In the figure a, calculate the potential difference between a and c by considering a path that contains R = 8.42, rn=5.00, 81= 6.2 V.Take r2 and 82 to be 2.0 Q and 2.2 V respectively.%3DBattery 2Battery I12UnitsNumber The figure shows the circuit of a flashing lamp, like those attached to barrels at highway construction sites. The fluorescent lamp L (ofnegligible capacitance) is connected in parallel across the capacitor Cof an RC circuit. There is a current through the lamp only whenthe potential difference across it reaches the breakdown voltage V; then the capacitor discharges completely through the lamp andthe lamp flashes briefly. For a lamp with breakdown voltage V = 78.6 V, wired to a 95.2 V ideal battery and a O.193 mF capacitor, whatresistance Ris needed for 4 flashes per second?R.wwL.NumberiUnits

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In the figure a, calculate the potential difference between a and c by considering a path that contains R = 8.4Q, r = 5.0 0, 81 = 6.2 V. Take r2 and 82 to be 2.0 Q and 2.2 V respectively. Battery 1 Battery 2 Number Units

In the figure a, calculate the potential difference between a and c by considering a path that contains R = 8.4Q, r = 5.0 0, 81 = 6.2 V. Take r2 and 82 to be 2.0 Q and 2.2 V respectively. Battery 1 Battery 2 Number Units

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter21: Circuits And Dc Instruments

Section: Chapter Questions

Problem 71PE: Figure 21.55 shows how a bleeder resistor is used to discharge a capacitor after an electronic...

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Figure 21.55 shows how a bleeder resistor is used to discharge a capacitor after an electronic device is shut off allowing a person to work on the electronics with less risk of shock, (a) What is the time constant? (b) How long will it take to reduce the voltage on the capacitor to 0.250% (5% of 5%) of its full value once discharge begins? (c) If the capacitor is charged to a voltage V0through a 100-O resistance, calculate the time it takes to rise to 0.865V0(This is about two time constants.)
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