1. Inside of a radio, two capacitors in parrallel C1=420 μF and C2=920 μF are connected in parallel. They are both completely charged. If the charge on C2 is Q2=11 mC, what is the charge Q1 on C1?
2. A typical unmyelinated axon is 10 μm in diameter, with a 10 nm thick membrane. The resistivity of axoplasm is around 1 Ω · m. We'll take the membrane resistivity to be 108 Ω · m. Calculate values for Raxon and Rmem for each segment. Show all the work. (any values for a different axon?)
3. A 5-year old has nothing better to do than to connect three capacitors to a voltage source as shown. The capacitors have C1=57 mF, C2=66 mF, and C3=12 mF, respectively, and the voltage source has 1 Volts. What is the total capacitance?
What is the total energy stored in the capacitors?