K12worX
Back to Electric Field — Problem 2 · Task Set 5

Exercises: Electric Field

Work through each section in order. Use $k = 9 \times 10^9$ N·m²/C² throughout. Show your work on calculation problems.

Grade 11·22 problems·~35 min·OpenStax Physics (High School)·section·sec-18-3
Work through problems with immediate feedback
A

Fluency Practice

Use k=9×109k = 9 \times 10^9 N·m²/C². Show your work on calculation problems.

1.

A point charge of q=−8.0×10−9q = -8.0 \times 10^{-9} C is at the origin. What is the magnitude of the electric field at a point 0.40 m away? Express your answer in N/C to two significant figures.