Question Detail

PHY 102 Test Compilation PHY 102 7 Objective Question
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Question

Point charge -30 μC at origin. Electric field at point 50 cm along 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 = (9×10⁹ × 30×10⁻⁶)/(0.5)² = (270000)/0.25 = 1.08×10⁶ N/C = 1080 kN/C = 1.08 MN/C. Negative charge → field toward origin → negative sign. Option C (-1.08 MN/C).

Hint

E = kq/r², direction toward negative charge.

Question Info

Course: PHY 102
Topic: Test Compilation PHY 102 7
Type: Objective
Difficulty: Not specified
Question 485 of 1819
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