The circuit in Eigure P4.56 is used as a variable delay in a burglar alarm. The alarm is a siren with an internal resistance of $1 \mathrm{k} \Omega$. The alarm will not sound until the current $i_0$ exceeds $100 \mu \mathrm{~A}$. Use a graphical solution or a computer simulation to find the range of the variable resistor $R$ for which the delay is between 1 and 2 s . Assume the capacitor is initially uncharged.
(FIGURE CAN'T COPY)
Figure P4.56