| Column I | Column II | Column III | |---|---|---| |

PHYSICS · Single correct · AP · Physics 2: Algebra-based · Magnetism and Electromagnetism · Magnetism and Electromagnetism

Problem

Column I	Column II	Column III
(i) Electron with $\vec{v}=2\frac{E_0}{B_0}\hat{x}$	(i) $\vec{E}=E_0\hat{z}$	(p) $\vec{B}=-B_0\hat{x}$
(ii) Electron with $\vec{v}=\frac{E_0}{B_0}\hat{y}$	(ii) $\vec{E}=-E_0\hat{y}$	(q) $\vec{B}=B_0\hat{x}$
(iii) Proton with $\vec{v}=0$	(iii) $\vec{E}=-E_0\hat{x}$	(r) $\vec{B}=B_0\hat{y}$
(iv) Proton with $\vec{v}=2\frac{E_0}{B_0}\hat{x}$	(iv) $\vec{E}=E_0\hat{x}$	(s) $\vec{B}=B_0\hat{z}$

In which case would the particle move in a straight line along the negative

y

-axis, that is, along

-\hat{y}

? (1) (II), (iii), (q) (2) (III), (ii), (r) (3) (IV), (ii), (s) (4) (III), (ii), (p)