Problem I

$(2$ points$)$

$($a$)0\frac{N}{C}.$

$($b$)-1\mathrm{.}6{10}^4\frac{N}{C}.$

$($c$)1\mathrm{.}6{10}^4\frac{N}{C}.$

$($d$)-9\mathrm{.}0{10}^3\frac{N}{C}.$

$($e$)9\mathrm{.}0{10}^3\frac{N}{C}.$

$($f$)-5\mathrm{.}0{10}^3\frac{N}{C}.$

$($g$)5\mathrm{.}0{10}^3\frac{N}{C}.$

$($h$)-4\mathrm{.}0{10}^3\frac{N}{C}.$

$($i$)4\mathrm{.}0{10}^3\frac{N}{C}.$

$($j$)$ none of the above.

$3.$ Find the net potential at the origin.

$(2$ point$)$

$($a$)0$ V $.$

$($b$)-5\mathrm{.}4{10}^{4}V.$

$($c$)5\mathrm{.}4{10}^{4}V.$

$($d$)-3\mathrm{.}6{10}^{4}V.$

$($e$)3\mathrm{.}6{10}^{4}V$

$($f$)-3\mathrm{.}0{10}^{4}V.$

$($g$)3\mathrm{.}0{10}^{4}V.$

$($h$)-2\mathrm{.}4{10}^{4}V.$

$($i$)2\mathrm{.}4{10}^{4}V.$

$($i$)$ none of the above.

$($e$)9\mathrm{.}0{10}^3\frac{N}{C}.$

$($f$)-5\mathrm{.}0{10}^3\frac{N}{C}.$

$($g$)5\mathrm{.}0{10}^3\frac{N}{C}.$

$($h$)-4\mathrm{.}0{10}^3\frac{N}{C}.$

$($i$)4\mathrm{.}0{10}^3\frac{N}{C}.$

$($j$)$ none of the above.

Find the $y$ component of the net electric

field at the onigin.