If an electron loses 2.5E-15 J of energy in travelling from the cathode to the screen in a home computer,across what potential difference must it travel?
人气：496 ℃ 时间：2020-03-24 01:39:48
解答
“电势”升高,电势差为：
U=W/q=(2.5E-15)J/(1.6E-19)C=15625V=15.625KV
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