Two identical coils are parallel to each other on the same axis. They are separated by a distance equal to their radius . They each have turns and carry equal currents in the same direction.

Part A
Find an expression for the magnetic field strength at the midpoint between the loops.
Express your answer in terms of the variables R,N ,I , and appropriate constants.
=

Part B
Calculate the field strength if the loops are 10CM in diameter, have 16 turns, and carry a 1.5A current.
Express your answer using two significant figures.