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Electrons are caused to fall through a p...

Electrons are caused to fall through a potential difference of 1500 volts. If they were initially at rest. Then calculate their final speed.

Text Solution

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The electrical potential energy is converted into kinetic energy. If v is the final speed then
`(1)/(2) mv^(2) =`eV
` v = sqrt((2eV)/(m)) = sqrt((2xx 1.6 xx 10^(-19)xx 1500)/(9.1xx 10^(-31))) = 2.3 xx 10^(7) ms^(-1)`
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