Phy102&08-I-ms1

Phy102&08-I-ms1 - Part I: Problems Show units. 1....

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Unformatted text preview: Part I: Problems Show units. 1. Below, q 1 (= 2 . C) and q 2 (= 3 . C) are point charges; a = 2 . 0 mm. Find the y component (in N) of the net electric force on a point charge q (=- 4 . 0 nC) at point P . (3 points) x y q 1 q 2 P vector F 1 vector F 2 a a F y = + F 1 = k | q | q 1 a 2 = +18 N 2. The path of a point particle (mass m = 2 . 5 10- 12 kg) through the uniform electric field vector E = (350 N/C) hatwide is shown below; D = 0 . 40 m and d = 14 cm. Find the charge q (in C) of the particle if the velocity vectorv = (2 . 0 km/s) hatwide . (Give a reason for your choice of sign of q .) (5 points) vector E vectorv D d x = v t y = 1 2 a y t 2 x =+ D, y =- d = a y =- 2 d t 2 =- 2 d parenleftbigg v D parenrightbigg 2 =- 7 . 10 +6 m/s 2 a y = q m E y = q = m a y E y =- 5 . 10- 8 C ( vectora opposite to vector E = q < 0) 3. An infinite line of charge (of constant linear charge density =- . 25 nC/m) lies on the z-axis below. Find the x component E x (in N/C) of the electric field at the point P with coordinates x =- 2 m, y = +3 m and z = 0 m. ( Define any angles you use in a diagram. ) (4 points) x y z P- 2 m +3 m vector E E x = + | vector E | cos = 2 k | | r cos = 2 k | | 13 2 13 = 0 . 69 N/C 4. The spherical shell of charge shown in cross-section below (of uniform volume density...
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Phy102&08-I-ms1 - Part I: Problems Show units. 1....

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