Derivation of C = Q/V The circuit symbol for a?parallel plate?capacitor is two parallel lines Circuit symbol for a capacitor Capacitors can be combined in series and parallel circuits The combined?...
Defining Capacitance Capacitors are electrical devices used to store energy in electronic circuits, commonly for a backup release of energy if the power fails They can be in the form of: An isolate...
Electric Potential Energy of Two Point Charges The electric potential energy Ep at point in an electric field is defined as: The work done in bringing a charge from infinity to that point The elect...
Potential Gradient An electric field can be defined in terms of the variation of?electric potential?at different points in the field: The electric field at a particular point is equal to the negati...
Electric Potential In order to move a positive charge closer to another positive charge, work must be done to overcome the force of repulsion between them Energy is therefore transferred to the cha...
Coulomb's Law All charged particles produce an electric field around it This field exerts a force on any other charged particle within range The electrostatic force between two charges is defined b...
Motion of Charged Particles A charged particle in an electric field will experience a force on it that will cause it to move If a charged particle remains still in a uniform electric field, it will...
Electric Field Strength The electric field strength of a uniform field between two charged parallel plates is defined as: Where: E =?electric field strength?(V m-1) ΔV = potential difference betwee...
Representing Electric Fields The direction of electric fields is represented by electric field lines Electric field lines are directed from positive to negative Therefore, the field lines must be p...
Electric Field Definition An electric field is a region of space in which an electric charge “feels” a force Electric field strength?at a point is defined as: The electrostatic force per unit posit...
Resonance In order to sustain oscillations in a simple harmonic system, a periodic force must be applied to replace the energy lost in?damping This periodic force?does work?on the resistive force d...
Damping In practice, all oscillators eventually stop oscillating Their amplitudes decrease rapidly, or gradually This happens due to?resistive forces, such friction or air resistance, which act in ...
