Problem:
The circuit below initially is just a single series loop. The problem asks what happens when the second loop is incorporated by flipping the switch. Specifically, what will happen to the to each bulb after the switch is closed.
As a group, the consensus was that the top bulb would become brighter while the lower bulb would remain the same. The logic behind it was the assumption that there would be a greater current across the top bulb, resulting in a brighter bulb, and then return to its original, resulting in the lower bulb staying the same.
Unfortunately, our hypothesis was wrong. It turned out that both bulbs stay the same because there is no voltage drop across either bulb.
In reality, the only thing that the added loop would do for the system as a whole is that it would remain turned on for longer.
Exercise 2:
Problem:
"Given an incandescent light bulb rated at 75 watts and 120 volts, find the “hot” resistance and “cold” resistance of the light bulb. The filament is made of tungsten (52 × 10-8 Ωm)."
Typically as temperature increases, resistance increases, giving us the equations below where Rc is the cold resistance, and Rh is the hot resistance.
Exercise 3:
Lab:
"Dependent Sources and MOSFETs"
The following circuit was created using a breadboard, MOSFET, resistor, DMM, and power source, the analog discovery.
Testing the analog discovery to make sure it is being properly used.
The voltage was set to 2 Volts and then measured... obviously backwards
MOSFETs have a threshold voltage, below which little to no current passes through it. So beginning with zero voltage. At about 0.2 Volts a measurable change occurred.
Data was recorded and a graph of current vs voltage was generated.
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