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circuit of a flashing lamp, lamp L (of negligible capa e is a current through the l wn voltage VL; then the ca

circuit of a flashing lamp, lamp L (of negligible capa e is a current through the l wn voltage VL; then the ca

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Number Units The figure shows the circuit of a flashing lamp, like those attached to barrels at highway construction sites. The fluorescent lamp L (of negligible capacitance) is connected in parallel across the capacitor C of an RC circuit. There is a current through the lamp only when the potential difference across it reaches the breakdown voltage VL; then the capacitor discharges completely through the lamp and the lamp flashes briefly. For a lamp with breakdown voltage VL = 66.9 V, wired to a 97.6 V ideal battery and a 0.104 mF capacitor, what resistance R is needed for 4 flashes per second?
Transcribed Image Text:Number Units The figure shows the circuit of a flashing lamp, like those attached to barrels at highway construction sites. The fluorescent lamp L (of negligible capacitance) is connected in parallel across the capacitor C of an RC circuit. There is a current through the lamp only when the potential difference across it reaches the breakdown voltage VL; then the capacitor discharges completely through the lamp and the lamp flashes briefly. For a lamp with breakdown voltage VL = 66.9 V, wired to a 97.6 V ideal battery and a 0.104 mF capacitor, what resistance R is needed for 4 flashes per second?
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