Two magnetic dipoles are lying as shown in figure. The separation `'d'` between them is very large. A point charge `Q` is projected with some speed `v` as shown. The force experienced by the charged particle is :

For a charged parallel plate capacitor shown in the figure, the force experienced by an alpha particle will be :

For a charged parallel plate capacitor shown in the figure, the force experienced by an alpha particle will be :

Two point charges Q and - Q //4 are separated by a distance X . Then . force between this two charge

A charged particle moves with velocity v in a uniform magnetic field vecB . The magnetic force experienced by the particle is

There exist uniform magnetic field vec(B)=-B_(0)hatk in region of space with 0ltxltd and 2dltxlt3d as shown in the figure. A positive charged particle of mass m and charge q is projected with velocity vec(v)=vhat(i) as shown in the figure. If radius of curvature of path of the charged particle in magnetic field is R(2dltRlt3d) then time elapse by charged particle in magnetic field regions is

There exist uniform magnetic field vec(B)=-B_(0)hatk in region of space with 0ltxltd and 2dltxlt3d as shown in the figure. A positive charged particle of mass m and charge q is projected with velocity vec(v)=vhat(i) as shown in the figure. If radius of curvature of path of the charged particle in magnetic field is R(2dltRlt3d) then time elapse by charged particle in magnetic field regions is

There exist uniform magnetic field vec(B)=-B_(0)hatk in region of space with 0ltxltd and 2dltxlt3d as shown in the figure. A positive charged particle of mass m and charge q is projected with velocity vec(v)=vhat(i) as shown in the figure. If radius of curvature of path of the charged particle in magnetic field is R(2dltRlt3d) then time elapse by charged particle in magnetic field regions is