Read More
Date: 2-1-2017
2010
Date: 16-2-2017
1391
Date: 16-10-2020
1440
|
THE ELECTRIC FORCE LAW
Since electrons, protons, and neutrons make up almost everything we see around us (except for photons or light itself), a description of the electric force between these three particles provides a fairly complete picture of the electric interaction, insofar as it affects our lives. For electrons, protons, and neutrons at rest, this interaction is completely summarized in Figure (1).
As we see, protons repel each other, electrons repel each other, and a proton and an electron attract each other. There is no electric force on a neutron. The strength of the electric force between these particles drops off as 1/r 2 and has a magnitude shown in Equation 1. We know, to extremely high precision, that the attractive force between an electron and proton has the same strength as the repulsive force between two protons or two electrons, when the particles have the same separation r. It is surprising how complete a summary of the electric interaction Figure (1) represents. We have only shown the forces between the particles at rest.
But if you combine these results with the special theory of relativity, you can deduce the existence of magnetism and derive the formulas for magnetic forces.
Figure 1: The electric interaction between protons and electrons at rest. There is no electric force on a neutron.
|
|
حمية العقل.. نظام صحي لإطالة شباب دماغك
|
|
|
|
|
إيرباص تكشف عن نموذج تجريبي من نصف طائرة ونصف هليكوبتر
|
|
|
|
مدارس العميد.. بين مطالب التوسع وإمكانية القبول
|
|
قسم التطوير ينظم دورة "المهارات الأساسية لبرنامج الأكسل"للمنتسبين
|
|
في بغداد قسم الشؤون الفكرية يشارك في تكريم مجموعة من الطالبات المتفوقات
|
|
العتبة العباسية تكرم الفائزين في مسابقة ذكرى ولادة الإمام الرضا (عليه السلام)
|