"In the experiment to measure the capacitance (C) of a capacitor, the capacitance comes out to be 2800 microfarad and Resistance (R) = 6000 ohm. Find out the capacitive time constant." O 28.8 seconds O 16.8 seconds O 16.8 minutes O None of these

"In the experiment to measure the capacitance (C) of a capacitor, the capacitance comes out to be 2800 microfarad and Resistance (R) = 6000 ohm. Find out the capacitive time constant." O 28.8 seconds O 16.8 seconds O 16.8 minutes O None of these

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 39CQ: An electronic apparatus may have large capacitors at high voltage in the power supply section,...

See similar textbooks

Similar questions

An electronic apparatus may have large capacitors at high voltage in the power supply section, presenting a shock hazard even when the apparatus is switched off. A “bleeder resistor" is therefore placed across such a capacitor, as shown schematically in Figure 21.50, to bleed the charge from it after the apparatus is off. Why must the bleeder resistance be much greater than the effective resistance of the rest of the circuit? How does this affect the time constant for discharging the capacitor?
What is the smallest capacitor needed in a computer power supply in order to produce at least 4.05 V for 0.17 s after the power goes off? Assume that the resistance of all the components of the computer motherboard is 6 Ohms and that the capacitor and motherboard are powered with a 5-Volt power supply. For my answer I got .01706 F which was wrong, When I tried it again I got .03497 F which was also wrong. Can you please help?
To get the maximum current, the connection should be in parallel. If you create a parallel connection with 30V DC source and three resistors with R1 = 50Ω, R2 = 75Ω, and R3 = 100Ω, how do you calculate for the total current (IT) and the current flowing in each resistor (I1, I2, I3), and the total voltage (VT) and the voltage across each resistor (V1, V2, V3)? How do you also determine the power dissipated by each resistor (P1, P2, P3) and by the whole circuit (PT)??
Imagine a hypothetical universe where Ohm's law still holds true, but the nature of matter allows for electrical resistors to possess negative resistance values. In such a universe, how would the rules for combining resistors in series and parallel change? Furthermore, how could this altered physics influence the functioning of basic electrical circuits and energy conservation principles?
To get the minimum current, the connection should be in series. If you create a series connection with 30V DC source and three resistors with R1 = 50Ω, R2 = 75Ω, and R3 = 100Ω, how do you calculate for the total current (IT) and the current flowing in each resistor (I1, I2, I3), and the total voltage (VT) and the voltage across each resistor (V1, V2, V3)? How do you also determine the power dissipated by each resistor (P1, P2, P3) and by the whole circuit (PT)??
Your RL circuit has a characteristic time constant of 20.0 ns, and a resistance of 5.00 MΩ. What resistance would give you a 1.00 ns time constant, perhaps needed for quick response in an oscilloscope?
Hi, Here's my question. 26.45: An emf source (e=120 V), a resistor (R=80.0 W), and a capacitor (C=4.00 mF) are connected in series. As the capacitor charges, what is the magnitude of the charge on each plate of the capacitor when the current in the resistor is 0.900 A? Hint: From the information given, first calculate the voltage across the capacitor when the 0.900 A current flows in the circuit. Then use the voltage as a function of the time equation for a charging capacitor in an R-C circuit.
A Christmas light is made to flash via the discharge of a capacitor. The effective duration of the flash is 0.21 s (which you can assume is the time constant of the capacitor), during which it produces an average 35 mW from an average voltage of 2.85 V. What is the resistance, in ohms, of the light?
The student engineer of a campusradio station wishes to verifythe effectiveness of the lightningrod on the antenna mast(Fig. P18.57). The unknownresistance Rx is between pointsC and E. Point E is a “trueground” but is inaccessible fordirect measurement because the stratum in which it is located is several meters belowEarth’s surface. Two identical rods are driven into the groundat A and B, introducing an unknown resistance Ry. The procedurefor finding the unknown resistance Rx is as follows. Measureresistance R1 between points A and B. Then connect Aand B with a heavy conducting wire and measure resistance R2between points A and C. (a) Derive a formula for Rx in terms ofthe observable resistances R1 and R2. (b) A satisfactory groundresistance would be Rx < 2.0 Ω. Is the grounding of the stationadequate if measurements give R1 = 13 Ω and R2 = 6.0 Ω?
A 3.50 μμF capacitor that is initially uncharged is connected in series with a 7.60 kΩ resistor and an emf source with E=185 V negligible internal resistance. Just after the circuit is completed, what is the voltage drop across the capacitor? Just after the circuit is completed, what is the voltage drop across the resistor? Just after the circuit is completed, what is the charge on the capacitor? Just after the circuit is completed, what is the current through the resistor?
Hi, here's my question. 26.40: In the figure, a battery (e=36.0 V), resistor (120 W), and a capacitor (C=5.00 mF) are connected together. The switch S is closed at t=0. (a) When the voltage across the capacitor 8.00 V, what is the magnitude of the current across the circuit? (b) At what time t after the switch is closed is the voltage across the capacitor 8.00 V? (c) When the voltage across the capacitor is 8.00V, at what rate is energy being stored in the capacitor?
If C1=C2=C3 =2 μF , calculate the equivalent capacitances of the two circuits shown in thefigure. Are they the same?