电势的正负
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2\u3001\u6839\u636e\u68c0\u9a8c\u7535\u8377\u5224\u65ad\uff1a\u7535\u573a\u529b\u5bf9\u7535\u8377\u505a\u6b63\u529f\u65f6\uff0c\u7535\u8377\u7684\u7535\u52bf\u80fd\u51cf\u5c11\uff0c\u7535\u573a\u529b\u5bf9\u7535\u8377\u505a\u8d1f\u529f\uff0c\u7535\u8377\u7684\u7535\u52bf\u80fd\u589e\u52a0\u3002
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电势是标量,电势的正负主要看的是所选取的参考点,正负表大小,正就是比参考点大,负就是比参考点小 ,电势是由电场本身决定,电势=Ep/q这是定义式不是决定式 ,电势与电荷的正负无关电势是标量,只有大小,没有方向。电势可以为正也可以为负。这个式子是标量式,若Ep为负,q为正,则电势为负。是这样的, 你说的是对的、
电势的正负主要看的是你所选取的参考点,就像一块电路板上的“地”一样,只是认为选取的零点电位。
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