An electron ismoving at a speed of 1.2 104 m/sin a circular path of radius of 1.9 cminside a solenoid. The magnetic field of the solenoid isperpendicular to the plane of the electron's path. The solenoid has25 turns per centimeter.
(a) Find the strength of the magnetic field inside the solenoid.
T
(b) Find the current in the solenoid.
mA