Some camera flashes use flash tubes that requite a high voltage. They obtain a high voltage by charging capacitors in parallel and then internally changing the connections of the capacitors to place diem in series. Consider a circuit that uses four AAA batteries connected in series to charge six 10-mF capacitors through an equivalent resistance of 100 Ω . The connections are thenswitched internally to place the capacitors in series. The capacitors discharge through a lamp with a resistance of 100 Ω . (a) What is the RC time constant and the initialcurrent out of the batteries while they are connected in parallel? (b) How long does it take for the capacitors to charge to 90% of the terminal voltages of the batteries? (c) What is the RC time constant and the initial current of the capacitors connected in series assuming it discharges at 90% of full charge? (d) How long does it rake the current to decrease to 10% of the initial value?
Some camera flashes use flash tubes that requite a high voltage. They obtain a high voltage by charging capacitors in parallel and then internally changing the connections of the capacitors to place diem in series. Consider a circuit that uses four AAA batteries connected in series to charge six 10-mF capacitors through an equivalent resistance of 100 Ω . The connections are thenswitched internally to place the capacitors in series. The capacitors discharge through a lamp with a resistance of 100 Ω . (a) What is the RC time constant and the initialcurrent out of the batteries while they are connected in parallel? (b) How long does it take for the capacitors to charge to 90% of the terminal voltages of the batteries? (c) What is the RC time constant and the initial current of the capacitors connected in series assuming it discharges at 90% of full charge? (d) How long does it rake the current to decrease to 10% of the initial value?
Some camera flashes use flash tubes that requite a high voltage. They obtain a high voltage by charging capacitors in parallel and then internally changing the connections of the capacitors to place diem in series. Consider a circuit that uses four AAA batteries connected in series to charge six 10-mF capacitors through an equivalent resistance of
100
Ω
. The connections are thenswitched internally to place the capacitors in series. The capacitors discharge through a lamp with a resistance of
100
Ω
. (a) What is the RC time constant and the initialcurrent out of the batteries while they are connected in parallel? (b) How long does it take for the capacitors to charge to 90% of the terminal voltages of the batteries? (c) What is the RC time constant and the initial current of the capacitors connected in series assuming it discharges at 90% of full charge? (d) How long does it rake the current to decrease to 10% of the initial value?
A capacitor with capacitance 10.8 μF in an RC circuit is initially charged up to a voltage of Vo = 17.8 V. The capacitor is then discharged using a resistor, whose resistance is 185 kΩ. During the discharging process, after how long will the capacitor be left with 15% of its maximum charge?
A 2.1-µF capacitor is charged to 12 V and then discharged through a 4.9×106 Ω resistor. How long (in seconds) will it take for the voltage across the capacitor to drop to 3.7 V?
A capacitor with capacitance C = 5 μF is charged to a voltage V = 10V. It is then discharged through a resistor R = 2 MΩ.
At what time after the start of the discharge process has the voltage across the capacitor fallen to 1V?
Select one:
a. 230 msecs
b. 23 secs
c. 10 secs
d. 100 msecs
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DC Series circuits explained - The basics working principle; Author: The Engineering Mindset;https://www.youtube.com/watch?v=VV6tZ3Aqfuc;License: Standard YouTube License, CC-BY