EBK PHYSICS FOR SCIENTISTS & ENGINEERS
5th Edition
ISBN: 9780134296074
Author: GIANCOLI
Publisher: VST
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Textbook Question
Chapter 26, Problem 25P
(III) Consider the network of resistors shown in Fig. 26–43. Answer qualitatively: (a) What happens to the voltage across each resistor when the switch S is closed? (b) What happens to the current through each when the switch is closed? (c) What happens to the power output of the battery when the switch is closed? (d) Let R1 = R2 = R3 = R4 = 125 Ω and V = 22.0 V. Determine the current through each resistor before and after closing the switch. Are your qualitative predictions confirmed?
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(c) (i) In the circuit shown below, a 9 resistor and a 7.5 9 resistor are connected in
parallel. The combination is connected in series with a 5 2 resistor and a 11.5 V
power supply. Calculate: (A) the current in the 9 resistor; (B) the voltage drop
across each resistor; and (C) the joule heating in each resistor.
11.5 V
+lif
522
7.5 Ω
9Ω
(ii) In the circuit shown below, two batteries are connected opposing one another in
the circuit. There are also, two resistors in the circuit with values of 10 Q and 7 0
respectively. Calculate the total current in the circuit.
E1 = 9.5 V
ľį = 1.75
R1 = 10 Q
R2 = 7 2
E2 = 3.5 V
r2 = 2.5 Q
24. (III) Consider the network of resistors shown in Fig. 19–52.
Answer qualitatively: (a) What happens to the voltage across
each resistor when the switch S is closed? (b) What happens
to the current through each when the switch is closed?
(c) What happens to the power output of the battery when
the switch is closed? (d) Let R1 = R = R3 = R4 = 155 N
and V = 22.0 V. Determine the current through each resis-
tor before and after closing the switch. Are your qualitative
predictions confirmed?
R1
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S
R3
RA
R2
FIGURE 19-52
Problem 24.
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Chapter 26 Solutions
EBK PHYSICS FOR SCIENTISTS & ENGINEERS
Ch. 26 - Explain why birds can sit on power lines safely,...Ch. 26 - Discuss the advantages and disadvantages of...Ch. 26 - If all you have is a 120-V line, would it be...Ch. 26 - Two lightbulbs of resistance R1 and R2 (R2 R1)...Ch. 26 - Household outlets are often double outlets. Are...Ch. 26 - With two identical lightbulbs and two identical...Ch. 26 - If two identical resistors are connected in series...Ch. 26 - You have a single 60-W bulb on in your room. How...Ch. 26 - Compare and discuss the formulas for resistors and...Ch. 26 - When applying Kirchhoffs loop rule (such as in...
Ch. 26 - For what use are batteries connected in series?...Ch. 26 - Can the terminal voltage of a battery ever exceed...Ch. 26 - Explain in detail how you could measure the...Ch. 26 - In an RC circuit, current flows from the battery...Ch. 26 - Given the circuit shown in Fig. 2634, use the...Ch. 26 - What is the main difference between an analog...Ch. 26 - What would happen if you mistakenly used an...Ch. 26 - Explain why an ideal ammeter would have zero...Ch. 26 - A voltmeter connected across a resistor always...Ch. 26 - A small battery-operated flashlight requires a...Ch. 26 - (II) A 1.5-V dry cell can be tested by connecting...Ch. 26 - (I) Three 45- lightbulbs and three 65- lightbulbs...Ch. 26 - (III) Consider the network of resistors shown in...Ch. 26 - (III) You are designing a wire resistance heater...Ch. 26 - (III) Determine the time constant for charging the...Ch. 26 - Suppose that you wish to apply a 0.25-V potential...Ch. 26 - For the circuit shown in Fig. 2618a, show that the...Ch. 26 - A Wheatstone bridge is a type of bridge circuit...Ch. 26 - The internal resistance of a 1.35-V mercury cell...Ch. 26 - A solar cell, 3.0 cm square, has an output of 350...Ch. 26 - The current through the 20- resistor in Fig. 2669...
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