导读：谁会物理专业的英语帮忙翻一下How is the current related to the potential gr 谁会物理专业的英语帮忙翻一下How is the current related to the potential gradient in conductor? If two terminal point on a conductor are held at...
谁会物理专业的英语帮忙翻一下How is the current related to the potential gr
谁会物理专业的英语帮忙翻一下
How is the current related to the potential gradient in conductor? If two terminal point on a conductor are held at a constant potential difference V, e.g., by connecting them to the electrodes of battery, then in equilibrium a steady current flows through the conductor. Let I be the current at either point, It is found that for many cases the current and potential difference are proportional, equation V=IR is Ohm’s law. The constant of proportionality R is called the resistance of the conductor. The SI unit of resistance is the ohm, 1/R is called the conductance, and its unit is Siemens. Ohm’s law holds to a very good approximation for many conductors. However, it is not a universal principle, and in sec.7.7 we will see an example where it doesn’t hold.
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如何是当前有关在导体的电位梯度?如果两个导体的终点举行恒定的电位差V时,例如,将它们连接到电池的电极,然后在平衡稳定的电流流通过导体.让我在任何一点的电流,它被发现,许多情况下,现有的和潜在的差异成正比,公式：V = IR是欧姆定律.常数相称ŕ的是被称为导体电阻.电阻的SI单位是欧姆,1/被称为电导,其单位是西门子.欧姆定律,拥有很好的逼近了许多导线.然而,这不是一个普遍的原则,在sec.7.7我们将看到一个例子,它并不持有.
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