magnetic field therapy is used to treat all sorts of ailments in humans for soft tissues and born damage. a magnetic field generator which consists of a coil of wire is placed around the person to be treated. the generator can produce a field of 0.014 T inside a simple solenoid Coil when a current of 1.2 A runs through it. if the coil has a diameter of 0.40 m and has a total length of 0.20 mm, calculate the length of the wire used to make the coil​.