Useful constants: 
Binomial theorem: 
Gauss's law:Note that this is a surface integral!

Definition of electric potentialNote that this is a line integral!

Electric field for a point charge:

Electric potential for a point charge:

Ohm's law

Definition of capacitance:

Resistance of a cylinder:

Parallelplate capacitance:

Power delivered by battery


Electrical energy density

Energy stored by capacitor

Resistors in series

Capacitors in series

Resistors in parallel

Capacitors in parallel

Capacitor charging by emf through resistor:

Capacitor discharging through resistor:
