A loop of diameter d is rotated in a uniform electric field until the position of maximum electric flux is found. The flux in this position is measured to be \[\phi .\] What is the electric field strength?

• A. \[\frac{4\phi }{\pi {{d}^{2}}}\]
• B. \[\frac{2\phi }{\pi {{d}^{2}}}\]
• C. \[\frac{\phi }{\pi {{d}^{2}}}\]  
• D. \[\frac{\pi \phi {{d}^{2}}}{4}\]