(1)10 3V/m (2)-50V (3)1.2×10 5pF
(1)对A点受力分析:
Eq="mg" 得E = 10 3V/m
(2)U NM="Ed" = -50V
U NM=f N-f M得f M= -50V
(3)C="Q/U" = 1.2×10 -7F=1.2×10 5pF
(1)10 3V/m (2)-50V (3)1.2×10 5pF
(1)对A点受力分析:
Eq="mg" 得E = 10 3V/m
(2)U NM="Ed" = -50V
U NM=f N-f M得f M= -50V
(3)C="Q/U" = 1.2×10 -7F=1.2×10 5pF