题目

英语翻译
1.calculate the capacitance of a parallel-plate capacitor with plates is partially filled with a dielectric slab S but of thickness t>r meters long carrying a current increases at the rate dI/dt,what is the magnitude and direction of the force on the electron?Disregard the field due to the rest of the circuit.
电磁学的题目

提问时间：2021-03-03

答案

1.calculate的平行板电容器的电容板部分填充介质板的厚度T＜忽视但边缘效应.
2.用毕奥-萨伐尔定律计算磁B在一个正方形的电流承载电流即中心
3.电子静止在真空在距离r从轴的导线1＞＞R米长的承载电流增加率di/dt,对电子的力的大小和方向是什么?不顾场由于其余的电路.