Problem

If the acceleration and velocity of a charged particle moving in a constant magnetic region is given by

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

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

. [

a_1

a_2

b_1

and

b_2

are constants], then choose the wrong statement. (a) Magnetic field may be along

y

-axis (b)

a_1 b_1 + a_2 b_2 = 0

x

-axis (d) Kinetic energy of particle is always constant