A Property of the Place

You'll learnwhat an electric field is, why it does not depend on the charge you probe it with, which way it pushes a negative charge, and how to add two fields.

Put a 1 nC test charge somewhere and it feels 2 µN. Swap it for a 2 nC charge and it feels 4 µN. The force doubled, and something underneath did not move at all. Eleven short steps; press Next for each one.

11 STEPS · 6 QUICK CHECKS · E = F/q · LINES ARE NOT PATHS · ARROWS BEFORE NUMBERS · v2

the field arrow is cyan, the force arrow is amber · they are different things

Before you start

What you're looking at

Charges on a line, with two kinds of arrow in two colours: cyan for the electric field at a point, amber for the force on a charge sitting there.

The question

If the field is measured with a test charge, what stops it depending on which test charge you used?

Step 1 / 11