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drpizza
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Question regarding the propogation of the e-field.. would it propogate at nearly the speed of light?
If a lightbulb were put on a circuit, with half a light year of cable coming from each terminal on the bulb and connected to a sufficient battery/power supply, 1/2 a year until the bulb turned on?
What would be a sufficient power supply?
What if the bulb were very close to the positive side of the battery, with one light year of superconducting cable between the bulb and the negative terminal on the battery? Vice versa?
(This question seems to be annoying a few people on a physics listserv for high school teachers.)
If a lightbulb were put on a circuit, with half a light year of cable coming from each terminal on the bulb and connected to a sufficient battery/power supply, 1/2 a year until the bulb turned on?
What would be a sufficient power supply?
What if the bulb were very close to the positive side of the battery, with one light year of superconducting cable between the bulb and the negative terminal on the battery? Vice versa?
(This question seems to be annoying a few people on a physics listserv for high school teachers.)