A beam of electrons traveling horizontally with an initial speed of v, = 3.0 x 10' m/s enters a uniform, vertically upward electric field with magnitude E = 2.0 × 10* N/C between the deflection plates of an oscilloscope, as shown in the figure. The initial velocity of the electrons is perpendicular to the field. The plates are d = 4.0 cm long. Ignoring all forces apart from the electrostatic interactions, calculate the magnitude and direction of the velocity of the electrons after passing though the plates. %3D

A pair of vertical charged conducting plates produces a uniform field of 1.1 Nî, directed to the right, between the plates. The separation of the kN plates is 40mm. An electron is projected from plate A, directly towards plate B, with an initial velocity of 6.38 Mm. Determine the velocity of the electron as it strikes plate B (in S Mm) S A E Vo 40 mm B

A proton is initially moving to the right when it enters a uniform electric field directed upwards. Which trajectory shown below will the proton follow? p V AX AY KE W AZ O trajectory Z trajectory W O trajectory Y O trajectory X

The ink drops have a mass mmm = 1.00×10−11 kg each and leave the nozzle and travel horizontally toward the paper at velocity v = 15.0 m/s. The drops pass through a charging unit that gives each drop a positive charge q by causing it to lose some electrons. The drops then pass between parallel deflecting plates of length D0D0D_0 = 2.15 cm, where there is a uniform vertical electric field with magnitude E = 7.70×104 N/C.  1) If a drop is to be deflected a distance d = 0.340 mmmm by the time it reaches the end of the deflection plate, what magnitude of charge q must be given to the drop? Assume that the density of the ink drop is 1000 kg/m3 , and ignore the effects of gravity.

An electron with a speed of 5.63 × 108 cm/s in the positive direction of an x axis enters an electric field of magnitude 1.81 × 103 N/C, traveling along a field line in the direction that retards its motion. (a) How far will the electron travel in the field before stopping momentarily, and (b) how much time will have elapsed? (c) If the region containing the electric field is 4.23 mm long (too short for the electron to stop within it), what fraction of the electron’s initial kinetic energy will be lost in that region?