a. 2.3 × 103 N/C b. 9.0 N/C c. 2.3 N/C d, 0.75 × 10-6 N/C 16. If an electron is

Question

a. 2.3 × 103 N/C b. 9.0 N/C c. 2.3 N/C d, 0.75 × 10-6 N/C 16. If an electron is accelerated from rest through a potential difference of 1 200 V, find its approximate velocity at the end of this process. (e 1.6 x 101 c me a. 1.0 x 10' m/s b. 1.4 × 107 m/s c. 2.1 x 10' m/s d. 2.5 × 107 m/s 17. Four point charges are on the rim of a circle of radius 10 cm. The charges are (in JiC) +0.50, +1.5,-1.0,-0.50. If the electrical potential at the circle's center due to the +0.5 charge alone is 4.5 × 104 V, what is the total potential at the center due to the four charges combined? a, 18 x 104 V b. 4.5 × 104 V c. zero d.-4.5 × 104 V 18. A point charge of +3.0 AC is located at the origin of a coordinate system and a second point charge of -6.0 C is at x 1.00 m. What is the electric potential at the x = 0.50 m point? (k,-8.99 x 109 Nm'/c) 2myn a. 16x 104V b, 11 × 104 V c. -11 x 10 v d.-5.4 × 104 V

Explanation / Answer

16)

KE = change in energy

(1/2)mv^2 = eV

(1/2) x (9.11 x 10^-31) x v^2 = (1.60 x 10^-19 x 1200)

v = 2.053 x 10^7 m/s

v = 2.1 x 10^7 m/s

Ans (c)

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