Homework Problems Physics 132: Section 8

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Homework Problems:

Interpretation of Problem Classification Icons

8 Electricity
8.1 The electric field
Problem name	Type	Features	Threads	Use
1. What's a field?
2. Charge on a neuron {*}
3. The infinite sheet model
4. The Faraday {*}
5. Dimensional analysis and electric fields {*}

8.2 The electric potential
Problem name	Type	Features	Threads	Use
1. Charges, fields, and potentials - simulation {*}
2. The big square: Connecting forces, fields, potential, and electric potential energy
3. The size of an oil drop {*}
4. Orienteering in an electric potential {*}
5. Field and potential near points and sheets {*}
6. The Millikan oil drop experiment (also 4.2.4.P15)
7. DImensions of electric quantities {*}
8. Electric field and potential from 4 charges {*}
9. Potential in a crystal
10. Potential near a long molecule {*}
11. Potential near a dipole {*}
12. Charges near the origin {*}
13. Details on dipoles {*}
14. Electric potential from a water molecule {*}

8.3 Electricity in matter
Problem name	Type	Features	Threads	Use
1. Electric potential in a cell membrane {*}
2. Counting charges on a cell membrane {*}
3. Electrophoresis
4. Shielding DNA {*}
5. Salting out and denaturing DNA
6. Debye length change {*}
7. Nernst potential essay {*}
8. Fields in a membrane
9. Nernst potential toy model {*}
10. Why Debye?
11. Electric fields in solution {*}

8.4 Capacitance
Problem name	Type	Features	Threads	Use
1. Capacitance in nerve cells {*}
2. Fields in a capacitor {*}
3. The power of a nerve {*}
4. Comparing capacitors {*}
4A. Comparing capacitors 2 {*}
4B. Comparing capacitors 3 {*}
5. Capacitors in series and parallel {*}
6. The energy stored in a capacitor {*}
6A. The energy stored in a capacitor-short {*}
7. Stuffing a capacitor {*}
8. Capacitance dimensions {*}
9. Capacitance of a membrane


8.5 Electric currents
Problem name	Type	Features	Threads	Use
1. Tracking round a circuit {} 1.A Tracking round a circuit 2 {}
2. Lots of batteries and a bulb {*}
3. Both ions moving {*}
4. Modeling a nerve membrane {*}
5. Cell membrane model {*}
6. Constant current source {*}
7. A battery and two bulbs {*}
8. A. A battery and four bulbs {} B. A battery and four bulbs - elaborate {}
9. The resistance of a pocket calculator {*}
10. What happens to the bulbs?
11. Ammeters and voltmeters {*}
12. Solar power for your house
13. Using Kirchhoff's laws {*}
14. Thinking about an ammeter and a voltmeter {*}
15. Jump starting a car {*}
16. Removing a bulb {*}
17. Contemplating Kirchhoff
18. Three bulbs and two batteries {*}
19. Throwing a switch {*}
20. Contemplating Ohm's law {*}
21. Mechanism in a resistor {*}
22. Defibrillators {*}
23. Seeing Kirchhoff's laws in a circuit {*}
24. Two batteries and three bulbs
25. The pi network {*}
26. Current flow analogies
27. Possible circuits {*}
28. Resistor vs capacitor {*}
29. Circuit model of a cell membrane {*}
30. Ranking for 3 resistors 2 batteries and a capacitor {*}