A ring of diameter d is rotated in a uniform electric field until the position of maximum electric flux is found. The flux is found to be `phi`. What is the electric field strength?

Explanation

To find the electric field strength when a ring of diameter \( d \) is rotated in a uniform electric field until the position of maximum electric flux is found, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Electric Flux Formula**:
The electric flux \( \Phi \) through a surface is given by the formula:
\[
\Phi = \mathbf{E} \cdot \mathbf{A} = E A \cos \theta
...