006 (part 1 of 2) 10.0 points A 1.2 C point charge is on the z-axis at 2.9 m, an

Question

006 (part 1 of 2) 10.0 points A 1.2 C point charge is on the z-axis at 2.9 m, and a 4.3 C point charge is on the r-axis at 4.5 m Find the magnitude of the net electric field at the point on the y-axis where y = 1.3 m. The value of the Coulomb constant is 8.98755 × 109 N·m"/C2 Answer in units of N/C 007 (part 2 of 2) 10.0 points Determine the direction of this electric field (as an angle between -180° and 180° ma sured from the positive r-axis, with counter- clockwise positive.) Answer in units of 008 10.0 points The electron gun in a television tube is used to accelerate electrons with mass 9.109 × 10-31 kg fromi rest to 2x107 m/s within a distance of 2.8 cm. What electric field is required? The funda- mental charge is 1.602 × 10-19 C Answer in units of N/C 009 (part 1 of3) 10.0 points An electron traveling at 5 × 100 m/s enters a 0.09 m region with a uniform electrie field of 255 N/C, as in the figure

Explanation / Answer

008 )

q = magnitude of charge on electron = 1.6 x 10-19 C

m = mass of electron = 9.1 x 10-31 C

Vi = initial velocity = 0

Vf = final velocity = 2 x 107 m/s

d = distance travelled = 2.8 cm = 0.028 m

a = acceleration

using the equation

Vf2 = Vi2 + 2 a d

(2 x 107)2 = (0)2 + 2 a (0.028)

a = 7.14 x 1015 m/s2

force is given as

F = ma

also force is due to electric field hence

qE = ma

(1.6 x 10-19) E = (9.1 x 10-31) (7.14 x 1015)

E = 4.1 x 104 N/C

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