A A点的电场强度大于B点的电场强度 B A点的电势小于B点的电势 C 负电荷在A点的电势能小于在B点的电势能 D 把正电荷从B点移到A点时，电场力做功为正值 <img src="https://www.beizhujiaoyu.com/uploads/202208/20130108160737483748.jpg" alt="" border="0" />

A <img src="https://www.beizhujiaoyu.com/uploads/202208/20130108160834043404.gif" alt="" border="0" /> B <img src="https://www.beizhujiaoyu.com/uploads/202208/20130108160841814181.gif" alt="" border="0" /> C <img src="https://www.beizhujiaoyu.com/uploads/202208/20130108160888038803.gif" alt="" border="0" /> D <img src="https://www.beizhujiaoyu.com/uploads/202208/20130108160845654565.gif" alt="" border="0" />

A <img src="https://www.beizhujiaoyu.com/uploads/202208/20130108160855065506.gif" alt="" border="0" /> B <img src="https://www.beizhujiaoyu.com/uploads/202208/20130108160881658165.gif" alt="" border="0" /> C <img src="https://www.beizhujiaoyu.com/uploads/202208/20130108160840804080.gif" alt="" border="0" /> D <img src="https://www.beizhujiaoyu.com/uploads/202208/20130108160859965996.gif" alt="" border="0" />

A 导体中电荷运动就形成电流 B 电流强度是矢量 C 电流强度的单位是基本单位 D <img src="https://www.beizhujiaoyu.com/uploads/202208/20130108161728272827.gif" alt="" border="0" />

A <img src="https://www.beizhujiaoyu.com/uploads/202208/20130108161715901590.gif" alt="" border="0" /> B <img src="https://www.beizhujiaoyu.com/uploads/202208/2013010816170715715.gif" alt="" border="0" /> C 比较几只电阻的I—U图像可知，电流变化相同时，电压变化较小的，电阻值大 D 导体的电流越大，电阻就越小

A a B b C C D d<img src="https://www.beizhujiaoyu.com/uploads/202208/2013010816170263263.jpg" alt="" border="0" />

A 等于484Ω B 大于484Ω C 小于484Ω D 无法确定

A 1：1：1 B 2：1：1 C 1：2：2 D 4：1：1<img src="https://www.beizhujiaoyu.com/uploads/202208/20130108161778877887.jpg" alt="" border="0" />

A 开关S未接通 B 滑动变阻器R断开 C <img src="https://www.beizhujiaoyu.com/uploads/202208/20130108161827522752.gif" alt="" border="0" /> D <img src="https://www.beizhujiaoyu.com/uploads/202208/20130108161820952095.gif" alt="" border="0" />

A <img src="https://www.beizhujiaoyu.com/uploads/202208/20130108161841614161.gif" alt="" border="0" /> B <img src="https://www.beizhujiaoyu.com/uploads/202208/20130108161829522952.gif" alt="" border="0" /> C <img src="https://www.beizhujiaoyu.com/uploads/202208/20130108161854655465.gif" alt="" border="0" /> D <img src="https://www.beizhujiaoyu.com/uploads/202208/20130108161848804880.gif" alt="" border="0" /><img src="https://www.beizhujiaoyu.com/uploads/202208/20130108161831473147.jpg" alt="" border="0" />