高考物理:静电场

A high-school physics practice set on electrostatics: Coulomb's law, electric field strength, electric potential, potential difference, and the motion of charged particles in a uniform electric field.

  • Apply Coulomb's law to the inverse-square relationship between force and distance
  • Understand that electric field strength is a property of the field independent of the test charge
  • Calculate potential difference between two points using U=W/q
  • Distinguish vector superposition of field strength from algebraic superposition of potential

高考物理专题:库仑定律、电场强度、电势、电势差、电场力做功和带电粒子在匀强电场中的基础运动。

示例问题

关于电场强度 $E$,下列说法中正确的是哪些?

查看答案

电场强度是矢量,其方向与正电荷在该点受到的电场力方向相同, 在点电荷 $Q$ 形成的电场中,某点的电场强度大小与该点到 $Q$ 的距离平方成反比

电场强度定义式为 $E = F/q$,其大小由电场本身决定,与试探电荷无关。点电荷场强公式为 $E = kQ/r^2$。

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