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.

Question

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.

anonymous · Answer

Part B
Calculate the field strength if the loops are 10 cm in diameter, have 16 turns, and carry a 1.5  A current.

anonymous · Answer

where do we have to calculate it

vincent-lyon.fr · Answer

This device is called Helmholtz coil. See: http://en.wikipedia.org/wiki/Helmholtz_coil Derivation of the field at any point on the axis of the coils begins with calculation of the field on the axis of a circular coil.