$9$

exerted on this third charge$3$q $?$

The direction of the net electric force exerted

on this third charge$3$q points:

$($A$)$ upward

$($B$)$ downward

$($C$)$ to the right

$($D$)$ to the left

$($E$)$ to nowhere. There is no net force.

Problem $13$:

A circuit contains four resistors. Resistor$1$

R

has a resistance of $53\mathrm{.}0,$ resistor$2$R

has a resistance of $115,$ resistor$3$R

has a resistance of $81\mathrm{.}0,$ and

resistor$4$R has a resistance of $155.$

If the battery has a voltage ofV $=45\mathrm{.}0$

V$,$ how much electrical power is

dissipated in resistor$2$R $?$

$($A$)5\mathrm{.}72$ W

$($B$)8\mathrm{.}25$ W

$($C$)3\mathrm{.}62$ W

$($D$)4\mathrm{.}57$ W

$($E$)2\mathrm{.}75$ W

Problem $14$:

Two parallel metal plates$3$ m$103\mathrm{.}5$

$$ apart have a potential difference between them of $175$ V$.$

Suppose that the separation between these two plates is much smaller than the dimension of

each plate. $($In class, the instructor specified this condition asd A$.)$ The electric force

exerted on a positive charge of $6\mathrm{.}41019$ C at a point midway between these two plates is

approximately