A wide region of space has curved magnetic field lines as shown in the figure. A proton enters into the region as shown. Draw the path of the proton.

Find the electric field in region II as shown in figure.

A particle enters the region of a uniform magnetic field as shown in figure. The path of the particle inside the field is shown by dark line. The particle is :

An alpha - particle and a proton moving with the same kinetic energy enter a region of uniform magnetic field at right angles to the field . The ratio of the radii of the paths of alpha - particle to that of the proton is

A positive charge enters in the region of transverse magnetic field as shown in figure. Velocity of charge is in such a way that charge passes through both inward and outward magnetic field regions, then possibly correct path of the charge is

A positive charge enters in the region of transverse magnetic field as shown in figure. Velocity of charge is in such a way that charge passes through both inward and outward magnetic field regions, then possibly correct path of the charge is

Two protons of equal kinetic energies enter a region of uniform magnetic field . The first proton enters normal to the field direction while the second enters at 30^(@) to the field direction . Name the trajectories followed by them.

Four particles enter a region of uniform magnetic field. Their trajectories are shown in figure. What are the signs of the charge of all four particles ?