The diagram shows a positive charge moving in a magnetic
field.
in which direction is the magnetic force acting on the
charge?

Moving charges

Explanation:

We can remember this diagram using the right-hand rule. If you point your pointer finger in the direction the positive charge is moving, and then your middle finger in the direction of the magnetic field, your thumb points in the direction of the magnetic force pushing on the moving charge.

massxgravity x heght=weightxheight= pe

4900=490xh

h=10

beta is electron from nucleus

something from nucleus has changed, but charge must be same for cons of charge