<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