A long solenoid with diamete 4 cm is in a vaccum, and alithium nucleus (4 neutrons and 3 protons 0 is in a clockwisecircular orbit inside the solenoid. It takes 50 ns (50 x 10-9 s) forthe lithium nucleus to cmplete one orbit. An orbiting nucleus
(a) Does the current in the solenoid run clockwise orcounterclockwise? Explain, including physics diagrams
(b) what is the magnitude of the magnetic field made by the solenoid?