如图所示的匀强磁场,磁感应强度为0.2T,通电直导线与磁场方向垂

如图所示的匀强磁场,磁感应强度为0.2T,通电直导线与磁场方向垂直,导线长度为0.2m,导线中电流为1A 该导线所受安培力的大小为(  

A0.01N    B0.02N     C0.03N      D0.04N

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