A pair of parallel plates are charged with uniform charge densities of -30pC/m2

Question

A pair of parallel plates are charged with uniform charge densities of -30pC/m2 and +30pC/m2 . The distance between the plates is 2. 5mm. If a free electron is released at rest from the negative plate, find its speed when it reaches the positive plate. Express your answer to two significant figures and include the appropriate units. v = My Answers Find the time it takes the electron to travel across the 2. 5mm gap. Express your answer to two significant figures and include the appropriate units. t = My Answers

Explanation / Answer

E=/0=3.39N/C

V=E.s=8.47*10-3

a)0.5mv2=8.47*10-3eV

Solving for v,

v=55000m/s

b)a=qE/m

t=v/a=vm/qE=9.2*10-8s=92ns

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