What is the potential difference $V_B-V_A$ when $I=0\mathrm{.}50$A the circuit segment shown below?

a$.+28$ V

b$.+2\mathrm{.}0$ V

c$.-28$ V

d$.-2\mathrm{.}0V$

c$.+18$ V

ANS: A PTS: $2$ DIF: Average

$6.$ If $R=2\mathrm{.}0k,C=4\mathrm{.}0mF,=8\mathrm{.}0V,Q=20mC,$ and $I=3\mathrm{.}0$ mA $,$ what is the potential difference $V_b-V_a?$

a$.+7\mathrm{.}0$ V

b$.+19$ V

c$.+9\mathrm{.}0$ V

d$.-3\mathrm{.}0V$

e$.-14$ V