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SAT® Subject Test in Physics

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Difficult

Negative Circles

SATPHY-YVQYA9

Each of the diagrams for A-E shows a negatively charged particle moving in a circular path, at a constant speed, in the plane of the page (or screen), in the direction indicated by the black arrows, because of the force exerted on the partcle by a uniform magnetic field.

Magnetic field directions are shown by blue arrows or by X's (into the page) or dots (out of the page).

Which diagram shows the situation most likely to occur?

A
B
C
D
E