College Physics Neuron Capacitance EPCC
Show your work on a separate document. Block or highlight your answers. Limit your
esponses to within 3 sentences. Use your own sketches to help illustrate your
esponse if needed.
1. Refer to figure 1. How much charge is released (i.e. cu
ent) if during a neurological
eaction it discharges ions resulting in a drop in voltage from 600 mV to 480 mV?
2. Approximate how many ions were discharged in this process.
Figure 1: Neuron has a capacitance of
4.60x10-17 F. In the process of discharging, it
drops 20% of its original voltage in 1.50μs.
Credit: PBS
College Physics RC Circuits EPCC
Show your work on a separate document. Block or highlight your answers. Limit your
esponses to within 3 sentences. Use your own sketches to help illustrate your
esponse if needed.
1. Refer to figure 1. Calculate the time constant and the maximum cu
ent for the RC
circuit. Calculate voltage and cu
ent at 0.00s, 0.50s, 1.00s, 1.50s and 2.00s
2. Plot the results for the voltages and cu
ents calculated over time. What kind of
mathematical relationship do you notice between voltage and cu
ent: a direct or
inverse relationship?
Figure 1: RC circuit.
6.0 Ω
0.20 F
12.0 V