An electron is moving at a speed of 0.8 multiplied by 104 m/sin a circular path of radius of 1.9 cm inside a solenoid. The magnetic fieldof the solenoid is perpendicular to the plane of the electron'spath. The solenoid has 25 turns per centimeter.
a) Find the strength of the magnetic field inside the solenoid.
b) Find the current in the solenoid.