PHYSICS FOR SCI.AND ENGR W/WEBASSIGN
10th Edition
ISBN: 9781337888462
Author: SERWAY
Publisher: CENGAGE L
expand_more
expand_more
format_list_bulleted
Textbook Question
Chapter 27.2, Problem 27.2QQ
With the switch in the circuit of Figure 27.4a closed, there is no current in R2 because the current has an alternate zero-resistance path through the switch. There is current in R1, and this current is measured with the ammeter (a device for measuring current) at the bottom of the circuit. If the switch is opened (Fig. 27.4b), there is current in R2. What happens to the reading on the ammeter when the switch is opened? (a) The reading goes up. (b) The reading goes down. (c) The reading does not change.
Figure 27.4 (Quick Quiz 27.2) What happens when the switch is opened?
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
The capacitor in the circuit shown is fully charged by a 24 V battery. The switch is closed at t = 0. At sometime after
the switch is closed, the voltage across the capacitor is measured to be 10 V. What is the current in the circuit at
this time, in Ampere? C = 3.0 µF, and R = 2.0 02.
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.
Cil
in the circuit below, when the switch S is open, the current through R1is i1(open)= 1.636 A. When the switch is closed,this current changes to i1(closed)= 1.565 A. What are the emf and internal resistance of the battery?
In (Figure 1), the total resistance is 19.0 kΩ , and the battery's emf is 28.0 V . The time constant is measured to be 20.0 μs.
Calculate the total capacitance of the circuit.
Calculate the time it takes for the voltage across the resistor to reach 12.0 V after the switch is closed.
Chapter 27 Solutions
PHYSICS FOR SCI.AND ENGR W/WEBASSIGN
Ch. 27.1 - To maximize the percentage of the power from the...Ch. 27.2 - With the switch in the circuit of Figure 27.4a...Ch. 27.2 - With the switch in the circuit of Figure 27.6a...Ch. 27.2 - Prob. 27.4QQCh. 27.4 - Consider the circuit in Figure 27.17 and assume...Ch. 27 - Two 1.50-V batterieswith their positive terminals...Ch. 27 - As in Example 27.2, consider a power supply with...Ch. 27 - Figure P27.3 shows the interior of a three-way...Ch. 27 - Prob. 4PCh. 27 - Consider the two circuits shown in Figure P27.5 in...
Ch. 27 - Consider strings of incandescent lights that are...Ch. 27 - You are working at an electronics fabrication...Ch. 27 - In your new job at an engineering company, your...Ch. 27 - A battery with = 6.00 V and no internal...Ch. 27 - A battery with emf and no internal resistance...Ch. 27 - Todays class on current and resistance is about to...Ch. 27 - Why is the following situation impossible? A...Ch. 27 - Calculate the power delivered to each resistor in...Ch. 27 - For the purpose of measuring the electric...Ch. 27 - Four resistors are connected to a battery as shown...Ch. 27 - You have a faculty position at a community college...Ch. 27 - The circuit shown in Figure P27.17 is connected...Ch. 27 - The following equations describe an electric...Ch. 27 - Taking R = 1.00 k and = 250 V in Figure P27.19,...Ch. 27 - In the circuit of Figure P27.20, the current I1 =...Ch. 27 - (a) Can the circuit shown in Figure P27.21 be...Ch. 27 - For the circuit shown in Figure P27.22, we wish to...Ch. 27 - An uncharged capacitor and a resistor are...Ch. 27 - Show that the time constant in Equation 27.20 has...Ch. 27 - In the circuit of Figure P27.25, the switch S has...Ch. 27 - In the circuit of Figure P27.25, the switch S has...Ch. 27 - A 10.0-F capacitor is charged by a 10.0-V battery...Ch. 27 - Show that the integral 0e2t/RCdtin Example 27.11...Ch. 27 - You and your roommates are studying hard for your...Ch. 27 - Prob. 30PCh. 27 - Turn on your desk lamp. Pick up the cord, with...Ch. 27 - Four resistors are connected in parallel across a...Ch. 27 - Find the equivalent resistance between points a...Ch. 27 - The circuit in Figure P27.34a consists of three...Ch. 27 - The circuit in Figure P27.35 has been connected...Ch. 27 - The resistance between terminals a and b in Figure...Ch. 27 - (a) Calculate the potential difference between...Ch. 27 - Why is the following situation impossible? A...Ch. 27 - When two unknown resistors are connected in series...Ch. 27 - When two unknown resistors are connected in series...Ch. 27 - The circuit in Figure P27.41 contains two...Ch. 27 - Two resistors R1 and R2 are in parallel with each...Ch. 27 - A power supply has an open-circuit voltage of 40.0...Ch. 27 - A battery is used to charge a capacitor through a...Ch. 27 - An ideal voltmeter connected across a certain...Ch. 27 - (a) Determine the equilibrium charge on the...Ch. 27 - In Figure P27.47, suppose the switch has been...Ch. 27 - Figure P27.48 shows a circuit model for the...Ch. 27 - The student engineer of a campus radio station...Ch. 27 - A voltage V is applied to a series configuration...Ch. 27 - The switch in Figure P27.51a closes when Vc23Vand...
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
- In the circuit of Figure P27.25, the switch S has been open for a long time. It is then suddenly closed. Determine the time constant (a) before the switch is closed and (b) after the switch is closed. (c) Let the switch be closed at t = 0. Determine the current in the switch as a function of time. Figure P27.25 Problems 25 and 26.arrow_forwardIn (Figure 1), the total resistance is 12.0 kΩ , and the battery's emf is 26.0 V . The time constant is measured to be 14.0 μs . Calculate the total capacitance of the circuit. Calculate the time it takes for the voltage across the capacitor to reach 15.0 VV after the switch is closed.arrow_forwardAn initially charged capacitor has an initial voltage of V=40V and a capacitance of C=204µF and it is connected to a resistor of resistance R=4.34k2 as shown in the figure below. The switch is closed at r=0. Determine the current running in the circuit one time constant after the switch is closed. Express your answer in units of mA using one decimal place. S Yanıtınızı ekleyin C www ERarrow_forward
- With the switch in the circuit of 27.4a closed, there is no current in R2 because the current has an alternate zero-resistance path through the switch. There is current in R1, and this current is measured with the ammeter (a device for measuring current) at the bottom of the circuit. If the switch is opened (27.4b), there is current in R2. What happens to the reading on the ammeter when the switch is opened? (a) The reading goes up. (b) The reading goes down. (c) The reading does not change.arrow_forwardFor the circuit shown in the figure, C = 12 µF and R = 8.5 MΩ. Initially the switch S is open with the capacitor charged to a voltage of 80 V. The switch is then closed at time t = 0.00 s. What is the charge on the capacitor, when the current in the circuit is 3.3 µA?arrow_forwardYou connect a battery, a resistor, and a capacitor as shown in Figure 4, in that e = 36.0 V, C = 5.0 uF and R = 120 Ohms C. The switch S is closed at t = 0. (a) When the voltage across the capacitor is 8.00 V, what is the magnitude of the current in the circuit? (b) At what time t after the switch is closed the voltage across the capacitor is equal to 8.00 V? (c) When the voltage across the capacitor equals 8.00 V, at what speed is energy being stored in the capacitor? Translation: "Chave aberta" = switch openarrow_forward
- The capacitor, C1 = 1.2 pF, in the circuit below begins with no stored charge. At t = 0 seconds, the switch is closed. What is the current (in mA) through the resistor, R1 = 9.1 MQ, at t = 4.2 usec? R1 +12V wwarrow_forwardThe emfs in the figure below are & = 5.00 V and Ɛ2 = 18.0 V. The resistances are R1 = 17.5 0, R2 = 32. N, R3 = 46.0 N, and R4 = 59.0 N. Find the magnitude of the current in each resistor when the switch is in the following states. R2 R4 R1 S R3 (а) оpen I = A I2 = A I3 = A I4 = A (b) closed I = A I2 = A I3 = A I4 = Aarrow_forwardFor the circuit shown in the figure, C = 12 µF and R = 8.5 MQ. Initially the switch S is open with the capacitor charged to a voltage of 80 V. The switch is then closed at time t = 0.00 s. What is the charge on the capacitor when the current in the circuit is 3.3 HA? Hint: Use the current discharge equation to find the time. Then put that time into the discharge function for the charge on the capacitor. O 340 uc Ο 480 μc O 620 uC Ο 700 μC O 350 ucarrow_forward
- A battery with emf ? and no internal resistance supplies current to the circuit shown in the figure below. When the double-throw switch S is open, the current in the battery is I0. When the switch is closed in position a, the current in the battery is Ia. When the switch is closed in position b, the current in the battery is Ib. Find the resistances (a) R1, (b) R2, and (c) R3.arrow_forwardFor the circuit in the figure, at t = 0 the switch S is closed with the capacitor uncharged. If C = 52 µF, & = 80V, and R = 4 k2, what is the charge (in m) on the capacitor when the current in the circuit is I = 2.5 mA? S R Select one: OA 5.56 O B. 2.55 OC.4.13 OD. 4.68 OE. 3.64arrow_forwardA circuit with a resistance R = 88 Ω is connected to a battery with potential difference across the terminals of ΔV = 6.5 V. a. Input an expression for the current passing through the circuit, I. (b) What is the current in milliamps, mA? (c) If the resistance of the circuit was increased by a factor of ten, Rnew = 10R, what is the new current in milliamps, mA?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Physics for Scientists and Engineers with Modern ...PhysicsISBN:9781337553292Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningPhysics for Scientists and EngineersPhysicsISBN:9781337553278Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
Physics for Scientists and Engineers with Modern ...
Physics
ISBN:9781337553292
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Physics for Scientists and Engineers
Physics
ISBN:9781337553278
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
What is Electromagnetic Induction? | Faraday's Laws and Lenz Law | iKen | iKen Edu | iKen App; Author: Iken Edu;https://www.youtube.com/watch?v=3HyORmBip-w;License: Standard YouTube License, CC-BY