An electron beam accelerated from rest through a potential difference of 5000 V in vacuum is allowed to impinge on a surface normally. The incident current is 50 mu A and if the electrons
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An electron beam accelerated from rest through a potential difference of 5000 V in vacuum is allowed to impinge on a surface normally. The incident current is 50 mu A and if the electrons An electron beam accelerated from rest through a potential difference of 5000 V in vacuum is allowed to impinge on a [...]