Solenoids produce magnetic fields that are relatively intense for the amount of current they carry. To make a direct comparison, consider a solenoid with 48.0 turns per centimeter, a radius of $1.27 \mathrm{~cm},$ and a current of $0.776 \mathrm{~A}$. (a) Find the magnetic field at the center of the solenoid. (b) What current must a long, straight wire carry to have the same magnetic field as that found in part (a)? Let the distance from the wire be the same as the radius of the solenoid, $1.27 \mathrm{~cm}$.