A student is using a power supply that produces a sinusoidal output. The meters on the supply show that the output voltage 
has a root-mean-square (r.m.s.) value of 
with a frequency of 
. The variation with time 
of the output voltage may be represented by the expression
Determine the value of
A capacitor with a large capacitance is connected across the terminals of the supply. Suggest and explain why this may lead to a large current from the supply.
.
.
is required to charge the capacitor. Thus, the capacitor would charge and discharge in a short time 
is given as the charge 
