A toroduial solenoid (see figure) has inner radius 15.4 cm and outer readius 17.7 cm. The solenoid has 300 turns and carries a current of 9.30 A.
1. What is the magnitdude of the magnetic field at 10.2 cm from the ceter of torus?
2. What is the magnitude of the magnetic field at 16.5 cm the ceter of torus?
3. What is the magnitude of the magnetic field at 20.5 .5 cm the ceter of torus?