请问电量Q乘电压U得到电势能E的单位是ev还是焦耳 eV（电子伏特，能量单位）和J（焦耳）怎样换算
\u8bf7\u95ee\u7535\u91cfQ\u4e58\u7535\u538bU\u5f97\u5230\u7535\u52bf\u80fdE\u7684\u5355\u4f4d\u662fev\u8fd8\u662f\u7126\u8033\u5982\u679c\u7535\u91cf\u4f7f\u7528\u7684\u662f\u5143\u7535\u8377e\u4f5c\u5355\u4f4d\uff0c\u5f97\u5230\u7684\u80fd\u91cf\u5355\u4f4d\u5c31\u662fev\uff0c\u6bd4\u59825e\u00b72v=10ev\uff1b
\u3000\u3000\u5982\u679c\u7535\u91cf\u4f7f\u7528\u7684\u662f\u5e93\u4ed1\u5355\u4f4d\uff0c\u5f97\u5230\u7684\u80fd\u91cf\u5355\u4f4d\u5c31\u662f\u7126\u8033\uff0c\u6bd4\u59821C\u00b72v=2J\u3002
\u3000\u3000\u7ea0\u6b63\u4f60\u63d0\u95ee\u7684\u9519\u8bef\uff1a\u7535\u91cf\u4e58\u4ee5\u7535\u538b\u662f\u6307\u7535\u573a\u529b\u505a\u7684\u529f\uff0c\u5b83\u7b49\u4e8e\u7535\u52bf\u80fd\u7684\u53d8\u5316\uff0c\u7535\u91cf\u4e58\u4ee5\u7535\u52bf\u624d\u7b49\u4e8e\u7535\u52bf\u80fd\u3002
1ev=1.6x10^-19j\u3002
\u6839\u636e\u7535\u529f\u8ba1\u7b97\u516c\u5f0fW=qU,\u5728\u56fd\u9645\u5355\u4f4d\u5236\u4e2d\uff0c\u7535\u91cf\u5355\u4f4dc\uff0c\u7535\u538b\u5355\u4f4d v\uff0c1j=1cv, \u7535\u91cf\u5e38\u7528\u5355\u4f4de 1e=1.6x10^-19c\uff0c1ev=1.6x10^-19j\u3002
\u7535\u5b50\u4f0f\u7279\uff08electron volt\uff09\uff0c\u7b26\u53f7\u4e3aeV\uff0c\u662f\u80fd\u91cf\u7684\u5355\u4f4d\u3002\u4ee3\u8868\u4e00\u4e2a\u7535\u5b50\uff08\u6240\u5e26\u7535\u91cf\u4e3a1.6\u00d710-19C\u7684\u8d1f\u7535\u8377\uff09\u7ecf\u8fc71\u4f0f\u7279\u7684\u7535\u4f4d\u5dee\u52a0\u901f\u540e\u6240\u83b7\u5f97\u7684\u52a8\u80fd\u3002
\u7535\u5b50\u4f0f\u7279\u4e0eSI\u5236\u7684\u80fd\u91cf\u5355\u4f4d\u7126\u8033\uff08J\uff09\u7684\u6362\u7b97\u5173\u7cfb\u662f1 eV = 1.602176565(35)\u00d710-19 J
\u6269\u5c55\u8d44\u6599\uff1a
\u4e00\u4e2a\u7535\u5b50\u53ca\u4e00\u4e2a\u6b63\u5b50\uff08\u7535\u5b50\u7684\u53cd\u7c92\u5b50\uff09\uff0c\u90fd\u5177\u6709\u80fd\u91cf\u5927\u5c0f\u4e3a 511 keV \uff0c\u80fd\u5bf9\u649e\u6bc1\u706d\u4ee5\u4ea7\u751f 1.022 MeV \u7684\u80fd\u91cf\u3002\u8d28\u5b50\uff0c\u4e00\u4e2a\u6807\u51c6\u7684\u91cd\u5b50\uff0c\u5177\u6709\u80fd\u91cf 0.938 GeV \u3002
1 eV/c² = 1.783\u00d710-36 kg
1 keV/c²= 1.783 \u00d710-33 kg
1 MeV/c² = 1.783\u00d710-30 kg
1 GeV/c²= 1.783 \u00d710-27kg
\u82e5\u505a\u4e2a\u6bd4\u8f83\uff0c\u6838\u7206\u4e2d\u5e26\u7535\u7c92\u5b50\u7684\u80fd\u91cf\u8303\u56f4\u7ea6\u5728 0.3 \u81f3 3 MeV \u3002\u5927\u6c14\u4e2d\u5206\u5b50\u7684\u80fd\u91cf\u7ea6\u4e3a 0.03 eV \u3002
\u53c2\u8003\u8d44\u6599\u6765\u6e90\uff1a\u767e\u5ea6\u767e\u79d1-\u7535\u5b50\u4f0f\u7279
如果电量使用的是库仑单位，得到的能量单位就是焦耳，比如1C·2v=2J。
纠正你提问的错误：电量乘以电压是指电场力做的功，它等于电势能的变化，电量乘以电势才等于电势能。
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