FIGURE $11-47$

$23.$ What is the voltage across the inductor in Figure $11-45$ at each of the following times?

$($a$)60s$

$($b$)70s$

$($c$)80s$

$24.$ What is the voltage across the resistor in Figure $11-45$ at a time of $60$ s$?$

$25.($a$)$ What is the current in the inductor $1\mathrm{.}0s$ after the switch closes in Figure $11-47.$

$($b$)$ What is the current after $5$ have elapsed?

$26.$ For the circuit in Figure $11-47,$ assume the switch has been closed for more than $5$ and is opened. What is the current in the inductor $1\mathrm{.}0s$ after the switch is opened?

$27.$ Determine the value of $I_{L2}$ in Figure $11-48.$