calculate the resistivity in a 1.2m length of cylindrical wire with radius 1cm. The resistance of the wire is 0.01 kilo Ohms

The primary equation in this calculation is rho = RA/L Where rho is resistivity, A is cross sectional area, L is length, and R is resistance

The resistance and length are given in the question. Resistance however still needs to be converted to SI. This makes resistance 10 Ohms. At this point it would also be useful to convert radius into SI (0.01m).

To find area in a cylindrical wire from the radius, use A=pir^2 = 3.1410^-4

with all the components found in the correct units use rho=RA/L rho = 10 * 3.14 * 10^-4 / 1.2 = 2.6 * 10^-3 Ohm meters

Answered by Calum S. Physics tutor

3106 Views

See similar Physics A Level tutors

Related Physics A Level answers

All answers ▸

A ball is fired at an angle of 50 degrees with a velocity of 10 ms^-1, at what time does it first hit the floor?


Describe how the average density of matter in the universe affects its ultimate fate?


Imagine a ball rolls off a set of stairs with horizontal velocity, u; the stairs have a height, h and length of l. Find a formula for which step the ball will hit, n.


What is simple harmonic motion?


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences