As Shown in the Figure, an Ac Source Whose Rms $80 \mathrm {~V}$

Multiple Choice

As shown in the figure, an ac source whose rms voltage is $80 \mathrm {~V}$ is in series with a $100 - \Omega$ resistor and a capacitor whose reactance is $200 \Omega$ at the frequency of the source. What is the rms voltage across the capacitor?

A) $74 \mathrm {~V}$
B) $72 \mathrm {~V}$
C) $66 \mathrm {~V}$
D) $68 \mathrm {~V}$
E) $70 \mathrm {~V}$