高二物理 求問等量點(diǎn)電荷電場(chǎng)線的中垂線上電場(chǎng)力和電勢(shì)變化情況?!
等量正點(diǎn)電荷電場(chǎng)線的中垂線上電場(chǎng)力由中點(diǎn)向上下兩邊____(遞減/遞增/先大后小/先小后大)；電勢(shì)由中點(diǎn)向上下兩邊____(同上).
等量負(fù)點(diǎn)電荷電場(chǎng)線的中垂線上電場(chǎng)力由中點(diǎn)向上下兩邊____(同上)；電勢(shì)由中點(diǎn)向上下兩邊____(同上).
等量異種點(diǎn)電荷電場(chǎng)線的中垂線上電場(chǎng)力由中點(diǎn)向上下兩邊____(同上)；電勢(shì)由中點(diǎn)向上下兩邊____(同上).