Cracking the SAT Physics Subject Test

(Marvins-Underground-K-12) #1
(A) To the left, in the plane of the page
(B) Upward, in the plane of the page
(C) Downward, in the plane of the page
(D) Out of the plane of the page
(E) Into the plane of the page


  1. A particle of charge −0.04 C is projected with speed 2 × 10^4 m/s into a
    uniform magnetic field, B, of strength 0.5 T. If the particle’s velocity as it
    enters the field is perpendicular to B, what is the magnitude of the magnetic
    force on this particle?


(A) 4 N
(B) 8 N
(C) 40 N
(D) 80 N
(E) 400 N
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