What is resistivity in S.I. units?

First, we know our equation for resistivity rho = RA/L. We know that L and A are in [m], which are already in SI units - however, [ohms] are not SI units. We do know, however, we know that R = V/I, and that V = W/Q, where Q=It. This gives us, V = [J]/[A][s], and [J] = [kg m2 s-2]. Plugging this back into our equation for rho = (V/I)(L/A) = [kgm2s-3A-1][m]/[A][m2], cancelling out gives us, [rho] = [kgm3*s-3*A-2].

LU
Answered by Laura U. Physics tutor

2279 Views

See similar Physics A Level tutors

Related Physics A Level answers

All answers ▸

A capacitor discharge circuit of time constant 45ms includes a capacitor and resistor. The capacitor has a capacitance of 18µF What is the resistance of the resistor?


What are Newton's 3 laws of motion?


Is light the fastest? if no, then explain quantum entanglement!


A DVD is dropped from rest. The DVD does not reach terminal velocity before it hits the ground. Explain how the acceleration of the DVD varies from the instant it is dropped until just before it hits the ground.


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences