Q15 · EM Fields

Problem

Positive charge in uniform E = E₀ ĵ and B = B₀ ĵ. Initial velocity in xy-plane at angle θ to x-axis.

Options

Option	Value
(A)	θ=0°: circular path in xz
(B)	θ=0°: helical constant pitch
(C)	θ=10°: helical increasing pitch
(D)	θ=90°: linear accelerated along y

Solution steps coming soon.

Hints

• E accelerates along y; B causes circular motion when v has x-component.

Answer

(C), (D)