פרקטיקות שדה מגנטי

פרקטיקות שדה מגנטי - ערבית

65. ח.1.1

سوف نستخدم التعبير للتعبير عن مقدار الحقل المغناطيسي بالقرب من سلك مستقيم يحمل تيارًا:

$begin mathsize 20px style bold B subscript bold A bold equals fraction numerator bold mu subscript bold 0 bold times bold I over denominator bold 2 bold times bold pi bold times bold r subscript bold A 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 30 over denominator bold 2 bold times bold pi bold times bold 0 bold. bold 2 end fraction bold equals fraction numerator bold 3 bold. bold 76 bold times bold 10 to the power of bold minus bold 5 end exponent over denominator bold 1 bold. bold 256 end fraction bold equals bold 3 bold times bold 10 to the power of bold minus bold 5 end exponent bold T bold B subscript bold B bold equals fraction numerator bold mu subscript bold 0 bold times bold I over denominator bold 2 bold times bold pi bold times bold r subscript bold B 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 30 over denominator bold 2 bold times bold pi bold times bold 0 bold. bold 4 end fraction bold equals fraction numerator bold 3 bold. bold 76 bold times bold 10 to the power of bold minus bold 5 end exponent over denominator bold 1 bold. bold 256 end fraction bold equals bold 1 bold. bold 5 bold times bold 10 to the power of bold minus bold 5 end exponent bold T bold B subscript bold C bold equals fraction numerator bold mu subscript bold 0 bold times bold I over denominator bold 2 bold times bold pi bold times bold r subscript bold C 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 30 over denominator bold 2 bold times bold pi bold times bold 0 bold. bold 2 end fraction bold equals fraction numerator bold 3 bold. bold 76 bold times bold 10 to the power of bold minus bold 5 end exponent over denominator bold 1 bold. bold 256 end fraction bold equals bold 3 bold times bold 10 to the power of bold minus bold 5 end exponent bold T end style$

باختصار: في النقطتين A وC تبلغ شدة الحقل المغناطيسي 30 ميكرو تسلا. في النقطة B تبلغ قوة الحقل المغناطيسي 15 ميكرو تسلا.