How much kinetic energy has an electron, Physics

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In a vacuum tube, electrons accelerate from the cathode element to the plate element, which is maintained at a positive potential with respect to the cathode. If the plate voltage is +240 V.

How much kinetic energy has an electron acquired when it reaches the plate?

 

The kinetic energy gained by an electron is the same as the potential energy lost by the electron as it moves by the potential difference of 240 V.

 


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