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

Fluency Practice

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

A charge of $+3$ μC is fixed in space. No other charges are present. Does an electric field exist at a point 0.5 m away?

No — there is no second charge to exert force on, so there is no field.

Yes — the electric field exists in space due to the source charge, whether or not a test charge is present.

Yes — but only along the line connecting the charge to that point.

No — the electric field requires at least two charges.