The maximum kinetic energy of a photoelectron is 3 eV. What is its stopping potential ?

Explanation

To find the stopping potential when the maximum kinetic energy of a photoelectron is given, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the relationship between kinetic energy and stopping potential**:
The maximum kinetic energy (KE) of a photoelectron can be expressed in terms of the stopping potential (V₀) using the equation:
\[
KE = e \cdot V_0
...