Hello friends in this video we are going
to see two factors associated with AC
quantity and that is form factor and
peak factor we have seen that average
value RMS value maximum value of AC
quantity what if we can establish the
relationship between them so that is the
thing over here so the first factor is
form factor it is a ratio of RMS value
to the average value so form factor KF
is given as RMS voltage or RMS value of
AC quantity divided by average value if
I write I RMS divided by I average so
Kf can be seen is 0.707 
 IM we know I RMS is
0.707 IM  so instead of I
RMS I put 0.707 IM instead of I
average it is 0.637
IM IM  is a constant term which I can
cancel it out so it left Kf equal to
0.707 divided by
0.637  if we start
you will get a constant equal to 1.11
 so form factor for AC
sinusoidal quantity is 1.11
lets define another factor which is
peak factor or crest factor it is
nothing but the ratio of maximum value
to RMS value so KP is given as maximum
value divided by RMS value maximum value
is IM RMS I denoted as I RMS we know I
RMS is 0.707 IM IM I can cancel it
out so ultimately I will get KP as 1
upon 0.707 so if I solve it is actually
root 2 and root 2 is nothing but 1.414
so peak factor is 1.414
 sinusoidally
varying voltage or  sinusoidal varying
quantity so these are the two fixed
constant factors associated with AC
quantity thank you
