2-курс Физика

Oraliq nazorat №1  Nazorat shakli: Test

1.     Elektr tokining magnit ta`siri tok qaysi muhitlardan o`tganda kuzatiladi?

A) elektrolitlardan;                                 B) metallardan;

C) vakuumdan;                                       D) istalgan muhitdan.

2. Magnit oqimining birligini ko`rsating.

A) Tesla;                                                  B) Veber;

C) Amper;                                                D) Ersted.

3. O`tkazgichdan o`zgarmas tok o`tganda uning atrofida qanday maydon hosil bo`ladi?

A) Elektr maydon;                                    B) Magnit maydon;

C) Elektroagnit maydon;                           D) Gravitatsion maydon.

4. Rasmda 4 juft tok o`tish yo`nalishlari tasvirlangan. Qaysi holda ular o`zaro tortishadi?

A)                                           B)

C)                                                              D)

5.  Rasmda 4 juft tok o`tish yo`nalishlari tasvirlangan. Qaysi holda ular o`zaro itarishadi?

A)                                           B)

C)                                                              D)

6. Magnit maydonda joylashtirilgan yuzasi 0,05m² bo`lgan tokli ramkadan 2A tok o`tmoqda. Agar ramkani aylantiruvci maksimal kuch momenti 40mN*m bo`lsa, ramka joylashgan maydonning induksiyasi nimaga teng?                

A) 4π*^10-6 T                                                     B) 6π*^10-6 T

C) 2π*^10-6 T                                                     D) 8π*^10-6 T

7. Radiusi 4 cm bo`lgan sim halqadan 0,8 A tok o`tmoqda. Halqa markazidagi magnit induksiyasini aniqlang.

A) 2T ;                                                             B) 0,4 T

C) 0,5 T                                                           D) 0,2 T

8. Induksiyasi 0,1 T bo`lgan magnit maydon hiziqlariga tik joylashgan 25 cm uzunlikdagi o`tkazgichga maydonning ta`sir kuchi 0,5 N ga teng. O`tkazgichdan o`tayotgan tok kuchi nimaga teng ?

A) 2,5 A ;                                                        B) 0,4 A ;

C) 1,25 A;                                                        D) 0,2 A.

9. Magnit maydon induksiya chiziqlariga tik yo`nalishda elektron va proton uchib kirmoqda. Protonning massasi elektronning massasidan 1800 marta katta. Zaralarning qaysi biriga ta`sir ko`rsatgan Lorens kuchi katta bo`ladi?

A) elektronga;                                                  B) protonga;

C) ikalasiga bir xil;                                           D) ta`sir kuchi 0 ga teng.

10. Chap qo`l qoidasi yordamida qanday kattaliklarning yo`nalishi aniqlanadi?

A) Amper kuchi;                                                 B) Lorens kuchi;

C) Amper va Lorens kuchlari;                           D) induksion tok yo`nalishi.

11. Quyidagi keltirilgan kuchlarning qaysi biri ish bajaraydi?

A) Amper kchi;                                                 B) Lorens kuchi;

C) Kulon kuchi;                                                D) Ishqalanish kuchi.

12. Lorens kuchi harakatdagi zaryadli zarraning tezligini qanday o`zgartiradi?

A) ortiradi;                                                        B) kamaytiradi;

C) o`zgartirmaydi;                                             D) yo`nalishini o`zgartiradi.

13. Lorens kuchi ifodasini ko`rsating.

A) F=mʋ²/R ;                                                    B) F=I*B*l*sinα;

C) F=µ₀*(I₁*I₂/2π*d)*∆I;                                 D) F=q*ʋ*Bsinα.

14. Proton induksiyasi 40mT bo`lgan bir jinsli magnet maydon kuch chiziqlariga tik holda 2*10⁷m/s tezlik bilan uchib kirganda u qanday radiusli aylana chizadi (m_p=1,67*10^{-27 kg)?}

A) 1,5 cm;                                                           B) 4cm;

C) 2,5 cm;                                                            D) 5,2 cm.

15. Bir jinsli magnet maydonga tik uchib kirgan elektronning aylanish davri 20*10^-12 s bo`lsa, magnet maydon induksiyasini aniqlang (T).

A) 1,5;                                                                   B) 1,8;

C) 2,5;                                                                  D) 3,2.