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PHY 102 Test Compilation PHY 102 23 Objective Question
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Question

A 6.0x10-6 C charge is 4.0 m from a -3.0x10-6 C charge. What is the electric potential at P, halfway between the charges?
Options
A -2 x 10-4 V
B 6.8 x 103 V
C 1.4 x 104 V
Correct Answer
D 4.1 x 104 V
Correct Answer

Option C is the correct answer.

Detailed Explanation

P is halfway, so it is 2.0 m from EACH charge. Potential is a SCALAR - just add the values with their signs: V1 = kq1/r = (9x109)(6x10-6)/2 = +27,000 V. V2 = kq2/r = (9x109)(-3x10-6)/2 = -13,500 V. V_total = 27,000 - 13,500 = 13,500 V = 1.4x104 V.

Hint

P is halfway, so it is 2.0 m from EACH charge.

Question Info

Course: PHY 102
Topic: Test Compilation PHY 102 23
Type: Objective
Difficulty: Not specified
Question 1367 of 1819
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