Question Detail

PHY 102 Last Minute Prep Objective Question

The electric field 2.0m from a point charge has a magnitude of 8.0×10^4 N/C. What is the magnitude of the electric field at a distance of 4.0m?

A 2.0×10^4 N/C

Correct Answer

B 4.0×10^4 N/C

C 1.6×10^5 N/C

D 3.2×10^5 N/C

Option A is the correct answer.

Electric field follows inverse square law: E ∝ 1/r². E2 = E1(r1/r2)² = 8.0×10^4 × (2/4)² = 2.0×10^4 N/C.

Electric field strength is inversely proportional to the square of the distance from a point charge.

Course: PHY 102

Topic: Last Minute Prep

Type: Objective

Difficulty: Not specified

Question 1690 of 1819

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