Nt1310 Unit 5 Activity 2

In Unit 5 Activity 2 we were asked to predict and then find the brightness and flow rate of a closed circuit with a three cell battery pack, a long bulb, a capacitor parallel to the long bulb, and a round bulb. I originally predicted that the round bulb would be brighter when the circuit was first closed and when the circuit reached a steady state, and that the wire between the round bulb and the negative side of the battery would have a higher flow rate than the other wires. However, in the steady state the long bulb was actually brighter, and all the wires had the same flow rate. The new data allowed me to understand how different resistances in bulbs affects the brightness of bulbs in the circuit.

Before this activity I knew that round
The concepts behind the direct relationship of battery cells and compass deflection are the same concepts that support the direct relationship of voltage difference and current included in Ohm’s Law. When we began gather data using Ohm’s Laws, the trend of current increasing as voltage increases made sense because Unit 2 Activity 3 taught me that flow rate increases when the number of battery cells increases. The Unit 2 Activity 2 CER discussed the origin of mobile charge in charging and discharging circuits, and my claim was that mobile charge originates from every conductive surface in a circuit. In that activity, we created a charging circuit with a 3 cell battery pack, 2 round bulbs, and a capacitor, and then placed a compass under four different areas of the circuit and recorded whether or not there was a deflection. The procedure for the discharging circuit was similar, except there was no battery pack in that circuit and deflection was only measured at three places. I used the evidence of the the immediate compass deflection, the instantaneous and simultaneous lighting of the bulbs, and the movement of charge in a circuit without a battery pack to create a clear argument for mobile charge originating on all conductive surfaces in a