nouveau_riche

but the definition given for energy is "capability of doing work"

well to begin with the fundamental definition of work and energy,i found a flaws in one energy is capacity of doing work work is the transfer of energy that takes place under the effect of force,in the direction of displacement vector potential is the ability of doing work but the working element may not be at action at present firstly how is energy different from potential? secondly work done by magnetic forces is zero but there is energy involved which counters the above definition?