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    speed of the electron hitting the screen in TV picture tube

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    In a television picture tube, electrons strike the screen after being accelerated from rest through a potential difference of 25000 V. The speeds of the electrons are quite large, and for accurate calculations of the speeds, the effects of special relativity must be taken into account. Ignoring such effects, what is the electron speed just before the electron strikes the screen?

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    Solution Summary

    By ignoring the special relativity effect, the solution applies work-energy theorem to calculate the speed of the electron, which is accelerated by a electric field, when it hits the screen in the TV picture tube.