The label on a battery-powered radio recommends the use of a rechargeable nickel-cadmium cell (nicads), although it has a 1.25-V open-circuit voltage, whereas an alkaline cell has a 1.58-V open-circuit voltage. The radio has a 3.20 resistance. Hint Review Section 10.1 Electromotive Force for the description of internal resistance, and how the voltage across the load can be determined given the open-circuit voltage ("emf") and internal resistance. a. With a nicad cell, having an internal resistance of 0.04 02, what is the voltage supplied to the radio, if a single nicad cell is used? The voltage supplied to the radio is b. With an alkaline cell, having an internal resistance of 0.2 0, what is the voltage supplied to the radio, if a single alkaline cell is used? The voltage supplied to the radio is V. c. The radio's effective resistance is lowered when its volume is turned up. At what value of radio's resistance does a nicad cell begin to supply a greater voltage to the radio than an alkaline cell? When the radio has an effective resistance of can be obtained with a nicad cell. V. Hint for (c) Use your work from (a) and (b). What the question is asking here is, treating the resistance of the radio as a variable (x), set the expressions for answers to (a) and (b) equal to each other and solve for . Submit Question or smaller, a greater voltage
The label on a battery-powered radio recommends the use of a rechargeable nickel-cadmium cell (nicads), although it has a 1.25-V open-circuit voltage, whereas an alkaline cell has a 1.58-V open-circuit voltage. The radio has a 3.20 resistance. Hint Review Section 10.1 Electromotive Force for the description of internal resistance, and how the voltage across the load can be determined given the open-circuit voltage ("emf") and internal resistance. a. With a nicad cell, having an internal resistance of 0.04 02, what is the voltage supplied to the radio, if a single nicad cell is used? The voltage supplied to the radio is b. With an alkaline cell, having an internal resistance of 0.2 0, what is the voltage supplied to the radio, if a single alkaline cell is used? The voltage supplied to the radio is V. c. The radio's effective resistance is lowered when its volume is turned up. At what value of radio's resistance does a nicad cell begin to supply a greater voltage to the radio than an alkaline cell? When the radio has an effective resistance of can be obtained with a nicad cell. V. Hint for (c) Use your work from (a) and (b). What the question is asking here is, treating the resistance of the radio as a variable (x), set the expressions for answers to (a) and (b) equal to each other and solve for . Submit Question or smaller, a greater voltage
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Transcribed Image Text:The label on a battery-powered radio recommends the use of a rechargeable nickel-cadmium cell (nicads),
although it has a 1.25-V open-circuit voltage, whereas an alkaline cell has a 1.58-V open-circuit voltage.
The radio has a 3.2 0 resistance.
Hint
Review Section 10.1 Electromotive Force for the description of internal resistance, and how the voltage
across the load can be determined given the open-circuit voltage ("emf") and internal resistance.
a. With a nicad cell, having an internal resistance of 0.04 02, what is the voltage supplied to the radio, if
a single nicad cell is used?
The voltage supplied to the radio is
b. With an alkaline cell, having an internal resistance of 0.2 0, what is the voltage supplied to the
radio, if a single alkaline cell is used?
The voltage supplied to the radio is
c. The radio's effective resistance is lowered when its volume is turned up. At what value of radio's
resistance does a nicad cell begin to supply a greater voltage to the radio than an alkaline cell?
When the radio has an effective resistance of
can be obtained with a nicad cell.
Hint for (c)
Use your work from (a) and (b). What the question is asking here is, treating the resistance of the
radio as a variable (x), set the expressions for answers to (a) and (b) equal to each other and solve
for .
Submit Question
V.
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Q or smaller, a greater voltage
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