Resistance is the property of a substance by which it opposes the flow of current through it.
For a given body, the resistance is defined as the ratio of applied potential difference to the resulting current,
This property of the substance is due to frequent collisions of electrons with the atoms of the conductor.
SI unit of resistance is named ohm ) which is equivalent to V/A. Its dimensions areW(
[R] = .
For a given body, its resistance is found to be
That is, R µ L and R µ
or R µ = r
where r is a constant called resistivity.
The constant r is the characteristic of the material depends on its temperature of which the conductor is made. If L = unity and S = unity, then
R = r
It can also be defined as the resistance of a cube of material of side 1 m when current flows perpendicular to opposite faces.
The SI unit of resistivity is ohm metre (W m).
We are the leading online assignment help provider. Find answers to all of your doubts regarding the Resistance. Assignmenthelp.net provide homework, assignment help to the school, college or university level students. Our expert online tutors are available to help you in Resistance. Our service is focused on: time delivery, superior quality, creativity and originality.
Following are some of the areas in physics Electric Current which we provide help:
Electric Current Assignment Help | Electric Current Problem | Physics Online Tutor | Physics Assignment Help | Physics Tutors | Physics Homework Help | Physics Tutor | Physics Help | Physics Projects | Physics Problems | Physics Online Help | Physics Online Tutoring | High School Physics | Homework Tutor | Physics Experiments | Online Tutoring