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PHY 102 Test Compilation PHY 102 21 Objective Question
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Question

A point charge, -30 uC, is placed at the origin of the coordinates. Find the electric field at a point 50cm along the x-direction.
Options
A -10.8 kN/C
B -1.08 kN/C
C -1.08 MN/C
Correct Answer
D -10.8 MN/C
Correct Answer

Option C is the correct answer.

Detailed Explanation

E = kQ/r2 = (9x109)(30x10-6)/(0.5)2 = 270000/0.25 = 1.08x106 N/C = 1.08 MN/C. Since the charge is negative, the field points TOWARD the origin (i.e. in the -x direction at this point), giving E = -1.08 MN/C.

Hint

E = kQ/r2 = (9x109)(30x10-6)/(0.5)2 = 270000/0.25 = 1.08x106 N/C = 1.08 MN/C.

Question Info

Course: PHY 102
Topic: Test Compilation PHY 102 21
Type: Objective
Difficulty: Not specified
Question 1291 of 1819
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