The output of a power supply is represented by:
where 
is the potential difference in volts and 
is the time in seconds. Determine, for the output of the supply:
the root-mean-square (r.m.s.) voltage, 
the period 
.
The variations with time of the output potential difference from two different power supplies are shown in graph I and graph II below.
The graphs are drawn to the same scale. State and explain whether the same power would be dissipated in a 
resistor connected to each power supply.
.
.
