تبلیغات
آموزش الكترونیك - مدارات سری و موازی
چهارشنبه 4 خرداد 1390  22:28
نوع مطلب: (الكترونیك ،) توسط: محمد آزاد

اجزاء مدار الکتریکی می‌تواند به طرق مختلفی به هم متصل شوند. ساده ترین آنها اتصالات سری و موازی هستند. در اتصال سری قطعات پشت سر هم در یک خطی قرار داده میشوند بگونه‌ای که جریان عبوری از همه اجزای سازنده یکسان خواهد بود.مانند شكل زیر:

اگر چند مقاومت بصورت سری به همدیگر متصل شوند مقاومت كلی مدار از حاصل جمع آنها بدست می اید:

RT=R1+R2+R3+...RN

جریان كل مدار ثابت است:

It=I1=I2=I3=...=IN

ولتاژ دو سر هر مقاومت از رابطه زیر بدست می آید:

V=R*I

ودر اتصال موازی ولتاژ اعمال شده به همه اجزای سازنده یکسان خواهد بود.  


اگر چند مقاومت بصورت موازی به یكدیگر متصل شوند مقاومت كل مدار از رابطه زیر بدست می آید:

ولتاژ دوسر هر مقاومت با هم برابر است و مساوی است با ولتاژ كل مدار:

V=VR1=VR2=VR3=....=VRn

جریان عبوری از هر مقاومت  از رابطه زیر بدست می آید:

جریان مقاومت مورد نظر=ولتاژ دوسر مقامت تقسیم بر مقاومت مورد نظر   I=V/R


  • آخرین ویرایش:چهارشنبه 4 خرداد 1390
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