一个半径为r的薄�属球壳,带有电荷q,壳内充满相对介电常量为εr的各�同性均匀电介质。设无穷远处为电势零点,则球壳的电势u=( )。a、a b Template




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tomski一个半径为r的薄�属球壳,带有电荷q,壳内充满相对介电常量为εr的各�同性均匀电介质。设无穷远处为电势零点,则球壳的电势u=( )。a、a b coloring