A circular coil of `'n'` turns is kept in a uniform magnetic fielf such that the plane of the coil is perpendicualr to the field. The magnetic flux associated with the coil is now `phi`. Now the coil is opened and made inot another circular coil od twice radius of the pervious coil and kept in the same field such that the plane of the coil is perpendicular to the field. The magnetic flux associated with this coil now is