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PHY 102 Test Compilation PHY 102 22 Objective Question
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Question

An electron is situated in a uniform electric field of intensity 1.2x105 N/C. Calculate the time it takes to travel 20 mm from rest. (e = 1.6x10-19 C, m = 9.1x10-31 kg)
Options
A = sqrt[2(0.02)/(2.11x1016)] = 1.38x10-9 s.
B 2.31 x 10-6 s
C 1.38 x 10-5 s
D 1.38 x 10-8 s
Correct Answer
Correct Answer

Option D is the correct answer.

Detailed Explanation

a = eE/m = (1.6x10-19)(1.2x105)/(9.1x10-31) = 2.11x1016 m/s2. t = sqrt(2s/a) = sqrt[2(0.02)/(2.11x1016)] = 1.38x10-9 s.

Hint

a = eE/m = (1.6x10-19)(1.2x105)/(9.1x10-31) = 2.11x1016 m/s2.

Question Info

Course: PHY 102
Topic: Test Compilation PHY 102 22
Type: Objective
Difficulty: Not specified
Question 1355 of 1819
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