פרקטיקות שדה מגנטי - ערבית

90. י.3.1

نحسب شدة الحقل المغناطيسي داخل الملف الطويل:


begin mathsize 20px style bold B bold equals fraction numerator bold mu subscript bold 0 bold times bold I bold times bold N over denominator bold L end fraction bold equals fraction numerator bold 4 bold times bold pi bold times bold 10 to the power of bold minus bold 7 end exponent bold times bold 4 bold times bold 400 over denominator bold 0 bold. bold 2 end fraction bold equals fraction numerator bold 2 bold. bold 01 bold times bold 10 to the power of bold minus bold 3 end exponent over denominator bold 0 bold. bold 2 end fraction bold equals bold 0 bold. bold 01 bold T end style