free diagnosticupgrade

๐Ÿ’กap physics c: e&m review

R = ฯโ„“/A

Written by the Fiveable Content Team โ€ข Last updated August 2025
Verified for the 2027 exam
Verified for the 2027 examโ€ขWritten by the Fiveable Content Team โ€ข Last updated August 2025

Definition

The formula relating resistance to resistivity (ฯ), length (โ„“), and cross-sectional area (A) for a resistor with uniform geometry.

AP course connection

Topic 11.3: 11.3 Resistance, Resistivity, and Ohm's Law

Unit 11

Keep studying

Review this concept in 11.3 Resistance, Resistivity, and Ohm's LawAP Physics C: E&M course hub

R = ฯโ„“/A cheat sheet for homework

visual study aid

"R = ฯโ„“/A" also found in:

Subjects (1)

R = ฯโ„“/A Definition for AP Physics C: E&M | Fiveable