The switch is closed at $t=0$. What can you say about $I(t=0+)$? <img src="./images/RL_circuit.png" align="right" style="width: 400px";/> 1. Zero 2. $V_0/R$ 3. $V_0/L$ 4. Something else! 5. ??? Note: * Correct Answer: A

<img src="./images/RL_circuit.png" align="right" style="width: 300px";/> The switch is closed at $t=0$. Which graph best shows $I(t)$ through the resistor? E) None of these (they all have a serious error!) <img src="./images/RL_graphs.png" align="center" style="width: 600px";/> Note: * Correct Answer: B

<img src="./images/RL_circuit.png" align="right" style="width: 300px";/> The switch is closed at $t=0$. What can you say about the magnitude of $\Delta V$(across the inductor) at $(t=0+)$? 1. Zero 2. $V_0$ 3. $L$ 4. Something else! 5. ??? Note: * Correct Answer: B

The complex exponential: $e^{i\omega t}$ is useful in calculating properties of many time-dependent equations. According to Euler, we can also write this function as: 1. $\cos(i \omega t) + \sin (i \omega t)$ 2. $\sin (\omega t) + i \cos(\omega t)$ 3. $\cos(\omega t) + i \sin (\omega t)$ 4. MORE than one of these is correct 5. None of these is correct! Note: * Correct Answer: C