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PHY 102 Test Compilation PHY 102 21 Objective Question
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Question

Find the electric field at a point 0.2 m from a charge of 20 uC. What force will the field exert on a charge of 10 uC placed at that point?
Options
A 22.00 N
B 47.00 N
C 45.00 N
Correct Answer
D 55.0 N
Correct Answer

Option C is the correct answer.

Detailed Explanation

Step 1 - find E: E = kQ/r2 = (9x109)(20x10-6)/(0.2)2 = 180,000/0.04 = 4.5x106 N/C. Step 2 - find F on the second charge: F = qE = (10x10-6)(4.5x106) = 45.0 N.

Hint

Step 1 - find E: E = kQ/r2 = (9x109)(20x10-6)/(0.2)2 = 180,000/0.04 = 4.5x106 N/C.

Question Info

Course: PHY 102
Topic: Test Compilation PHY 102 21
Type: Objective
Difficulty: Not specified
Question 1310 of 1819
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