Electrical Questions: Resistance, Resistor & Ohm's Law

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SUMMARY

This discussion focuses on fundamental electrical concepts, specifically resistance, resistors, and Ohm's Law. The first question addresses the calculation of resistance using the formula R=ρ(L/A) for two copper wires of the same length but different diameters. The second question involves interpreting resistor color bands to determine resistance value and tolerance, specifically for a resistor with blue, orange, green, and silver bands. Lastly, the discussion includes a comparison of a measured resistance of 6.522kΩ against a calculated value to determine the error percentage and validate Ohm's Law.

PREREQUISITES
  • Understanding of Ohm's Law and its applications
  • Familiarity with the formula R=ρ(L/A) for resistance calculation
  • Knowledge of resistor color coding and its interpretation
  • Basic skills in calculating percentage error
NEXT STEPS
  • Study the derivation and applications of Ohm's Law in electrical circuits
  • Learn how to calculate resistance using the resistivity formula R=ρ(L/A)
  • Explore resistor color code charts and practice decoding various resistor values
  • Investigate methods for calculating and interpreting percentage error in measurements
USEFUL FOR

This discussion is beneficial for electrical engineering students, hobbyists working with circuits, and anyone seeking to deepen their understanding of resistance and Ohm's Law in practical applications.

jensen91522
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i have some questions.

1. Given two pieces of copper wire which have same length but different diameters and based on equation R=ρ(L/A),determine the relative resistance of a piece of wire provided that its diameter is twice as long as that of the other one.

2. Given a resistor with bands 1=blue,2=orange,3=green,4=silver;find the resistance value and tolerance.

3. Comparing the measured 6.522kΩ with the calculated one , state the error percentage
and verify whether the Ohm's Law is correct.
 
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