A solenoid is formed by winding 11.0 m of insulated silver (resistivity 1.59 x 10-8 Ω·m) wire around a hollow cylinder. The turns are wound as closely as possible without overlapping and the insulating coat on the wire is negligibly thin. When the solenoid is connected to an ideal (no internal resistance) 3.00-V battery, the magnitude of the magnetic field inside the solenoid is found to be 4.69 x10-3 T. Decide the radius of the wire. Hint: As the solenoid is closely coiled, the number of turns per unit length depends upon the radius of the wire.