A certain solenoid (50cm long with 2000 loops) carries a current of 0.7A and is in vacuum . An electron is shot at an angle of 10° to the solenoid axis from a point on the axis , what must be the speed of the electron if it is to just miss hitting the inside of the 1.6cm diameter solenoid.​

An electron moves with a constant horizontal velocity of 3.0 × 106 m/s and no initial vertical velocity as it enters a deflector inside a tv tube. the electron strikes the screen after traveling 26 cm horizontally and 19 cm vertically upward with no horizontal acceleration. what is the constant vertical acceleration provided by the deflector? (the effects of gravity can be ignored.)