If a proton moves through a potential difference of 4.5 kV,what is the magnitude of the change in the proton's potential energy expressed in the unit electron-volt ?

Explanation

To solve the problem of finding the change in potential energy of a proton moving through a potential difference of 4.5 kV, we can follow these steps:

### Step 1: Understand the relationship between charge, potential difference, and potential energy.
The change in potential energy (ΔU) can be calculated using the formula:
\[ \Delta U = Q \cdot \Delta V \]
where:
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