Question 58
Bb/Ba? What is the ratio mu a/ mu b of the dipole moment magnitudes of the coils? What is the magnitude of the magnetic dipole moment fl of the solenoid described in Problem 49? Figure 29-73 shows an arrangement known as a Helmholtz coil. It consists of two circular coaxial coils, each of 200 turns and radius K = 25.0 cm. separated by a distance s = R. The two coils carry equal currents i = 12.2 mA in the same direction. Find the magnitude of the net magnetic field at P, mid-way between the coils.