A.50 V                                                                   B.500 V

C.5 000 V                                                              D.50 000 V

A.k                                                               B.k

C.                                                                   D.

A.电容逐渐增大

B.极板间场强逐渐增大

C.极板间电压保持不变

D.极板上电荷量保持不变

A.Q变大                                                 B.C变大

C.E变小                                                 D.U变小

A.跟两极板的正对面积S有关，S越大，C越大

B.跟两极板的间距D有关，D越大，C越大

C.跟两极板上所加电压U有关，U越大，C越大

D.跟两极板上所带电荷量Q有关，Q越大，C越大

A.B板向上移，静电计张角减小

B.B板向右移，静电计张角减小

C.极板间插入玻璃板，静电计张角减小

D.使A板放走部分电荷，静电计张角减小

A.电容器的电容C变大

B.电容器极板的带电荷量Q变大

C.电容器两极间的电势差U变大

D.电容器两极板间的电场强度E变大