A point charge is positioned in the center of a hollow metallic shell of radius R. During four experiments the value of point charge and charge of...

Rank the results of experiments according to the charge on the inner surface of the shell, most positive first:

1, 2, 3, 4

2, 4, 3, 1

2, 3, 1, 4

1, 3, 4, 2

When electron moves in the direction which is against direction of electric field lines we can conclude that:

e.