1. Bell Work: Electric Fields
Electric field lines point towards ( negative / positive ) charges.
There are fewer lines when a field is ( strong / weak ).
Field lines are ( straight / curved ) when charges interact.
Attraction is shown when field lines curve ( towards / away from ) each other.
A ( positive / negative ) test charge will move in the direction of the arrows.

2. Electric Field Calculations

3. Magnitude (strength) of the electric field (E) can be calculated using
E = magnitude of electric field – unit is Newtons per Coulomb (N/C)
F = electric force – unit N
q = charge of body – unit is C

4. It takes work to move a charge against an electric field.
This work done per unit of charge is called potential difference.
Unit for potential difference is the volt (V).

6. W = Work (or potential energy) (J) Q = charge (C)
The equation for calculating voltage is:
symbols units
V = voltage (V)
W = Work (or potential energy) (J)
Q = charge (C)