Physics for Scientists and Engineers: Foundations and Connections
1st Edition
ISBN: 9781133939146
Author: Katz, Debora M.
Publisher: Cengage Learning
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Chapter 29, Problem 24PQ
(a)
To determine
The expression for current in each bulb for first and second circuit.
(b)
To determine
Explain the bulbs in order from brightness to dimmest.
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Two batteries with emf ℰ = 10 V and internal resistance r = 4 Ω and a resistor with R0 = 45 Ω are connected in series as shown in the figure.
a. Express the total resistance, R, in terms of r and R0.
b. Express the current, I, in terms of the emf, ℰ, and the total resistance, R.
c. Express the voltage, ΔV, across the resister in terms of I and R0.
d. Calculate the value of ΔV in volts.
Figure shows two circuits. The two batteries are identical and the four resistors all have exactly the same resistance.a. Compare ΔVab , ΔVcd , and ΔVef . Are they all the same? If not, rank them in order from largest to smallest. Explain.b. Rank in order, from largest to smallest, the five currents I1 to I5 . Explain.
A 10 V battery is wired in series with an uncharged capacitor, a resistor, and a switch to make an RC circuit. At t = 0 s the switch is closed. Shown is the current through the resistor.a. What is the value of the resistor?b. What is the value of the capacitor?
Chapter 29 Solutions
Physics for Scientists and Engineers: Foundations and Connections
Ch. 29.1 - What are the SI units of ?Ch. 29.1 - Prob. 29.2CECh. 29.2 - Prob. 29.3CECh. 29.4 - Prob. 29.5CECh. 29.4 - Prob. 29.6CECh. 29.5 - Prob. 29.7CECh. 29 - Study the symbols in Table 29.2. Then, without...Ch. 29 - Prob. 2PQCh. 29 - Prob. 3PQCh. 29 - Suppose you need to measure the potential...
Ch. 29 - Prob. 5PQCh. 29 - Prob. 6PQCh. 29 - A real battery (modeled as an ideal emf device in...Ch. 29 - Prob. 8PQCh. 29 - Two circuits made up of identical ideal emf...Ch. 29 - Prob. 10PQCh. 29 - Prob. 11PQCh. 29 - Prob. 12PQCh. 29 - Eight real batteries, each with an emf of 5.00 V...Ch. 29 - Prob. 14PQCh. 29 - Prob. 15PQCh. 29 - Prob. 16PQCh. 29 - Prob. 17PQCh. 29 - Prob. 18PQCh. 29 - Prob. 19PQCh. 29 - An ideal emf device with emf is connected to two...Ch. 29 - Prob. 21PQCh. 29 - Prob. 22PQCh. 29 - Prob. 23PQCh. 29 - Prob. 24PQCh. 29 - Prob. 25PQCh. 29 - Prob. 26PQCh. 29 - Determine the currents through the resistors R2,...Ch. 29 - The emf devices in the circuits shown in Figure...Ch. 29 - Prob. 29PQCh. 29 - Prob. 30PQCh. 29 - Prob. 31PQCh. 29 - Prob. 32PQCh. 29 - Prob. 33PQCh. 29 - Prob. 34PQCh. 29 - A Figure P29.35 shows a combination of six...Ch. 29 - A Each resistor shown in Figure P29.36 has...Ch. 29 - Each resistor shown in Figure P29.36 has a...Ch. 29 - Prob. 38PQCh. 29 - Prob. 39PQCh. 29 - The emf in Figure P29.40 is 4.54 V. The...Ch. 29 - Figure P29.41 shows three resistors (R1 = 14.0 ,...Ch. 29 - Figure P29.42 shows five resistors and two...Ch. 29 - The emfs in Figure P29.43 are 1 = 6.00 V and 2 =...Ch. 29 - Prob. 44PQCh. 29 - Figure P29.45 shows five resistors connected...Ch. 29 - Figure P29.46 shows a circuit with a 12.0-V...Ch. 29 - Two ideal emf devices are connected to a set of...Ch. 29 - Two ideal emf devices are connected to a set of...Ch. 29 - Three resistors with resistances R1 = R/2 and R2 =...Ch. 29 - Prob. 51PQCh. 29 - Prob. 52PQCh. 29 - Prob. 53PQCh. 29 - Prob. 55PQCh. 29 - At time t = 0, an RC circuit consists of a 12.0-V...Ch. 29 - A 210.0- resistor and an initially uncharged...Ch. 29 - Prob. 58PQCh. 29 - A real battery with internal resistance 0.500 and...Ch. 29 - Figure P29.60 shows a simple RC circuit with a...Ch. 29 - Prob. 61PQCh. 29 - Prob. 62PQCh. 29 - Prob. 63PQCh. 29 - Ralph has three resistors, R1, R2, and R3,...Ch. 29 - Prob. 65PQCh. 29 - An ideal emf device is connected to a set of...Ch. 29 - Prob. 67PQCh. 29 - An ideal emf device (24.0 V) is connected to a set...Ch. 29 - Prob. 69PQCh. 29 - What is the equivalent resistance between points a...Ch. 29 - A capacitor with initial charge Q0 is connected...Ch. 29 - Prob. 73PQCh. 29 - Prob. 74PQCh. 29 - Prob. 75PQCh. 29 - Prob. 76PQCh. 29 - Figure P29.77 shows a circuit with two batteries...Ch. 29 - In the RC circuit shown in Figure P29.78, an ideal...Ch. 29 - Prob. 79PQCh. 29 - Calculate the equivalent resistance between points...Ch. 29 - In Figure P29.81, N real batteries, each with an...Ch. 29 - Prob. 82PQCh. 29 - Prob. 83PQCh. 29 - Prob. 84PQCh. 29 - Figure P29.84 shows a circuit that consists of two...Ch. 29 - Prob. 86PQCh. 29 - Prob. 87PQCh. 29 - Prob. 88PQCh. 29 - Prob. 89PQCh. 29 - Prob. 90PQCh. 29 - Prob. 91PQCh. 29 - Prob. 92PQCh. 29 - Prob. 93PQCh. 29 - Prob. 94PQCh. 29 - Prob. 95PQ
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- The emf in Figure P29.40 is 4.54 V. The resistances are R1=13.0, R2=26.0, and R3=39.0 Find a. the current in each resistor, b. the power consumed by each resistor, and c. the power supplied by the emf device.arrow_forwardIn the circuit shown, the potential difference VA=VB=26.0 V and the resistance R1=R2=R3=R4=255 Ω. The arrows for currents IA and IB indicate the direction of positive current flow. The arrows do not necessarily indicate the direction of the actual current flow at those points. Determine the current ?A. Determine the current ?B.arrow_forwardA. What is the internal resistance of a 12.0-V car battery whose terminal voltage drops to 9.6 V when the starter motor draws 81 A ? B. What is the resistance of the starter?arrow_forward
- A battery with an emf of 15 V delivers 374.1 mA to a 35 Ω load. a. What is the internal resistance of the battery? b. What is its terminal potential difference when joined to this load?arrow_forwardIn the circuit pictured, the resistors have values of R1 = 170 Q, R, = 62 Q, and R3 = 130 Q, and the battery has an emf ɛ = 274 V. R R2 R3 A. How much current ibatt, in amperes, goes through the battery? B. What is the current i2, in amperes, through resistor R2?arrow_forward20. A circuit consists of a 100 v battery connected in series to a 20 resistor and two 2 F capacitors. The two capacitors are connected in parallel. What is the current out of the battery at t = 25 seconds? A. 1.3 A B. 2.8 A C. 3.7 A D. 4.1 A Thearrow_forward
- Current Iin flows into three resistors connected together one after the other as shown. The accompanying graph shows the value of the potential as a function of position.a. Is Iout greater than, less than, or equal to Iin ? Explain.b. Rank in order, from largest to smallest, the three resistances R1 , R2 , and R3. Explain.arrow_forwardAs shown, a single cell in a sample of tissue can be modeled by a circuit consisting of two resistors and a capacitor. RI is the resistance of the fluid in the cell’s interior, RE the resistance of the fluid surrounding the cell, and C the capacitance of the cell membrane.a. In one experiment, a 100 nA current I has been passing through the circuit for a long time. What is the potential difference across the capacitor?b. The current is suddenly turned off. How long does it take for the potential difference between points a and b to reach onehalf of its initial value?arrow_forwardA resistor R1 = 10 Ω is connected in parallel with a second resistor R2 = 4R1. This parallel configuration is then connected in series with R3 = R1/5 and across a cell with voltage V = 18 V. What is the current flowing through resistor R3? Select one: a. 1.25 A b. 4.0 A c. 1.8 A d. 360 mAarrow_forward
- A 5.0 F capacitor is charged to 12 V and placed in the RC circuit shown. At time t = 0 s, the switch is closed, allowing the capacitor to discharge into the 400 Q resistor. a. What is the time constant (in seconds) for this RC circuit? b. After how many time constants is the charge on the capacitor one-fourth of its initial value?arrow_forwardIn the circuit shown, R 1= 5Ω, R2 = 6 Ω, R3 = 7 Ω, E1 = 9 V, E2 = 5 V and E3 = 12 V.A. Solve for the currents I1,I2, and I3 using Kirchhoff’s rules.B. What is the potential difference Vaf ?arrow_forwardIn the circuit shown in the figure, both capacitors are initially charged to 45.0 V.a. How long after closing the switch S will the potential across each capacitor be reduced to10.0 V?b. What will be the current at that time?arrow_forward
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