Chitsanzo cha vuto la mphamvu ya capacitor ya mbale yofanana

Zitsanzo 7 za mafunso okhudza mphamvu ya capacitor ya mbale yofanana

1. Capacitor ya mbale yofanana yokhala ndi mphamvu ya C ili ndi vacuum permittivity ya ε_o, dera lopingasa A ndi mtunda pakati pa mbale d. Ngati dera lopingasa la capacitor lawonjezeka kufika nthawi 4, mtunda pakati pa mbale umakhala 2d ndipo vacuum permittivity imakhala 5ε_o,maka mphamvu ya capacitor ya mbale yofanana imasanduka…
Zokambirana
Ndizodziwika kuti :
Anafunsa Ngati vacuum permittivity = 5ε_o, malo opingasa = 4A ndipo mtunda pakati pa mbale = 2d ndiye mphamvu ya capacitor ya mbale yofanana imasintha kukhala...
Yankhani :
Mphamvu ya capacitor ya mbale yofanana imasintha kufika pa kuwirikiza ka 10 mphamvu yake yoyamba.

2. Capacitor yokhala ndi mphamvu yayikulu kwambiri kutengera graph ili pansipa ndi…

Zokambirana
Fomula ya capacitor yofanana ndi mbale :
Kutha kwa capacitor iliyonse :
Capacitor yomwe ili ndi mphamvu yayikulu kwambiri ya capacitor ndi capacitor ya 3 (C)₃).

3. Samalani zinthu zotsatirazi!
(1) Chokhazikika cha Dielectric
(2) Kusiyana komwe kulipo pakati pa mbale
(3) Kukhuthala kwa mbale
(4) Malo ozungulira diski
(5) Mtunda pakati pa zidutswa ziwirizi
(6) Kuchuluka kwa mphamvu yamagetsi
Zinthu zomwe zimakhudza mphamvu capacitor yofanana ya mbale ndi…
Zokambirana
Kutengera ndi njira yogwiritsira ntchito mphamvu ya capacitor, zatsimikiziridwa kuti zinthu zomwe zimakhudza mphamvu ya capacitor ndi (1), (4) ndi (5).

4. Kuyerekeza kwa mphamvu za ma capacitor 1 ndi 2 ndi…

Zokambirana
Ndizodziwika kuti :
Capacitor 1:
Malo ozungulira = 2A
Mtunda pakati pa mbale = d₁
Capacitor 2:
Malo ozungulira = A
Mtunda pakati pa mbale = 2 d₁
Anafunsa Kuyerekeza mphamvu za ma capacitor 1 ndi 2
Yankhani :
Kuyerekeza kwa mphamvu za ma capacitor 1 ndi 2:

5. Chithunzi chotsatirachi chikuwonetsa ma capacitor awiri ofanana a mbale I ndi II.
Kuyerekeza kwa mphamvu za ma capacitor a mbale yofanana I ndi II ndi ...

A. 1: 6
B. 1: 1
C. 2: 3
D. 3: 2
E. 6: 1

Zokambirana
Chojambulira mbale chofanana I:
Capacitor ya mbale yofanana II:

Kuyerekeza kwa ma capacitor a mbale yofanana I ndi II:

Yankho lolondola ndi A.

6. Yang'anani chithunzi cha ma capacitor awiri ofanana a mbale pansipa! Ngati A ₁ = ½ A ₂ ndi d ₂ = 3 d ₁ ndiye kuti chiŵerengero cha mphamvu ya ma capacitor ofanana a mbale pakati pa chithunzi (2) ndi chithunzi (1) ndi…

A. 2/5
B. 2/3
C. 3/4
D. 3/2
4/3

Zokambirana
Ndizodziwika kuti :
Capacitor ya mbale yofanana 1:
A₁ = 1
d₁ = 1
Capacitor ya mbale yofanana 2:
A₂ = 2
d₂ = 3
Anafunsa Kuyerekeza mphamvu ya ma capacitor a mbale yofanana 2 ndi 1
Yankhani :
Chojambulira mbale chofanana I:
Capacitor ya mbale yofanana II:
Kuyerekeza kwa ma capacitor a mbale yofanana II ndi I:
Yankho lolondola ndi B.

7. Mtunda pakati pa zidutswa ziwiri zachitsulo zofananira ndi 0,2 cm. Zidutswa ziwiri zachitsulo zimapatsidwa mphamvu zamagetsi zosiyana mpaka kusiyana komwe kungatheke kufika pa 20.000 volts. Mphamvu ya electron ndi 1,6 × 10 ^–19 C. Kukula ndi kulunjika kwa mphamvu ya Coulomb pa electron pakati pa zidutswa ziwiri zachitsulo ndi...

A. 0,80 × 10^-12 N, mmwamba
B. 1,20 × 10^-12 N, pansi
C. 1,20 × 10^-12 N, mmwamba
D. 1,62 × 10^-12 N, pansi
E. 1,62 × 10^-12 N, mmwamba
Kukambirana:
Ndizodziwika kuti :
d = 0,2 cm = 0,002 m
V = 20.000 Volt
e = 1,62 x 10^-19 C
Anafunsa :
Mphamvu yamagetsi (F) ?
Yankhani :
Fomula ya magetsi, magetsi ndi mtunda pakati pa mbale :
E = V / d
Kufotokozera: E = magetsi, V = magetsi, d = mtunda pakati pa mbale
Fomula ya mphamvu ya Coulomb, munda wamagetsi ndi cholipiritsa :
F = q E
Kufotokozera: F = Coulomb mphamvu kapena mphamvu yamagetsi, q = chaji, E = munda wamagetsi
Kukula ndi malangizo a mphamvu ya Coulomb pa ma elekitironi :
F = q E = q V / d
F = (1,62 x 10^-19 C(20.000 V) / 0,002 m
F = 1,62 x 10^-12 N
Ma electron ali ndi mphamvu yoipa, kotero amakankhidwa ndi mbale yoipa ndikukokedwa ndi mbale yoipa. Choncho mphamvuyo imayang'ana mmwamba.
Yankho lolondola ndi E.