• 2022-05-26
    长[tex=4.214x1.0]RzB3/GF7R4sBwM8Z9qqhcw==[/tex]的直导线[tex=1.571x1.0]mCjAngcIqtveplNftuY0BQ==[/tex]上,设想均匀地分布着线密度[tex=9.143x1.357]0WN4LRZSsaFbXcsix/4HuC8B4WuJcNBFdvnh4OIK7hizstw9yL9rKiEUJx6ZrUxw[/tex]的正电荷. 求在导线的延长线上与导线[tex=0.786x1.0]sHo1pKm+gjxjcUAJjHrarQ==[/tex]端相距[tex=4.286x1.214]pnKp0PrC/IGJMz4V07Xwxg==[/tex]处[tex=0.643x1.0]WUJ/JHItsc3Bqx1WYNJcrg==[/tex]点的场强;
  • 举一反三