Physics
Physics, 05.05.2020 19:44, dansuba

Physics 7B FNTs due DL.8 camera flash is an example of a RC circuit. When the camera is turned on, the battery charges up a capacitor. When the capacitor can then press the shutter button, quickly discharging the capacitor through the flash. By pressing the shutter button, the photographer disconnects the capacitor from the voltage source. This also connects the charged capacitor to the camera flash resistor. is fully charged, usually indicated by a light on the camera, you a) Draw a RC circuit representing how the camera flash system works. Draw two voltage versus time graphs for this system, one showing the voltage across the capacitor when the it is charging and one for when it is discharging. Describe how the two plots are related. b) Based on your knowledge of exponential growth and decay, come up with the equation for charging and discharging the capacitor in the camera, given the battery, resistors, and capacitor. c) Given that flash resistor value is R= 3Q, and the capacitor has capacitance C-150μF, find the time constant t. d) e) Given the battery is ε=5V, find the time it takes for the fully charged capacitor to discharge by 1/3.

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Physics 7B FNTs due DL.8 camera flash is an example of a RC circuit. When the camera is turned on, t...

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