1. Peer Instruction Protocol
PhET Investigation/ AC & DC Circuits

2. 1
Suggest three plausible explanations for why the light bulb is off.

3. 2
Examine Models 2 and 3, then predict and explain the effect of closing the switch unit.

4. 3
Examine Models 2 and 3, then predict and explain the effect of closing the switch unit.

5. Compare Models 4 and 5 then explain the impact of adding an inductor to the circuit.

6. Imagine that only the 4 batteries were removed from the circuit
Imagine that only the 4 batteries were removed from the circuit. Predict whether the light bulb will illuminate. 5

7. Based on Model #6, what would the approximate voltage be with 6 batteries?
Explain your reasoning. 6

8. Examine Models 7 and 8, then explain why the placement of the multi- meter probes produces different voltage measurements. 7

9. 8
Examine Models 7 and 8, then explain why the placement of the multi- meter probes produces different voltage measurements.

10. 9
Examine Models 9 and 10.
Then, describe and explain any difference you observed.

11. Then, describe and explain any difference you observed.10
Examine Models 9 and 10.
Then, describe and explain any difference you observed.

12. 11
Describe at least three actions that could lead to a multi-meter reading of ~56V.