A particle of mass and charge has an initial velocity

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

Problem

A particle of mass

m

and charge

q

has an initial velocity

\vec{v} = v_0 \hat{j}

. If an electric field

\vec{E} = E_0 \hat{i}

and magnetic field

\vec{B} = B_0 \hat{i}

act on the particle, its speed will double after a time: (1)

\frac{2mv_0}{qE_0}

(2)

\frac{3mv_0}{qE_0}

(3)

\frac{\sqrt{3}mv_0}{qE_0}

(4)

\frac{\sqrt{2}mv_0}{qE_0}