SUMMARY
The resistance per meter of a constant wire with a diameter of 1.25 mm and a resistivity of 5 x 10-7 Ωm is calculated using the formula R = ρL/A. The cross-sectional area (A) of the wire is determined to be 1.2 x 10-6 m2. By substituting the values into the formula, one can derive the resistance per unit length, confirming the relationship between resistivity, length, and area in electrical resistance calculations.
PREREQUISITES
- Understanding of electrical resistance and Ohm's Law
- Familiarity with the concept of resistivity
- Basic knowledge of geometry for calculating area
- Ability to manipulate scientific notation
NEXT STEPS
- Learn about the relationship between resistivity and temperature in conductors
- Explore the derivation of the resistance formula R = ρL/A in detail
- Investigate the impact of wire diameter on electrical resistance
- Study practical applications of resistance calculations in circuit design
USEFUL FOR
Students studying electrical engineering, physics enthusiasts, and professionals involved in circuit design and analysis will benefit from this discussion.