nothing but, if you're talking about a closed and open circuit, a closed circuit has all the wires touching while an open circuit has a break in the circut closed can allow electrical currents to
follow the escaping civilians as they flee, get in your personal elevator and head on up. the power cuts out just before you reach the top floor, so open the emergency hatch and climb out the top. perform a strength tap, force the doors open and walk up the stairs to find some wannabe on your throne.
after the class has acted out an electrical circuit being open and closed, the students will return to their desks and have 3-5 minutes of individual journal time. they will write everything they did, what they learned, and describe what they know about an electrical circuit. as a class, students will share what they know about circuits.
for circuit analysis, it can be helpful to use a zero-ampere current source to represent an open circuit and a zero-volt voltage source to replace a short circuit. the reason that ohm's law doesn't apply here is that the closed circuit is created using an ideal wire, and ohm's law only applies to resistors.
an entrance to a blue-tinted room lies nearby, but ignore it and kill the liquidator rig. the blue room is crawling with baddies, and going in guns blazing is a tough hill to climb. instead, interact with the level 20 power circuit to open the back door, allowing you to isolate enemies and eliminate them, one at a time.