Answered: At high frequencies, a capacitor…

Science

Physics

At high frequencies, a capacitor becomes a short circuit. Dis- cuss why this is so.

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter23: Electromagnetic Induction, Ac Circuits, And Electrical Technologies

Section: Chapter Questions

Problem 28CQ: If the capacitors in Figure 23.55 are replaced by inductors, which acts as a low-frequency fitter...

See similar textbooks

Similar questions

A 2.0-F capacitor is charged to a potential difference of 12.0 V and then connected across a 0.40-mH inductor. What is the current in the circuit when the potential difference across the capacitor is 6.0 V?
A radio receiver uses an RLC circuit to pick out particular frequencies to listen to in your house or car without hearing other unwanted frequencies. How would someone design such a circuit?
Presbycusis is a hearing loss due to age that progressively affects higher frequencies. A hearing aid amplifier is designed to amplify all frequencies equally. To adjust its output for presbycusis, would you put a capacitor in series or parallel with the hearing aid's speaker? Explain.
The self-inductance and capacitance of an oscillating LC circuit are L = 20 mH and C = 1.0 F , respectively. (a) What is the frequency of the oscillation? (b) If the maximum potential difference the plates of the capacitor is 50 V, what is the maximum current in the circuit?
Check Your Understanding The angular frequency of the oscillations in an LC circuit is 2.0103rad/s . (a) If L = 0.10H, what is C? (b) Suppose that at t = 0, all the is stored in the inductor. What is the value of ? (c) A second identical capacitor is connected in parallel with the original capacitor. What is the angular frequency of this circuit?
An RLC circuit consists of a 150- resistor, a 21.0-F capacitor, and a 466-mH inductor connected in series with a 120-V, 60.0-Hz power supply. (a) What is the phase angle between the current and the applied voltage? (b) Which reaches its maximum earlier, the current or the voltage?
The capacitor in Figure 23.55(b) will filler high—frequency signals by shorting them to earth/ground. (a) What capacitance is needed to produce a reactance of 10-0 m for a 5.00 kHz signal? (b) What would its reactance be at 3.00 Hz? (c) Discuss the implications of your answers to (a) and (b).
What capacitance should be used to produce a 2.00 M(reactance at 60.0 Hz?
In an LC circuit, what determines the frequency and the amplitude of the energy oscillations in either the inductor or capacitor?
Check Your Understanding In an RLC circuit, L = 5.0 mH, C=60F , and R=200 . (a) Is the circuit under damped, critically damped, or overdamped? (b) If the circuit starts oscillating with a charge of 3.0103C on the capacitor, how much energy has been dissipated in the resistor by the time the oscillations cease?
Suppose you have a supply of inductors ranging from 1.00 nH to 10.0 H, and capacitors ranging from 1.00 pF to 0.100 F. What is the range of resonant frequencies than can be achieved from combinations of a single inductor and a single capacitor?
A 20.0 HZ, 16.0 V source produces a 2.00 mA current when connected to a capacitor. What is the capacitance?