Capacitance

Capacitance is the ability to store charge. It is measured in farads (F) where one farad is equal to one coulomb per volt of potential difference. Q = CV Q is charge (coulombs)C is capacitance (farads)V is potential difference (V) The symbol for a capacitor is shown...

Electric Fields

Electric field strength is the force per unit charge Units NC⁻¹ or Vm⁻¹ It is a vector quantity  The direction of the field is the direction a positive charge would move in Density of field lines indicates field strength (closer together = stronger field) The diagram...

Gravitational Fields

A gravitational force of attraction exists between all objects with mass The magnitude of this force decreases with increased separation The force of gravity you experience due to the Earth (W=mg) is proportional to your mass Consider the forces acting on a mass...