(3%) Problem 14: An electron (rn = 9.109 × 10-31 kg) is in the presence of a con

Question

(3%) Problem 14: An electron (rn = 9.109 × 10-31 kg) is in the presence of a constant electric field E. The electron has a charge of e = 1.602 × 10-19 C and it accelerates at a rate of a = 4900 m/s2 33% Part (a) write an expression for the magnitude of the electric field Grade Summary Deductions Potential 0% 100% Submissions Attempts remaining: Z % per attempt) detailed view 0 Submit Hint I give up! Hints: 0% deduction per hint. Hints remaining: 2 Feedback: 0% deduction per feedback 33% Part (b) What is the field, in units of N/C? D 33% Part (c) Assuming the electron begins at rest, what is its velocity after 4.5 s? Give your answer in meters per second

Explanation / Answer

a) force on electron, F= eE,

Acceleration of electron, a= F/m = eE/m

E= ma/e

b) E=2.786*10-8 N/C

c) using,

v=u+at

v= 0+ 4900*4.5

v =22050

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