A circular coil has a 8.57 cm radius and consists of 29.0 closelywound turns of wireAn externally produced magneticfleld of magnitude 3.85 mT is perpendicularto the coil. [3] If no current is in the coil,what magneticflux links its turns? [b] When the current in the coil is 3.91 A in a certain direction,the netflux through the coil is found to vanish.What is the inductance of the coil? {a} Number Units v_ [bl Number n Units v