218 Chapt. 28 Circuits
Say we have just connected the circuit with the capacitor initially uncharged. What is
the formula for timezero (i.e., initial) current in terms quantities appearing in the formula
just given? At time inFnity, what is the formula for capacitor charge in terms quantities
appearing in the formula just given?
028 qfull 00840 3 5 0 tough thinking: nonohmic devices
14. Consider a generic device where current
I
through in the direction of the potential drop
V
across the device is a strictly increasing function of the potential drop
V
. ±or
V
= 0,
I
= 0. We
assume the device operates symmetrically whichever way the potential drop is placed across it.
a) The IV curve (currentversusvoltage curve AKA currentvoltage or IV characteristic) for
a device is a plot of current through versus voltage drop across. Since our generic device
behaves symmetrically, is the IV curve an even or odd function of
V
?
b) Sketch the
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 Fall '06
 Buchler
 Physics, Charge, Current, Incandescent light bulb, device, incandescent light bulbs

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