Friday, April 13, 2012
for fun
http://autos.yahoo.com/blogs/motoramic/physicist-claims-victory-over-traffic-ticket-physics-paper-151808710.html
Thursday, April 12, 2012
AWednesday, April 11, 2012
HW
Related to yesterday's lab. Conceive of a way to determine internal resistance of a battery that we could test in class.Hooking the battery up to a multimeter directly doesn't count.
Tuesday, April 3, 2012
Circuits
1. Finish the problem from class, finding the currents everywhere in the circuit.
2. Let's consider a combination circuit. Two resistors (10 and 30 ohms) are in series. They are in series with a pair of resistors (60 and 120 ohms) in parallel with each other. Find the total resistance of the circuit and the individual currents and voltages for all resistors. Voltage is 20 V.
3. Consider three pairs of identical resistors (2, 4, 6, ohms). The pairs are in parallel, but these parallel pairs are in series with each other and with a 12-V battery. Solve for all currents and voltages.
4. If time allows, read about Kirchoff's rules for circuits. It's a different (and more useful) approach.
2. Let's consider a combination circuit. Two resistors (10 and 30 ohms) are in series. They are in series with a pair of resistors (60 and 120 ohms) in parallel with each other. Find the total resistance of the circuit and the individual currents and voltages for all resistors. Voltage is 20 V.
3. Consider three pairs of identical resistors (2, 4, 6, ohms). The pairs are in parallel, but these parallel pairs are in series with each other and with a 12-V battery. Solve for all currents and voltages.
4. If time allows, read about Kirchoff's rules for circuits. It's a different (and more useful) approach.
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