A circular coil has a 10cm radius and consists of 30 closely wound turns of wire. An externally produced magnetic field of magnitude 2.6mT is perpendicular to the coil. (a) If no current is in the coil, what magnetic flux links its turns? (b) When the current in the coil is 3.8A in a certain direction, the net flux through the coil is found to vanish. What is the inductance of the coil?I've tried this problems 3 different times and got 3 different answers which were all wrong! So, any help would be awesome. (:Also, thanks to anyone who helps. :D
(a) r 0.1m areapi*r*r 0.03141 Flux N*B*A Cos 0 0.000081666T (b) Flux L*I 0.000081666T L 0.000081666T/ 3.8 0.000021491052632H
