15 A charged particle (m=2.0 g, q=-50 μC) moves in a region of uniform field along a helical path (radius=4.0 cm, pitch=8.0 cm). as shown. What is the angle between the velocity of the particle and the
magnetic field?

(A)27°
(B)72°
(C)63°
(D)18°
(E)58°

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