Question $2-$ An AC electrical generator can be modelled as a sinusoidal AC voltage source with an RMS output voltage

of $14$ V$,$ a frequency of $400$ Hz$,$ and a series resistance of $10$ Ohms.

$($a$)$ Express the open circuit voltage of the generator as a function of time.

$($b$)$ Express the open circuit voltage of the generator as a phasor.