Electric field strength, E, is defined as the force per unit positive charge.
E= F / Q E has units NC-1
The closer together the field lines, the stronger the field. Field lines point towards a negative charge.
Radial Field has a point charge:
Electric field strength, E=KQ / r²
Uniform Field can be produced by connecting two parallel plates to the opposite poles of a battery. The field strength is the same at all points within the field:
Electric field strength, E= V / d E has units Vm-1 ( V = potential difference)
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