A Cathode Ray Tube
The figure shows a simplified model of a cathode-ray tube (CRT). Electrons are emitted from a hot filament with zero initial speed at the negative plate of a parallel-plate capacitor. The electric field accelerates the electrons toward the positive plate, where they exit the capacitor with speed v_(1). They then enter a deflector that uses an electric field to steer the electrons in a particular direction, bending their trajectory by an angle \theta .
A If the electrons are designed to leave the electron gun with a speed of 6.0\times 10^(7)(m)/(s), what electric field strength must the electron gun's capacitor have?
B If the deflector's electric field strength is 1.5\times 10^(5)(N)/(C), by what angle \theta are the electrons deflected?