Question Detail

PHY 102 PHY 102 Past Questions Objective Question
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Question

What is the magnitude of an electric field in which the force on an electron equals the weight of the electron? (m = 9.11x10-31 kg, e = 1.6x10-19 C)
Options
A 2.00 x 10-11 N/C
B 4.65 x 10-11 N/C
C 5.00 x 10-11 N/C
D 5.58 x 10-11 N/C
Correct Answer
Correct Answer

Option D is the correct answer.

Detailed Explanation

Set electric force = weight: qE = mg E = mg/q = (9.11x10-31)(9.8)/(1.6x10-19) = (8.93x10-30)/(1.6x10-19) = 5.58x10-11 N/C.

Hint

Set electric force = weight: qE = mg E = mg/q = (9.11x10-31)(9.8)/(1.6x10-19) = (8.93x10-30)/(1.6x10-19) = 5.58x10-11 N/C.

Question Info

Course: PHY 102
Topic: PHY 102 Past Questions
Type: Objective
Difficulty: Not specified
Question 1312 of 1820
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