65 9 . B ir-b irid an q an d a y m asofad a 1 \xC va 10 n C za ry ad -
la r 9 m N k u ch b ilan o ‘z a ro t a ’sirlashadi?
660. Z aryadlardan biri 4 m arta orttirilganda ulam ing o ‘zaro
t a ’sir k u ch lari a w a lg id e k qolishi u c h u n u la r orasidagi m a so
fani n e c h a m a rta o ‘zgartirish lozim ?
6 6 1 . Ik k ita e le k tro n orasidagi e le k tr itarishish k u ch i u lar-
n in g b ir-b irig a g ra v ita tsio n to rtish ish k u c h id a n n e c h a m arta
k atta?
662. H a r b irining m assasi 0,2 g d an b o ‘l-
gan ikkita b ir xil sh arch a ipga 93- rasm da k o ‘r-
satilgandek osilgan. S h a rc h a la r orasidagi m a-
sofa B C = 3 sm . A gar sh a rc h a la rn in g h a r biriga
10 n C d a n b ir xil zaryad berilsa, ip n in g A B va
B C q ism larining taranglanish kuchini toping.
B unda: a) za ry ad lar b ir xil ishorali; b) za ry ad -
la r h a r xil ishorali b o i g a n h o lla m i q a ra b c h i-
qing.
6 6 3 . Ik k ita b ir xil s h a rc h a b ir-b irid a n 10 sm
m aso fad a tu rib d i. U la r b ir xil m iq d o rd a m anfiy
В
zaryadga ega b o ‘lib , 0,23 m N k u c h b ila n o ‘z a ro
93- rasm.
ta ’sirlashadi. H a r qaysi sh arch ad a g i «ortiqcha»
e le k tro n la r so n in i to p in g .
1
B u p a ra g r a fd a g i m a s a la la r d a , a g a r m a x s u s iz o h b o l m a s a , z a r y a d -
l a r n i n u q ta v i y z a r y a d l a r v a v a k u u m ( h a v o ) d a j o y l a s h g a n d e b
h is o b la n g .
2
Q i s q a c h a « z a ry a d » a t a m a s i o s t i d a z a r y a d l a n g a n j i s m l a r y o k i
z a r r a c h a l a r t u s h u n il a d i.
95
664.
Ikkita m etall sh arch a sh u n d ay za ry ad lan g a n k i, u la r
da n birining zaryadi ikkinchisinikidan 5 m arta ortiq. S harchalar
bir-biriga tekkizilib, yana aw algi m asofaga surib q o ‘yiladi. A gar
sh a rc h a la r b ir xil ishorali zaryad b ilan za ry ad lan g a n b o ‘lsa,
bunda o ‘zaro t a ’sir kuchi (m odul b o ‘yicha) nech a m arta o ‘z-
gargan? H a r xil ishorali zaryad bilan zaryadlangan b o ‘lsa-chi?
6 6 5 * . M iqdorlari te n g b o ‘lm ag an b ir xil ishorali za ry a d
lar bilan za ry ad lan g an ikkita b ir xil m etall sh a rc h a n i b ir-
biriga tekkizib, so ‘ng y an a a w a lg i m asofaga surib qo^yilganda
u la r o ra sid a g i o ‘z a ro t a ’s ir k u c h i, a lb a tta , o rtis h in i, sh u
bilan birga, zaryadlar m iqdoridagi farq qan ch alik katta b o ig a n
b o is a , bu o rtish sh u n c h a lik k a tta b o lis h in i isbot qiling.
6 6 6
. Bir xil ishorali q va 4 # z a ry a d la r b ilan za ry ad lan g a n
ikkita b ir xil m etall sh a rc h a b ir-b irid a n
r
m aso fad a turibdi.
S h arc h alar bir-biriga tekkiziladi. 0 ‘zaro ta ’sir kuchi aw alg id e k
qolishi u c h u n u larn i q a n d a y x m asofaga surish lozim ?
6 6 7 . 10 va 16 n C z a ry ad lar b ir-b irid a n 7 m m m aso fada
joylashgan. K ichik zary ad d an 3 m m va k a tta zary ad d a n 4 m m
m asofada b o ig a n nuqtaga joylashtirilgan 2 n C zaryadga q an ch a
kuch t a ’sir q iladi?
6 6 8
. л-q va - q z a ry a d la r m ay d o n ig a (9 4 - rasm ) | zaryad
d astlab С n u q ta g a , s o ’ngra D n u q ta g a jo y la sh tirild i. A gar
DA = A C = C B b o i s a , | zary ad g a ta ’sir qiladigan k u ch larn i
(m o d u l b o ‘y ic h a ) taq q o slan g .
6 6 9 . 90 va 10 n C z a ry a d la r b ir-b irid a n 4 sm m aso fad a
jo y lash g an . U c h in c h i zaryad m u v o z a n a td a turish i u c h u n un i
qayerga jo y lash tirish lozim ?
6 7 0 . T o m o n i a b o i g a n m u n ta z a m o ltib u r c h a k n in g
u ch larig a +q, +q, +q, - q , - q , - q z a ry a d la r jo y lash tirilg a n .
O ltib u rc h a k n in g m a rk a z id a jo y la sh g a n +q za ry a d g a t a ’sir
qiluvchi k u c h n i toping.
D
А
С
В
I_________ #_________ I_________
+q
- q
9 4 - rasm .
96
6 7 1 . 40 va - 1 0 n C z a ry a d la r b ir-b irid a n 10 sm m aso fad a
jo y la s h g a n . S iste m a m u v o z a n a td a tu ris h i u c h u n q a n d a y
u c h in c h i zaryad olish va uni qayerga jo y lash tirish lozim ?
6 7 2 . B ir-b irid a n 24 sm m aso fa d a jo y la sh g a n h a r biri
2 5 n C d a n b o ‘lgan ikkita za ry ad e le k tro sta tik m ay d o n hosil
qiladi. H a r qaysi za ry ad d a n 15 sm n arid ag i n u q ta g a jo y la sh
tirilgan 2 n C zaryadga bu m a y d o n q an d a y k u c h b ilan ta ’sir
qiladi (m asa la n i m a y d o n n i hosil qilay o tg an z a ry a d la r b ir xil
ishorali; h a r xil ishorali b o 'lg a n h o lla r u c h u n y eching)?
6 7 3 . B itta n u q ta g a m a h k a m la b q o ‘y ilgan, u zu n lik lari
b ir xil boMgan ikkita ipga ikkita sh a rc h a osilgan: a) sh a rc h a la r
b ir xil m assaga ega boMib, b ir xil ishorali zaryad b ila n za ry a d
lan g an va b irin ch i sh a rc h a n in g zaryadi ik k in ch i sh a rc h a n i-
k id a n k a tta ; b) s h a rc h a la rn in g z a ry ad lari b ir xil, b irin ch i
sh arch an in g m assasi esa ikkinchi sh arch an in g m assasidan katta
boMgan h o lla r u c h u n ip larn in g v e rtik a ld a n ogMsh b u rc h a k -
larini taqqoslang.
6 7 4 . Bir n u q tag a m a h k a m la b q o ‘yilgan, u zu n lik lari b ir
xil ikk ita ipga m assalari 400 m g d an boMgan ikkita b ir xil
s h a rc h a osilgan. U la r b ir xil ishorali z a ry a d la r b ilan za ry ad -
lan d i. B u n d a sh a rc h a la r b ir-b irid a n 15 sm ga q o c h ib , iplar
t o ‘g ‘ri b u rc h a k hosil qildi. H a r qaysi sh a rc h a n in g zaryadini
to p in g .
675. Bir n u q ta g a m a h k a m la b q o ‘yilgan ju d a u z u n iplarga
osilgan ikk ita b ir xil stan io l gilza d ars b o sh id a b ir xil ishorali
te n g z a ry a d la r b ilan z a ry a d la n d i, b u n d a g ilzalar b ir-b irid a n
ip larn in g uzunligiga q ara g a n d a ju d a k ichik b iro r m asofaga
q o c h d i. D a rs o x irid a g ilz a la r o ra s id a g i m a so fa 4 m a rta
kam aydi. H a r qaysi gilza zary ad in in g q an d ay qism i y o ‘qolgan?
G ilz a la r b ir xil m iq d o rd a zaryad y o ‘q o tg a n d eb hisoblang.
676. M ay d o n n in g b iro r n u q ta sid a 2 n C zary ad g a 0 ,4 p N
k u c h t a ’sir q ilm o q d a . S hu n u q tad ag i m a y d o n k u c h la n g a n -
ligini toping.
6 7 7 . E le k tr m a y d o n k u c h la n g a n lig i 2 кВ / m boM gan
n u q ta g a jo y lash g an 12 n C zaryadga q an d a y k u ch ta ’sir qiladi?
678. E lektron kuchlanganligi 10 кВ/ m boMgan m ay d o n d a
q a n d a y tezla n ish b ilan h ara k a tla n a d i?
7 — A . P . R i m k e v i c h
9 7
А
С
В
D
- • ----------------------- 1-------------------• ___________ I—
x
9 5 - rasm .
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