A Push That Needs Motion

You'll learnwhen a magnetic field pushes on a charge, and which way that push can point.

A charge sits in a strong magnetic field and feels nothing at all. Make it move, and a push appears: sideways, out of the screen. Twelve short steps; press Next for each one.

12 STEPS · 6 QUICK CHECKS · NO MOTION, NO PUSH · ACROSS, NOT ALONG · CLOSED LOOPS · v2

no motion, no push · across, never along · lines are closed loops

Before you start

What you're looking at

A magnetic field drawn as blue lines, with one charged particle. Amber is its motion; the pink circled dot is a push pointing out of the screen.

The question

When does the field push the charge, and which way?

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