Question # $9$

The voltage source V in the circuit shown in Fig. $9$ is set to $10$ V $.$ The current I is measured to be $10$ mA $.$ An ideal voltmeter is used to measure the voltage V $2$ in the circuit, and it reads $3\mathrm{.}9$ V $.$ What are the values of R$1$ and R$2$ in the circuit? Show work to gain full credits. $[$Circle the correct answer$]$

$[4$ Marks$]$

A$)R1=390$ and $R2=610$

B$)R1=610$ and $R2=390$

C$)R1=1830$ and $R2=1170$

D$)R1=1250$ and $R2=870$

E$)$ None of the above

Question #$10$

Resistors R$1)$ and R$2(20k+-2\%)$ are connected in parallel as shown in Fig. $10.$ It is intended to replace the set of these two resistors connected in parallel by a single ideal resistor of value $R_{eq}.$ Find the possible range of values $R_{eq}$ can take. Show work to gain full credits.

$[4$ Marks$]$

Fig. $10$