An electron is moving at a speed of 1.1 multiplied by 104 m/s in a circular pathof radius of 2.1 cm inside a solenoid. The magnetic field of the solenoid is perpendicular to the plane of the electron's path. The solenoid has 25 turns per centimeter.
a) Find the strength of the magnetic fieldinside the solenoid.
b) Find the current in the solenoid.