An X-ray tube operates at `20k V`. Find the maximum speed of the electron strinking the anode , given the charge of electron is `1.6 xx 10^(-19)` coulomb and mass of electron is `9 xx 10^(-31) kg`.

Explanation

To find the maximum speed of the electron striking the anode in an X-ray tube operating at 20 kV, we can use the relationship between the kinetic energy gained by the electron and the electric potential energy provided by the potential difference.

### Step-by-Step Solution:

1. **Understanding the Energy Conversion**:
The electron gains kinetic energy (KE) when it is accelerated through a potential difference (V). The energy gained by the electron can be expressed as:
\[
KE = eV
...