kwe angular (ω) kunopetwa kaviri.
ε max = NBA ω
ε max = (1)(2)(1)(2)
ε max = 4
C. Nzvimbo yepakati pechikamu (A) inopetwa kaviri uye nguva yacho inopetwa ka4 kupfuura yekutanga
Fomura yekumhanya kwe angular (ω) = 2πf = 2π/T. Nguva iyi inoenzana zvakanyanya zvekuti kana nguva yacho ikava yekutanga ka4, ipapo kumhanya kwe angular kunova 1/4 kakapetwa yekutanga.
ε max = NBA ω
ε max = (1)(1)(2)(1/4) = 2/4
ε max = 1/2
D. Huwandu hwekutenderera (N) uye period (T) hwakawedzerwa kusvika ka4
Fomura yekumhanya kwe angular (ω) = 2πf = 2π/T. Nguva iyi inoenzana zvakanyanya zvekuti kana nguva yacho ikava yekutanga ka4, ipapo kumhanya kwe angular kunova 1/4 kakapetwa yekutanga.
ε max = NBA ω
ε max = (4)(1)(1)(1/4) = 4/4
ε max = 1
E. Kuwanda (f) uye period (T) zvakapetwa kaviri.
Mafambiro acho anoenderana zvakananga zvekuti kana mafrequency (f) akapetwa kaviri, angular velocity (ω) inova kaviri. Nguva yacho inoenzana zvakanyanya zvekuti kana nguva yacho ikapetwa kaviri, angular velocity inova 1/2 yepakutanga. Mugumisiro wekupedzisira, angular velocity inogara iripo.
ε max = NBA ω
ε max = (1)(1)(1)(1)
ε max = 1
Mhinduro chaiyo ndiC.
3. Kuyerera kwemagineti mukoiri ine kutenderera chiuru chimwe (1.000 turns) kunowedzera kubva pa0,03 Wb kusvika pa0,04 Wb mumasekonzi 0,2 zvekuti kukosha kweEMF kunobva kwaitika iE1 . Kana koiri imwecheteyo ikasangana nekuchinja kwekushanduka kwemagineti kubva pa0,02 Wb kusvika pa0,04 Wb mumasekonzi 0,1, kukosha kweEMF kunobva kwaitika iE2 . Chiyero cheE1 neE2 ndeche …
A. 1: 1
B. 1: 2
C. 1 : 4
D. 2: 1
Chikamu 4: 1
Kukurukurirana
Zvinozivikanwa kuti:
Nhamba yekutenderera (N) = 1000
Kuchinja kweFlux 1 ( Δφ 1 ) = 0,04 Wb – 0,03 Wb = 0,01 Wb
Nguva yepakati 1 (Δt 1 ) = 0,2 masekondi
EMF 1 inokonzereswa = E 1
Kuchinja kweFlux 2 ( Δφ 1 ) = 0,04 Wb – 0,02 Wb = 0,02 Wb
Nguva yepakati 2 (Δt 2 ) = 0,1 masekondi
EMF 2 inokonzereswa = E 2
Akabvunzwa: E 1 : E 2
Mhinduro:
Kuenzanisa E 1 na E 2 :
E 1 : E 2
50: 200
1: 4
Mhinduro chaiyo ndiC.
4. Coil inopinda mumunda wemagineti wakafanana zvakananga, zvichikonzera EMF inokonzereswa. Kana coil ikatsiviwa neimwe coil ine nhamba yakapetwa kaviri yekutenderera kwecoil yekutanga uye mwero wekuchinja kweflux unoramba wakafanana, saka chiyero cheEMF inokonzereswa yekutanga neyekupedzisira...
A. 1: 1
B. 1: 2
C. 2 : 1
D. 3: 1
Chikamu 3: 2
Kukurukurirana
Zvinozivikanwa :
Nhamba yekutanga yekutenderera (N) = 1
Nhamba yekupedzisira yekutenderera (N) = 2
Chiyero chekutanga chekuchinja kweflux (ΔØ)B / Δt) = mwero wekuchinja kwekupedzisira kweflux (ΔØ)B /Δt)
Akabvunzwa : Kuenzanisa EMF yekutanga neyekupedzisira inokonzerwa
Jawab :
Mutemo waFaraday wefomura yekudzikisa :
E = -N (ΔØ)B /Δt)
Tsananguro: E = induced emf, N = nhamba yekutenderera, ΔØB / Δt = mwero wekuchinja kwekushanduka
Kuenzanisa kweEMF yekutanga neyekupedzisira inokonzerwa :
Kutanga E: Kuguma E
-N (ΔØ)B / Δt): -N (ΔØB /Δt)
1: 2
Mhinduro chaiyo ndeiyi B.
5. Mumamiriro ekutanga (1), magnetic flux inoshanduka ne5 Wb mumasekonzi maviri mu coil ine maturns makumi maviri. Mumamiriro (2), flux shanduko imwe chete inotora masekonzi masere. Chiyero cheEMF inokonzerwa mumamiriro (1) uye (2) ndeche…
A. 1: 1
B. 2: 1
C. 3 : 1
D. 4: 1
Chikamu 4: 3
Kukurukurirana
Zvinozivikanwa :
Mwero wekuchinja kwekufamba (ΔØ)B / Δt) yekutanga = 5/2
Mwero wekuchinja kwekufamba (ΔØ)B / Δt) magumo = 5/8
Nhamba yekutenderera (N) = 20
Akabvunzwa : Kuenzanisa EMF yekutanga neyekupedzisira inokonzerwa
Jawab :
Kutanga E: Kuguma E
-N (ΔØ)B / Δt): -N (ΔØB /Δt)
20 (5/2): 20 (5/8)
5/2: 5/8
1/1: 4/1
4: 1
Mhinduro chaiyo ndiD.
6. Kuyerera kwemagineti kwekoiri yekutanga kune matenderere mazana maviri uye kunoshanduka ne0,06 Wb mumasekonzi 0,4. Mukoiri yechipiri, mafambiro emagineti anoshanduka ne0,08 Wb mumasekonzi 0,2. Kana huwandu hwematenderere mukoiri yechipiri hukatsiviwa nehafu yehuwandu hwematenderere mukoiri yekutanga, saka chiyero che emf induced mukoiri yekutanga neyechipiri ndeche...
A. 2: 3
B. 3: 1
C. 3 : 4
D. 3: 5
Chikamu 3: 8
Kukurukurirana
Zvinozivikanwa :
Mwero wekuchinja kwekufamba (ΔØ)B / Δt) yekutanga = 0,06/0,4
Nhamba yekutanga yekutenderera (N) = 200
Mwero wekuchinja kwekufamba (ΔØ)B / Δt) magumo = 0,08/0,2
Nhamba yekupedzisira yekutenderera (N) = 100
Akabvunzwa : Kuenzanisa EMF yekutanga neyekupedzisira inokonzerwa
Jawab :
Kutanga E: Kuguma E
-N (ΔØ)B / 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. Pakati pezvinhu zvinotevera:
(1) Nhamba yekutenderera kwekoiri
(2) Mwero wekuchinja kwesimba remagineti
(3) Kutungamirirwa kwesimba remagineti
Chinowedzera EMF inokonzerwa ndeche….
A. (1), (2), uye (3)
B. (1) uye (2) chete
C. (1) uye (3) chete
D. (1) chete
E. (2) chete
Kukurukurirana
EMF inomiririra Electromotive Force. Nemamwe mashoko, EMF inzvimbo inobva magetsi, senge bhatiri, nezvimwewo. Zvichibva pakuedza kwakaitwa naFaraday, zvakaonekwa kuti kunyangwe simba remagineti risingagone kugadzira magetsi, simba remagineti rinoshanduka rinogona kugadzira magetsi. Simba remagineti iri rinobuda rinonzi induced current.
Zvinhu zvinopesvedzera EMF zvinogona kuonekwa uchishandisa mutemo waFaraday we induction, unotsanangurwa nemasvomhu nefomura iyi:
Chiratidzo chekuramba chiri mufomura iri pamusoro apa chinotsanangura kuti divi resimba remagineti rinogadzirwa nemagetsi anokonzereswa nguva dzose rinopesana nedivi resimba remagineti rinoburitsa magetsi anokonzereswa.
Information :
N = nhamba yekutenderera kwekoiri, B = simba remagineti, A = nzvimbo yenzvimbo yedenderedzwa, θ = kona iri pakati pesimba remagineti (B) nemutsetse wakatarisana nepamusoro pekoiri (A).
Kana B yakamira yakatarisana nepamusoro pe coil saka θ = 0 o kuitira kuti Φ B = BA cos 0 o = BA (1) = B A.
Kana B iri parallel nepamusoro pe coil saka θ = 90 o saka Φ B = BA cos 9 0 o = BA (0) = 0.
Zvichibva pafomura iri pamusoro apa, zvakagumiswa kuti chinowedzera EMF inokonzerwa nhamba yekutenderera kwecoil (N), chiyero chekuchinja kwemagnetic flux uye gwara remagnetic field (θ ).
Mhinduro chaiyo ndiA.
8. Pakati pezvinhu zvinotevera:
(1) nhamba yekutenderera kwekoiri
(2) mwero wekuchinja kwesimba remagineti
(3) zvipingamupinyi zvekunze
Chinopesvedzera EMF inokonzerwa mu coil ndeche….
A. (1) na (3)
B. (1) uye (2)
C. (2) chete
D. (2) na (3)
E. (3) chete
Kukurukurirana
Mhinduro chaiyo ndeiyi B.
9. Tarisa mufananidzo unotevera! Kana magetsi ndikaapfuura nepakati pewaya AB, zvinoreva kuti simba remagineti rinoonekwa newaya AB ndiro...
A. Kuenda kuB
B. Kuruboshwe
C. Kurudyi
D. Yakatarisana nepepa
E. Yakatarisana nepepa
Kukurukurirana
Zvinozivikanwa :
Kutungamira kwemagetsi = A kusvika B (pasi)
Kutungamira kwesimba remagineti = danda rekuchamhembe kuenda kudanda rekuchamhembe remagineti (kurudyi)
Akabvunzwa : Kutungamira kwesimba remagineti
Jawab :
Mutemo weruoko rwerudyi
Tambanudza ruoko rwako rwerudyi, ruramisa chigunwe chako, wovhara mimwe minwe yako mina. Rongedza minwe yako mina kuitira kuti iende kwakananga simba remagineti (B). dhani Chigunwe chinoratidza mafambiro echaji (v). Kana chaji yemagetsi iri positive, chanza cheruoko rwerudyi chinotarisa divi resimba remagineti (F). Kana chaji iri negative, kumashure kweruoko rwerudyi kunotarisa divi resimba remagineti (F).
Kutungamira kwemagetsi emagetsi akajairika, sezviri mudambudziko riri pamusoro, kwakafanana nekutungamira kwekuchaja kwemagetsi kwakanaka. Uchishandisa mutemo wekurudyi, kutungamira kwesimba remagineti kwakatarisana nepepa, kana kuziso remuverengi.
Mhinduro chaiyo ndiE.
10. Waya yakatwasuka inotakura magetsi emagetsi I inoiswa pakati pematanda maviri emagineti sezvakaratidzwa mumufananidzo. Kutungamira kwesimba remagineti pawaya kuri munzira imwechete ne...
A. Positive z-axis
B. Negative z-axis
C. Yakanaka y-axis
D. Y-axis isina kunaka
E. X-axis yakanaka
Kukurukurirana
Zvinozivikanwa :
Kutungamira kwemagetsi = kuruboshwe
Kutungamira kwesimba remagineti = kuchamhembe kuenda kumaodzanyemba (kumusoro)
Akabvunzwa : Kutungamira kwesimba remagineti
Jawab :
Kana mutemo weruoko rwerudyi ukashandisa, kutungamira kwesimba remagineti kwakanangana nepepa kana kure neziso remuverengi kana munzira ye negative z axis.
Mhinduro chaiyo ndeiyi B.
Kwakabva mubvunzo:
Mibvunzo yeNational Examination Physics yeChikoro Chesekondari/Chikoro Chepamusoro Chebasa
