Question Detail

PHY 102 Test Compilation PHY 102 8 Objective Question

Question

How far apart are two charges 3 C and 5 C if force is 20 N?

Options
A 82,000 m
Correct Answer
B 82 m
C 0.82 m
D 8.2 m
Correct Answer

Option A is the correct answer.

Detailed Explanation

r = √(kq₁q₂/F) = √(9×10⁹ × 3 × 5 / 20) = √(1.35×10¹¹/20) = √(6.75×10⁹) = 8.22×10⁴ m? That gives 82,000 m.  A.

Hint

Assume charges in μC for 0.082 m.

Question Info