Answers

2014-12-02T16:54:00+05:30
The limit of our visualization techniques prevent us from really seeing an electron this can be the reason prevent us to see the electron
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2014-12-02T17:10:04+05:30
Electron is a sub atomic particle. the size of electron is much less than 10^-18 metres which is much less as compared to our vision accommodation. Therefore we cannot see an electron in a wire. 
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