College Physics
OER 2016 Edition
ISBN: 9781947172173
Author: OpenStax
Publisher: OpenStax College
expand_more
expand_more
format_list_bulleted
Videos
Textbook Question
Chapter 21, Problem 67PE
After two time constants, what percentage of the final voltage, emf, is on an initially uncharged capacitor C, charged through a resistance R ?
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
A circuit has a 18.8 pF capacitor, a 39.6 pF capacitor and a 33.1 pf capacitor in series with each other. What is the equivalent capacitance (in pico-Farads) of these three capacitors?
A circuit has a 51.2 pF capacitor, a 27.4 pF capacitor and a 71.1 pF capacitor in parallel with each other. What is the equivalent capacitance (in pico-Farads) of these three capacitors?
A capacitor with capacitance C = 5 µF is charged to a voltage V = 10V. It is then discharged through a resistor R=2 MQ.
At what time after the start of the discharge process has the voltage across the capacitor fallen to 1V?
Chapter 21 Solutions
College Physics
Ch. 21 - Prob. 1CQCh. 21 - Prob. 2CQCh. 21 - Prob. 3CQCh. 21 - Prob. 4CQCh. 21 - Prob. 5CQCh. 21 - Knowing that the severity of a shock depends on...Ch. 21 - Would your headlights dim when you start your...Ch. 21 - Some strings of holiday lights are wired in series...Ch. 21 - If two household lightbulbs rated 60 W and 100 W...Ch. 21 - Suppose you are doing a physics lab that asks you...
Ch. 21 - Before World War II, some radios got power through...Ch. 21 - Some light bulbs have three power settings (not...Ch. 21 - Is every emf a potential difference? Is every...Ch. 21 - Prob. 14CQCh. 21 - Given a battery, an assortment of resistors, and a...Ch. 21 - Two different 12-V automobile batteries on a store...Ch. 21 - What are the advantages and disadvantages of...Ch. 21 - Semitractor trucks use four large 12-V batteries....Ch. 21 - Prob. 19CQCh. 21 - Prob. 20CQCh. 21 - Prob. 21CQCh. 21 - Prob. 22CQCh. 21 - Prob. 23CQCh. 21 - Prob. 24CQCh. 21 - Suppose you are using a multimeter (one designed...Ch. 21 - Prob. 26CQCh. 21 - Prob. 27CQCh. 21 - Why can a null measurement be more accurate than...Ch. 21 - If a potentiometer is used to measure cell emfs on...Ch. 21 - Regarding the units involved in the relationship t...Ch. 21 - The RC time constant in heart defibrillation is...Ch. 21 - When making an ECG measurement, it is important to...Ch. 21 - Prob. 33CQCh. 21 - Prob. 34CQCh. 21 - Prob. 35CQCh. 21 - Prob. 36CQCh. 21 - A long, inexpensive extension cord is connected...Ch. 21 - Prob. 38CQCh. 21 - Prob. 39CQCh. 21 - (a) What is the resistance often 275-O resistors...Ch. 21 - (a) What is the resistance of a 1.00 102-O, a...Ch. 21 - What are the largest and smallest resistances you...Ch. 21 - An 1800-W toaster, a 1400-W electric frying pan,...Ch. 21 - Your car’s 30.0-W headlight and 2.40-kW starter...Ch. 21 - (a) Given a48.0-V battery and 24.0-O and 96.0-O...Ch. 21 - Referring to the example combining series and...Ch. 21 - Referring to Figure 21.6: (a) Calculate P3 and...Ch. 21 - Refer to Figure 21.7 and the discussion of lights...Ch. 21 - Prob. 10PECh. 21 - Show that if two resistors R1and R2are combined...Ch. 21 - Unreasonable Results Two resistors, one having a...Ch. 21 - Unreasonable Results Two resistors, one having a...Ch. 21 - Standard automobile batteries have six lead-acid...Ch. 21 - Car bon-zinc dry cells (sometimes referred to as...Ch. 21 - What is the output voltage of a 3.0000-V lithium...Ch. 21 - (a) What is the terminal voltage of a large 1.54-V...Ch. 21 - What is the internal resistance of an automobile...Ch. 21 - (a) Find the terminal voltage of a 12.0-V...Ch. 21 - A car battery with a 12-V emf and an internal...Ch. 21 - The hot resistance of a flashlight bulb is 2.30 ,...Ch. 21 - The label or a portable radio recommends the use...Ch. 21 - An automobile starter motor has an equivalent...Ch. 21 - A child’s electronic toy is supplied by three...Ch. 21 - (a) What is the internal resistance of a voltage...Ch. 21 - A person with body resistance between his hands of...Ch. 21 - Electric fish generate current with biological...Ch. 21 - Integrated Concepts A 12.0-V emf automobile...Ch. 21 - Unreasonable Results A 1.58-V alkaline cell with a...Ch. 21 - Unreasonable Results (a) What is the internal...Ch. 21 - Prob. 31PECh. 21 - Prob. 32PECh. 21 - Verify the second equation in Example 21.5 by...Ch. 21 - Verify the third equation in Example 21.5 by...Ch. 21 - Prob. 35PECh. 21 - Prob. 36PECh. 21 - Prob. 37PECh. 21 - Prob. 38PECh. 21 - Solve Example 21.5, but use loop abcdefgha instead...Ch. 21 - Prob. 40PECh. 21 - Prob. 41PECh. 21 - What is the sensitivity of the galvanometer (that...Ch. 21 - What is the sensitivity of the galvanometer (that...Ch. 21 - Find the resistance that must be placed in series...Ch. 21 - Find the resistance that must be placed in series...Ch. 21 - Find the resistance that must be placed in series...Ch. 21 - Find the resistance that must be placed in...Ch. 21 - Find the resistance that must be placed in series...Ch. 21 - Find the resistance that must be placed in...Ch. 21 - Prob. 50PECh. 21 - Suppose you measure the terminal voltage of a...Ch. 21 - A certain ammeter has a resistance of 5.00X10-5 ...Ch. 21 - A 1,00-?O voltmeter is placed in parallel with a...Ch. 21 - A 0.0200- ammeter is placed in series with a...Ch. 21 - Unreasonable Results Suppose you have a 40.0-...Ch. 21 - Unreasonable Results (a) What resistance would you...Ch. 21 - What is the emf x of a cell being measured in a...Ch. 21 - Calculate the emfx of a dry cell for which a...Ch. 21 - When an unknown resistance Rxis placed in a...Ch. 21 - To what value must you adjust R3to balance a...Ch. 21 - (a) What is the unknown emfx in a potentiometer...Ch. 21 - Suppose you want to measure resistances in the...Ch. 21 - The timing device in an automobile’s intermittent...Ch. 21 - A heart pacemaker fires 72 times a minute, each...Ch. 21 - The duration of a photographic flash is related to...Ch. 21 - A 2.00- and a 7.50-F capacitor can be connected in...Ch. 21 - After two time constants, what percentage of the...Ch. 21 - A 500- resistor, an uncharged 1.50-F capacitor and...Ch. 21 - A heart defibrillator being used on a patient has...Ch. 21 - An ECG monitor must have an RC time constant less...Ch. 21 - Prob. 71PECh. 21 - Using the exact exponential treatment, find how...Ch. 21 - Using the exact exponential treatment, find how...Ch. 21 - Integrated Concepts If you wish to take a picture...Ch. 21 - Integrated Concepts A flashing lamp in a Christmas...Ch. 21 - Integrated Concepts A 160F capacitor charged to...Ch. 21 - Unreasonable Results (a) Calculate the capacitance...Ch. 21 - Construct Your Own Problem Consider a camera's...Ch. 21 - Construe! Your Own Problem Consider a rechargeable...Ch. 21 - Prob. 1TPCh. 21 - Prob. 2TPCh. 21 - Prob. 3TPCh. 21 - Prob. 4TPCh. 21 - Prob. 5TPCh. 21 - Prob. 6TPCh. 21 - Prob. 7TPCh. 21 - Prob. 8TP
Additional Science Textbook Solutions
Find more solutions based on key concepts
50. A 5.00-mL sample of an solution of unknown concentration is titrated with a 0.1090 M NaOH solution. A volu...
Introductory Chemistry (6th Edition)
16. A 200 g mass attached to a horizontal spring oscillates at a frequency of 2.0 Hz. At , the mass is at and ...
Physics for Scientists and Engineers: A Strategic Approach, Vol. 1 (Chs 1-21) (4th Edition)
7. Both Tim and Jan (problem 6) have a widow’s peak (see Module 9.8), but Mike has a straight hairline. What ar...
Campbell Biology: Concepts & Connections (9th Edition)
How is a mailing address analogous to biologys hierarchical classification system?
Campbell Biology in Focus (2nd Edition)
Fibrous connective tissue consists of ground substance and fibers that provide strength, support, and flexibili...
Human Biology: Concepts and Current Issues (8th Edition)
For the generic equilibrium HA(aq) ⇌ H + (aq) + A- (aq), which of these statements is true?
The equilibrium con...
Chemistry: The Central Science (14th Edition)
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- A circuit includes a capacitor that charges over time. If the resistance of the circuit is 3.0 Ω, the capacitance is 2.2 F, and the potential of the circuit is 5.0 V, what is the charge on the capacitor after a time of 10.0 seconds, assuming the capacitor is initially uncharged?arrow_forwardIn the circuit below, C1 = 1.64 x 10-6 F and R1 = 41.0 Ohms. The capacitor is initially charged , how much time passes after the switch is closed before the capacitor reaches 8.5 % of its initial value? Please give your answer in microseconds, 1 microsecond= 10-6 s.arrow_forwardIf it is required to store 32.9 μC of electric charge in a capacitor in an electric circuit, what should the capacitance of the capacitor be if a voltage supply can apply 4.0 V of voltage to the capacitor? Report the number in the unit of μFarrow_forward
- EMF = Vo = 6 volts. and C = 5 μF Calculate the theoretical value of the charge (q) in the capacitor during charging at t = RC. Use equation 3.arrow_forwardThe voltage across a 2.5-µF capacitor in a copying machine is zero. What is the voltage after 15 ms if a current of 25 mA charges the capacitor? The voltage at t = 15 ms is V. (Type an integer or a decimal.)arrow_forwardIf it takes 5 s for a capacitor to charge to half the battery voltage, through a 10k Ω resistor, what is the capacitance C?arrow_forward
- Differential Equations: Electric Circuits When a resistance R (ohms) and a capacitance C (farads) are connected in series with an emf E (volts), the current I (amperes) is given by the equation: dE 1 R- +-I = dtC dI C dt If R = 1000 ohms, C = 5x10-4farad.and I t = 1 second and E = 100 volts. a. 1.35 amperes b. 2.35 amperes c. 3.35 amperes d. 4.35 amperes 10 amperes for t = 0, find the current forarrow_forwardIf a constant current of 1.0 mA were to flow into a 200 µF (microfarad) capacitor, what would be the voltage across the capacitor after 3 seconds?arrow_forwardA 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?arrow_forward
- Three capacitors are connected in series in a circuit and the individual capacitance values are 2.4 µF, 5.6 µF, and 3.5 µF. Determine the equivalent capacitance for the circuit.arrow_forwardIn the circuit below the value of the resistance 14 Ω and the value of the capacitance is 2.0 µF. The voltage of the battery is 50 V. The capacitor is initially uncharged. Sometime after the switch is closed, the current in the circuit is measured to be 1.1 A. At this time, what is the charge on the capacitor, in µC? Your answer needs to have 2 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement.arrow_forwardA large capacitor of 3000 µF is charged by a constant current. After 1 minute it reaches a voltageof 100 V. At that voltage, the charging circuit is disconnected.a) Calculate the charging current.b) A second identical capacitor is connected across the capacitor, using wires with 1 kΩ resistance. Sketch a graph of the voltages on the two capacitors as a function of time, withappropriate numbers and units marked on the axes.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
College PhysicsPhysicsISBN:9781938168000Author:Paul Peter Urone, Roger HinrichsPublisher:OpenStax College
College Physics
Physics
ISBN:9781938168000
Author:Paul Peter Urone, Roger Hinrichs
Publisher:OpenStax College
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