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 solutionspile.com

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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

V_{L}

; then the capacitor discharges completely through the lamp and the lamp flashes briefly. For a lamp with breakdown voltage

V_{L} = 73.3 V

, wired to a

98.9 V

ideal battery and a

0.126 mF

capacitor, whs resistance

R

is needed for 3 flashes per second?

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