@FizikaTermiz Bahodir Davlatov
@FizikaTermiz Bahodir Davlatov
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- 86 -
3. Mis simning 50 ºC dagi qarshiligi 2 Ω, 100 ºC
dagi qarshiligini
(Ω) toping. Mis uchun qarshilikning termik koeffitsienti 0,004 K
–1
ga teng.
A
)2,33 B)4,6 C)1,1 D)0,5
4. Temperaturasi 0 ºC bo‘lgan alyuminiyning qarshiligi 3
marta
ortishi uchun qanday temperaturagacha qizdirish kerak (ºC).
Alyuminiy uchun qarshilikning termik koeffitsienti 4·10
–3
K
–1
ga
teng.
A)300 B)600 C
)500 D)900
5. G‘altakning mis simi 25 ºC da 11 Ω qarshilikka ega. 100 ºC
gacha isitilganda, uning qarshiligi necha Ω bo‘lishini baholang. Mis
uchun qarshilikning termik koeffitsienti 4·10
–3
K
–1
A)11 B)15 C)13 D
)14
6. 0 ºC temperaturadagi mis o‘tkazgichning qarshiligini 2 marta
orttirish uchun uning temperaturasini qanchaga ko‘tarish kerak
(ºC)? Mis uchun qarshilikning termik koeffitsienti 4·10
–3
K
–1
A
)250 B)600 C)400 D)300
7. 0 ºC temperaturada olingan volfram simining qarshiligini 3 marta
orttirish uchun uni qanday temperaturagacha qizitish kerak (ºC)?
Volfram uchun qarshilikning termik koeffitsienti 5·10
–3
K
–1
ga teng.
A)100 B)200 C)273 D
)400
8. Toza alyuminiy simning 0 ºC temperaturadagi qarshiligi 30 Ω.
Temperatura 200 ºC bo‘lganida, bu simning qarshiligi qanday
bo‘ladi (Ω)? Alyuminiy uchun qarshilikning termik koeffitsienti
4·10
–3
K
–1
A)10,8 B)9 C)18 D
)54
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