<img src="./images/2_loops_in_B.png" align="right" style="width: 400px";/> Loop 1 sits in a uniform field B which is increasing in magnitude. Loop 2 has the SAME LENGTH OF WIRE looped (coiled) to make two (smaller) loops. How do the induced EMFs compare? 1. EMF(1)=4 EMF(2) 2. EMF(1) = 2 EMF(2) 3. They are both the same. 4. EMF(2)= 4 EMF(1) 5. EMF(2) = 2 EMF(1) Note: * Correct Answer: B * Reduce A by 4, Loops up by 2

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: B

<img src="./images/RL_circuit.png" align="right" style="width: 300px";/> The switch is closed at $t=0$. Which graph best shows $I(t)$? 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

What is $\vert 2+i \vert$? 1. $1$ 2. $\sqrt{3}$ 3. $5$ 4. $\sqrt{5}$ 5. Something else! Note: * Correct Answer: D