How much kinetic energy will an electron gain (in joules and eV) if it accelerates through a potential difference of 23,000 V in a TV picture tube?

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An electron has a charge `q=-1.6xx10^(-19)C`

Voltage is defined as the electric potential energy per charge i.e

Voltage is defined as the electric potential energy per charge i.e

`V=(PE)/q`

Therefore,

`PE=qV`

This energy is converted to KE as it accelerates.

`KE=1.6xx10^(-19)xx23000 J`

``

`=3.68xx10^(-15) J`

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