SUMMARY
The resistance of a calculator rated at 0.10 W when connected to a 1.50 V battery is calculated using the formula R = V²/P. Substituting the values, R = 1.5²/0.1 results in a resistance of 22.5 ohms. The discrepancy with the textbook answer of 22 ohms is attributed to significant figures. The correct approach confirms the calculation method and highlights the importance of precision in reporting results.
PREREQUISITES
- Understanding of Ohm's Law
- Familiarity with electrical power calculations
- Knowledge of significant figures in measurements
- Basic algebra skills for manipulating equations
NEXT STEPS
- Study Ohm's Law and its applications in circuit analysis
- Learn about electrical power formulas and their derivations
- Review the concept of significant figures in scientific calculations
- Explore practical examples of resistance calculations in electronics
USEFUL FOR
Students in physics or electrical engineering, educators teaching circuit theory, and anyone interested in understanding electrical resistance calculations.