A negatively charged particle projected towards east is deflected towards north by a magnetic field. The field may be

A particle of charge $q$ and velocity $v$ passes undeflected through a space with non-zero electric field $E$ and magnetic field $B$. The undeflecting conditions will hold if.

An electron having charge $1.6 \times {10^{ – 19}}\,C$ and mass $9 \times {10^{ – 31}}\,kg$ is moving with $4 \times {10^6}\,m{s^{ – 1}}$ speed in a magnetic field $2 \times {10^{ – 1}}\,tesla$ in a circular orbit. The force acting on electron and the radius of the circular orbit will be

A particle of mass $m = 1.67 \times 10^{-27}\, kg$ and charge $q = 1.6 \times 10^{-19} \, C$ enters a region of uniform magnetic field of strength $1$ $tesla$ along the direction shown in the figure. the particle leaves the magnetic field at point $D,$ then the distance $CD$ is :-

If a proton is projected in a direction perpendicular to a uniform magnetic field with velocity $v$ and an electron is projected along the lines of force, what will happen to proton and electron