If the acceleration and velocity of a charged particle moving in a constant magnetic…

PHYSICS · Single correct · CBSE · Physics · Moving Charges and Magnetism · Moving Charges and Magnetism

Problem

If the acceleration and velocity of a charged particle moving in a constant magnetic field are

\mathbf{a}=a_1\hat{i}+a_2\hat{k}

and

\mathbf{v}=b_1\hat{i}+b_2\hat{k}

, where

a_1

a_2

b_1

, and

b_2

are constants, choose the wrong statement. (a) The magnetic field may be along the

y

-axis. (b)

a_1b_1+a_2b_2=0

. (c) The magnetic field is along the

x

-axis. (d) The kinetic energy of the particle is always constant.