Kafedrasi «Elektr injenering»

Masalalar

4.1-masala.

Keltirilgan zanjirda (4.1 – rasm) E₁=250V, E₂=220V, R₁=5om, R₂=8om, R₃=10om, r₀₁=0,02om, r₀₂=0,02om. Zanjirdagi toklarni aniqlang.

4.2-masala.

4.2 – rasmdagi sxemada E₁=120v, E₂=110v, R₁=2om, R₂=2om, R₃=4om. Toklarni toping.

4.1 – rasm 4.2–rasm

4.3-masala.

Kuchlanishi U=115v bo’lgan liniyaga quvvati ‘₁=3,5kvt bo’lgan elektrodvigatelg’ va quvvati ‘₂=2,3kvt bo’lgan elektropechka ulangan. Liniyadagi tokning kuchini aniqlang.

4.4-masala.

Quvvati ‘₁=100vt va kuchlanishi U=220v bo’lgan cho’g’lanma lampochkaning qarshiligini aniqlang. Parallel ulangan yigirmata ana shunday lampochkaning qarshiligini aniqlang.

4.5-masala.

4.5 – rasm

4.5 – rasmda tasvirlangan zanjirning barcha uchastkalaridagi toklar va kuchlanishlar topilsin. Zanjirning qisqichlaridagi kuchlanish U_AG=210v. qarshiliklar r₁=0,6om, r₂=4om, r₃=3,5om, r₄=2,5om.
4.6-masala.

Agar E₁=123v, E₂=115v, r₁=0,15om, r₂=0,5om, r₃=12om, bo’lsa (4.6 – rasm), I_1, I_2, I_3, toklar topilsin.

4.6 - rasm
4.7-masala.

Agar E₁=40v, E₂=90v, E₃=60v, R₁=4om, R₂=5om, r₂=0,5om, r₀₂=1om ga teng bo’lsa, 4.7 – rasmda ko’rsatilgan zanjirdagi tok kuchi topilsin. Birinchi va uchinchi manbalarning ichki qarshiliklari juda xam kichik bo’lgani uchun ularni hisobga olmasa xam bo’ladi.

4
.7 – rasm