如图dgjc08所示,当改变电阻R时,测得电压和电流的关系如图(b)所示,则电源的电动势E为5V和内电阻r为0.83Ω。图<img alt="/upload/photos/20190626/63dd87b8030e4b7e96e86ec3945c327f.png" src="/upload/photos/20190626/63dd87b8030e4b7e96e86ec3945c327f.png" />
A.正确 B.错误正确答案A
如图dgjc08所示,当改变电阻R时,测得电压和电流的关系如图(b)所示,则电源的电动势E为5V和内电阻r为0.83Ω。图<img alt="/upload/photos/20190626/63dd87b8030e4b7e96e86ec3945c327f.png" src="/upload/photos/20190626/63dd87b8030e4b7e96e86ec3945c327f.png" />
A.正确 B.错误正确答案A