Question Detail

PHY 102 Test Compilation PHY 102 21 Objective Question

The electric field 2.0 m from a point charge has a magnitude of 8.0x104 N/C. What is the strength of the electric field at a distance of 4.0 m?

A 2.0 x 104 N/C

Correct Answer

B 4.0 x 104 N/C

C 1.6 x 105 N/C

D 3.2 x 105 N/C

Option A is the correct answer.

E is proportional to 1/r2. Doubling the distance (2m -> 4m) reduces E by a factor of 22 = 4. New E = (8.0x104)/4 = 2.0x104 N/C.

E is proportional to 1/r2.

Course: PHY 102

Topic: Test Compilation PHY 102 21

Type: Objective

Difficulty: Not specified

Question 1282 of 1819

Previous Course Details Next