1-labоratоriya ishi

3-rasm

2- rasmdan H=H₀tg deb yozish mumkin. Formula (1) ni etiborga olib quyidagiga ega bo’lamiz :H₀tg =nI/2r; (3) yoki H₀=nI/2r tg (4)

Ifoda (4)dan 2rH₀/n ni C deb belgilab olamiz .

C=2rH₀/n (5)

Tok kuchi I va enkayish burchagining tangensini bilib ,ifoda (5) dan tangens –galvonometr doimiysini aniqlash mumkin :

I=Ctg (6) C=I/tg … (7)

Tangens -galvonometr aylanasi bo’ylab bir necha o’ram sim o’ralgan katta diametrli doirali yog’och karkasdan iborat . Karkas markazidan g’ilof ichida gorizontal tekislikda erkin aylana oladigan magnit strelka joylashgan .Strelkani arretirdan shisha qutichadagi mahsus richagni burash yo’li bilan osongina bo’shatish mumkin. Tangens -galvonometrning shemaga ulanishi (4) –rasmda ko’rsatilgan .Bu yerda T - tangens -galvonometr, P –pereklyuchatel, R – reostat, A –ampermetr , E –o’zgarmas tok manbai ,K –kalit.