A.電場(chǎng)能正在向磁場(chǎng)能轉(zhuǎn)化 B.磁場(chǎng)能正在向電場(chǎng)能轉(zhuǎn)化 C.電場(chǎng)能向磁場(chǎng)能轉(zhuǎn)化剛好完畢 D.電場(chǎng)能正在向電場(chǎng)能轉(zhuǎn)化
A.P1>P2>P3 B.P1=P2=P3 C.P1<P2<P3 D.P1=P2>P3