The Faraday's law of
induction states that the induced voltage is proportional to the rate
of change of the magnetic flux. In other words, since a frequency is
an inverse of time, when the frequency of the flux increases the
pick-up signal, which can equally be regarded as induced voltage
(V), also increases. For CRFP a probate solution for determining the
signal Voltage for CFRP is given in Ref