Modified Mastering Physics without Pearson eText-- Instant Access -- for Physics for Scientists & Engineers with Modern Physics
5th Edition
ISBN: 9780134402659
Author: GIANCOLI, Douglas
Publisher: PEARSON
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Textbook Question
Chapter 26, Problem 6Q
With two identical lightbulbs and two identical batteries, how would you arrange the bulbs and batteries in a circuit to get the maximum possible total power to the lightbulbs? (Assume the batteries have negligible internal resistance.)
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A circuit consists of two 100-kΩ resistors in series with an ideal 12.0-V battery.
(a) Calculate the potential drop across one of the resistors.
(b) A voltmeter with internal resistance 10.0 MΩ is connected in parallel with one of the two resistors to measure the potential drop across the resistor. By what percentage will the voltmeter reading deviate from the value you determined in part (a)? (Hint: The difference is rather small, so it is helpful to solve algebraically first to avoid a rounding error.)
Why would batteries with high current capacity have a lower internal resistance than batteries with a low current capacity? Consider the difference between 12 V car batteries and 12 V flashlight batteries. While both batteries supply the same voltage (12 V) of EMF, they have considerably different applications.
A circuit consists of two 100-kΩ resistors in series with an ideal 12.0-V battery.
Calculate the potential drop across one of the resistors.
A voltmeter with internal resistance 10.0 MΩ is connected in parallel with one of the two resistors to measure the potential drop across the resistor. By what percentage will the voltmeter reading deviate from the value you determined in part (a)? (Hint: The difference is rather small, so itis helpful to solve algebraically first to avoid a rounding error.)
Chapter 26 Solutions
Modified Mastering Physics without Pearson eText-- Instant Access -- for Physics for Scientists & Engineers with Modern Physics
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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