CHECKING YOUR UNDERSTANDING Directions: Solve for the given problems. Show your complete solutions. Express your final answers into 3 significant figures. 1. The terminal voltage of the battery in figure 4 is 16.6 V. What is the resistance R of the external resistor? What is the internal resistance r of the 18.0-V battery? 2. What should be the diameter of an aluminum ire forits resistance to be equal to

Inquiry into Physics
8th Edition
ISBN:9781337515863
Author:Ostdiek
Publisher:Ostdiek
Chapter7: Electricity
Section: Chapter Questions
Problem 27Q: (Indicates a review question, which means it requires only a basic understanding of the material to...
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Directions: Solve for the given problems. Show your complete solutions. Express your final answers into 3 significant figures.

 

  1. The terminal voltage of the battery in figure 4 is 16.6 V. What is the resistance R of the external resistor? What is the internal resistance r of the 18.0-V battery?

 

  1. What should be the diameter of an aluminum wire for its resistance to be equal to that of a copper wire which diameter is 2.17 mm? The two wires are of the same length.

ρ (Copper) = 1.68 x 10-8 Ωm

ρ (Aluminum) = 2.65 x 10-8 Ωm

CHECKING YOUR UNDERSTANDING
Directions: Solve for the given problems. Show your complete solutions. Express your
final answers into 3 significant figures.
1. The terminal voltage of the battery in figure 4 is 16.6 V. What is the resistance R of
the external resistor? What is the internal resistance r of the 18.0-V battery?
2. What should be the diameter of an aluminum wire forits resistance to be equal to
that of a copper wire which diameter is 2.17 mm? The two wires are of the same
length.
P (Copper) = 1.68 x 10-$ Qm
P (Aluminum) = 2.65 x 10-8 Qm
18.0 V
3.00 A
3.00 A
R
Figure 4. Circuit for Problem 1
Transcribed Image Text:CHECKING YOUR UNDERSTANDING Directions: Solve for the given problems. Show your complete solutions. Express your final answers into 3 significant figures. 1. The terminal voltage of the battery in figure 4 is 16.6 V. What is the resistance R of the external resistor? What is the internal resistance r of the 18.0-V battery? 2. What should be the diameter of an aluminum wire forits resistance to be equal to that of a copper wire which diameter is 2.17 mm? The two wires are of the same length. P (Copper) = 1.68 x 10-$ Qm P (Aluminum) = 2.65 x 10-8 Qm 18.0 V 3.00 A 3.00 A R Figure 4. Circuit for Problem 1
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