A particle of mass m and charge q has an initial velocity v = v₀ j. If an electric field E = E₀ i and magnetic field B = B₀ i act on the particle, its speed will double after a time:

Magnetic Effects of Current and Magnetism: JEE Main 2020 Physics question

JEE Main 2020 · 7 Jan, Evening shift · Q7753

JEE Main 20207 Jan, Evening shiftPhysicsMediumMagnetic Effects of Current and Magnetism165× since 2002

A particle of mass m and charge q has an initial velocity

\overrightarrow v = {v_0}\widehat j

. If an electric field

\overrightarrow E = {E_0}\widehat i

and magnetic field

\overrightarrow B = {B_0}\widehat i

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