If you know ( E) at a given point, can you calculate V at that point ? If not, what further information do you need ?

Explanation

To solve the question, we need to understand the relationship between electric field (E) and electric potential (V).

### Step-by-Step Solution:

1. **Understanding Electric Field and Electric Potential**:
The electric field (E) at a point in space is related to the electric potential (V) by the equation:
\[
E = -\frac{dV}{dr}
...