An experimental set-up for electrostatic measurement of ##IMG##
[http://ej.iop.org/images/0143-0807/38/2/025203/ejpaa50c7ieqn1.gif] {${\varepsilon }_{0}$} ,
separate magnetostatic measurement of ##IMG##
[http://ej.iop.org/images/0143-0807/38/2/025203/ejpaa50c7ieqn2.gif] {${\mu }_{0}$} and determination
of the speed of light ##IMG## [http://ej.iop.org/images/0143-0807/38/2/025203/ejpaa50c7ieqn3.gif]
{$c=1/\sqrt{{\varepsilon }_{0}{\mu }_{0}}$} according to Maxwell’s theory with percent accuracy is
described. No forces are measured with the experimental set-up, therefore there is no need for a
scale, and the experiment cost of less than £20 is mainly due to the batteries used. Multiplied
137 times, this experimental set-up was given at the Fourth Open International Experimental Physics
Olympiad (EPO4) and a dozen high school students performed successful experiments. The experimental
set-up actually contains two diffe…