Electricity: Electric Circuits
Electric Circuits: Audio Guided Solution
Problem 5:
Determine the overall resistance of a 100-meter length of 14 AWA (0.163 cm diameter) wire made of the following materials.
a. copper (resistivity = 1.67x10-8 Ω•m)
b. silver (resistivity = 1.59x10-8 Ω•m)
c. aluminum (resistivity = 2.65x10-8 Ω•m)
d. iron (resistivity = 9.71x10-8 Ω•m)
a. copper (resistivity = 1.67x10-8 Ω•m)
b. silver (resistivity = 1.59x10-8 Ω•m)
c. aluminum (resistivity = 2.65x10-8 Ω•m)
d. iron (resistivity = 9.71x10-8 Ω•m)
Audio Guided Solution
Habits of an Effective Problem Solver
- Read the problem carefully and develop a mental picture of the physical situation. If necessary, sketch a simple diagram of the physical situation to help you visualize it.
- Identify the known and unknown quantities and record them in an organized manner. Equate given values to the symbols used to represent the corresponding quantity - e.g., ΔV = 9.0 V; R = 0.025 Ω; I = ???.
- Use physics formulas and conceptual reasoning to plot a strategy for solving for the unknown quantity.
- Identify the appropriate formula(s) to use.
- Perform substitutions and algebraic manipulations in order to solve for the unknown quantity.
Read About It!
Get more information on the topic of Electric Circuits at The Physics Classroom Tutorial.
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