How long (in s) will it take an RC circuit made with a 50 Q resistor and a 20 mF capacitor to lose half its initial charge? Give your answer as only the numerical value in the SI units specified. e is interpreted as x10^ for use with large or small values; 1.01e2 is interpreted as 1.01 x 102
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- An initially uncharged capacitor of 697 x 10-6 F is connected to a resistor. When the circuit is connected to a source potential, it takes 7.43 s for the capacitor to become 81.8 % fully charged. What is the resistance of the resistor?A heart defibrillator being used on a patient has an RC time constant of 21.0 ms due to the resistance of the patient and the capacitance of the defibrillator. If the defibrillator has an 9.00 µF capacitance, what is the resistance of the path through the patient? resistance: If the initial voltage is 12.0 kV, how long does it take to decline to 687 V? time: SA 6.00 μF capacitor that is initially uncharged is connected in series with a 4600 resistor and a 507 V emf source with negligible internal resistance. Part A Just after the circuit is completed, what is the voltage drop across the capacitor? Express your answer in volts. 195| ΑΣΦ Vc = Submit Part B VR = Submit Just after the circuit is completed, what is the voltage drop across the resistor? Express your answer in volts. Part C Request Answer 20 = Submit VO ΑΣΦ | Request Answer V ? Just after the circuit is completed, what is the charge on the capacitor? Express your answer in coulombs. ΑΣΦ Request Answer ? V ? V C Review | Constants
- Early heart pacemakers used an RC circuit to stimulate the heart at regular intervals. A particular pacemaker is designed to operate at 70 beats per minute and sends a pulse to the heart every time the voltage across the capacitor reaches 9.0 volts. Assume that the capacitor discharges completely and instantly when it sends the pulse to the heart. If the RC circuit consists of a 12-V battery and a 50-microF capacitor, what is the resistance R of the resistor?A simple RC circuit has a switch, a resistor (R), and a capacitor (C) all wired together in series. Assuming the switch is open initially and capacitor is fully charged to a potential V and holds a charge Qo, which of the following expressions describes the current through the circuit at time t=RC after the switch is closed? I = Ve R Selected Answer: V² Answers: I RC I = V R.e I = RC·e V %3DAn RC circuit has a 11 F capacitor and a 0.5 ogm resistor. If the initial charge stored on the capacitor is 20 C then at what time will the charge be 2.5 C?
- A 391-Ω resistor, an uncharged 4.15-μF capacitor, and a 12.3-V emf are connected in series. How long, in ms, after the circuit is connected does the current in the resistor fall by 36.8% of its initial value?The RC circuit shown in (Figure 1) can be used in an artificial pacemaker to establish a normal heart rhythm by generating periodic electrical impulses. The box labeled "controller" behaves as an open circuit until the voltage drop across the capacitor reaches a preset limit. Once that limit is reached, the capacitor discharges its stored energy in the form of an electrical impulse to the heart, starts to recharge, and then the process repeats. Figure + Vs R m C + VC Part A Calculate the heart rate in beats per minute for R = 200 kn and C = 5.0 μF, if the capacitor discharges when its voltage reaches 80% of the source voltage Vs. Express your answer in beats per minute to three significant figures. H = Submit 17 ΑΣΦ V ↓↑ Request Answer < Return to Assignment vec Provide Feedback ? beats per minuteTwo capacitors are connected in series and a source voltage of 75 Volts is applied across the entire series configuration. If the resistors have values 120 and 50 micro- Farads, how much charge is on the 120 μF capacitor? Express your answer in micro- Coulombs (C).