The charge per unit length on a long, straight filament is −90.0μC/m. Find the electric field (a) 10.0cm,(b) 20.0cm, and (c) 100cm from the filament, where distances are measured perpendicular to the length of the filament.

An electron is moving horizontally at 3 x 10^6 m/s when it enters an electric field. If the electron deflects 0.9 cm downward in a distance of 2.5 cm determine the magnitude and direction of the electric field.

Inside a cathode ray tube, an electron is in the presence of a uniform electric field with a magnitude of 275 N/C. (a) What is the magnitude of the acceleration of the electron (in m/s2)?                            m/s2 (b) The electron is initially at rest. What is its speed (in m/s) after 1.20 ✕ 10−8 s?                            m/s

In the figure shown, q = 1.00 C. (a) What is the electric field's magnitude at x = 5.00 cm. (b) Find the location between the left side +q and the -2q charge where the field's magnitude is equivalent to that sourced individually by the -2g charge. (c) Does the electric field vanish at any position (other than negative infinity) left of the -2q charge? (d) The electric field vanishes for positions far to the left or right of the charges shown. Along which direction does the field's magnitude vanish more quickly? Elaborate. x (cm) -2q 10 +q +q

At some instant the velocity components of an electron moving between two charged parallel plates are vx=1.6×105 m/s and vy-3.4x10³ m/s. Suppose the electric field between the plates is uniform and given by E what are (a) the electron's acceleration in that field and (b) the electron's velocity when its x coordinate has changed by 2.1 cm? 120N/C). In unit-vector notation, (a)(i (b)(i ~)J. ✓ )it( i THIN OF

A proton is initially at rest. After some time, a uniform electric field is turned on and the proton accelerates. The magnitude of the electric field is 1.81  105 N/C. (a) What is the speed of the proton after it has traveled 7.00 cm? (b) What is the speed of the proton after it has traveled 70.0 cm?

Inside a vacuum tube, an electron is in the presence of a uniform electric field with a magnitude of 320 N/C. (a). What is the magnitude of the acceleration of the electron (in m/s2)?   m/s2     ?? (b). The electron is initially at rest. What is its speed (in m/s) after 1.15 ✕ 10−8 s? m/s ?