@FizikaTermiz Bahodir Davlatov
@FizikaTermiz Bahodir Davlatov
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- 69 -
14. Prujinaga 100 g yuk osilgan va u daqiqasiga 120 marta
tebranadi. Prujinaning bikrligini aniqlang (N/m).
A)12 B)120 C
)16 D)40
15. Prujinaga osilgan yukning massasi 60 g ga ortganda, uning
tebranish davri 2 marta ortgan bo‘lsa, yukning dastlabki massasi
qancha bo‘ladi (g)?
A)60 B)40 C
)20 D)30
16. Prujinali mayatnik yukining massasini va tebranish
amplitudasini 4 marta orttirsak, uning tebranish davri necha marta
ortadi?
A)16 B)8 C
)2 D)4
17. Prujina uzunligini 2 marta qisqartirib, unga osilgan yuk
massasini 2 marta orttirsak uning tebranish davri qanday o‘zgaradi?
A)4 marta ortadi B)4 marta kamayadi
C)2 marta ortadi D
)o‘zgarmaydi
18. Bikrligi k
1
ga teng bo‘lgan prujinaga osilgan yuk ω
1
chastota
bilan tebransa, bikrligi k
2
=4k
1
bo‘lgan prujinaga osilgan o‘sha
yukning o‘zi qanday ω
2
chastota bilan tebranadi?
A
)ω
2
=2ω
1
B)ω
2
=4ω
1
C)2ω
2
=ω
1
D)ω
2
=ω
1
19. Massasi 4 kg bo‘lgan yuk prujinaga osilgan va T davr bilan
garmonik tebranmoqda. Davr T/2 gacha qisqarishi uchun yukning
necha kilogammini olib tashlash kerak?
A)2 B
)3 C)3,5 D)1
20. Prujina o‘ziga osilgan yuk ta’sirida vertikal vaziyatda 10 cm ga
uzaydi. Shu mayatnikning davrini toping (s).
A)2 B)0,157 C)0,314 D
)0,628
21. Elastik prujinaga osilgan yuk garmonik tebranadi. Shu yuk
huddi shunday lekin 16 marta uzun prujinaga osilsa, tebranish davri
qanday o‘zgaradi?
A)2 marta kamayadi B)2 marta ortadi
C)o‘zgarmaydi D
)4 marta ortadi
22. Parallel (yonma – yon) ulangan, bikrligi k ga teng bo‘lgan ikkita
bir xil prujinaga maxkamlangan m massali yukning tebranish
chastotasi nimaga teng bo‘ladi?
A)
m
k
2
1
p
B)
m
2
k
2
1
p
C
)
m
k
2
2
1
p
D)
m
2
k
4
1
p
23. Ketma – ket ulangan, bikrligi k bo‘lgan ikkita bir xil prujinaga
osilgan m massali yukning tebranish davri nimaga teng bo‘ladi?
A)
k
2
m
2
p
B
)
k
m
2
2
p
C)
k
m
p
D)
k
2
m
4
p
24. Prujinali mayatnik prujinasining yarmi kesib tashlansa, uning
tebranishlari chastotasi qanday o‘zgarishini toping.
A)2 marta ortadi B) 2 marta kamayadi
C
) 2 marta ortadi D)2 marta kamayadi
25. Prujina 2 marta qisqartirilib, yukning massasi 2 marta orttirilsa,
prujinali mayatnikning tebranish davri qanday o‘zgaradi?
A)4 marta ortadi B
)o‘zgarmaydi
C)2 marta ortadi D)2 marta kamayadi
26. Bikrligi 250 N/m bo‘lgan prujinaga osilgan yuk 16 s da 20
marta tebranadi. Yukning massasini toping (kg).
A)5 B)6 C
)4 D)0,5
27. Prujinali mayatnik yukining massasini va tebranish
amplitudasini 4 marta orttirsak, uning tebranish davri necha marta
ortadi?
A)16 B)8 C)4 D
)2
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