sat physics (electric potential) help!
a parallel plate capacitor is charged to a potential difference of V,this results in a charge of +Q on one plate and a charge of -Q on the other.The capacitor is disconnected from the charging source,and a dielectric is then inserted.what happens to the potential difference and the stored electrical potential energy?
用decrease increase,unchange來回答
potential difference 和 stored elextrical potential energy是什么區(qū)別嗎?
which points in the uniform electric field between the plates of the capacitor lie on the same equipotential?(圖是一個(gè)capacitor,上面有4個(gè)點(diǎn),兩個(gè)是和capacitor平行,還有兩個(gè)是和capacitor垂直) 答案是那兩個(gè)和capacitor平行的點(diǎn),為什么?他不是說是uniform electri field嗎?那不應(yīng)該是4個(gè)點(diǎn)的電壓都該是一樣的?
由于本人理解能力有限,就當(dāng)我是一個(gè)初中生= =