Edexcel ·Physics·Cambridge AS & A Level Physics

Electric Fields & Capacitance

15 min read

Electric field strength and Coulomb's law, electric potential, uniform fields, capacitance and energy stored, and capacitors in series and parallel.

Electric field strength

The electric field strength is the force per unit positive charge:

$E = \dfrac{F}{Q} \quad (\text{N C}^{-1}\ \text{or V m}^{-1})$

It is a vector pointing in the direction of the force on a positive charge.

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Edexcel ·Physics·Cambridge AS & A Level Physics

15 min read

Electric field strength and Coulomb's law, electric potential, uniform fields, capacitance and energy stored, and capacitors in series and parallel.

The electric field strength is the force per unit positive charge:

$E = \dfrac{F}{Q} \quad (\text{N C}^{-1}\ \text{or V m}^{-1})$

It is a vector pointing in the direction of the force on a positive charge.

Create a free account to read this note in full. Every free account gets 2 complete revision notes — no card needed.