The acceleration of an electron at a certain moment in a magnetic field is

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

Problem

The acceleration of an electron at a certain moment in a magnetic field

\mathbf{B}=2\hat{\mathbf{i}}+3\hat{\mathbf{j}}+4\hat{\mathbf{k}}

\mathbf{a}=x\hat{\mathbf{i}}+\hat{\mathbf{j}}-\hat{\mathbf{k}}

. The value of

x

is (a)

0.5

(b)

1

(c)

2.5

(d)

1.5