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CHECK YOURSELF ANSWERS
1The student is wrong. Positive charges are fixed and cannot move.
2Since Eâ1r2 and r is doubled E will decrease by a factor of 4.
3
4Field lines cannot cross since at the crossing point the direction of the field would not be defined.
5It is the same everywhere because the electric field is uniform.
6
7
8aRepulsion;
battraction.

9Out of the page
103.0 Ã 108 m sâ1, the speed of light in a vacuum. This is worth looking into!
