如图所示o点有正电荷q以o为圆心的三个同心圆的半径分别为oa=r0b=2roc=3r将一负电荷q由a移到b克服电场力做功为w1由b Template




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tomski如图所示o点有正电荷q以o为圆心的三个同心圆的半径分别为oa=r0b=2roc=3r将一负电荷q由a移到b克服电场力做功为w1由b coloring