# B Dimensions of Electric resistance

1. Aug 24, 2015

### Shivansh Mathur

Can I get the derivation of the dimensions of the physical quantity ELECTRIC RESISTANCE which is given by :-

A simple derivation is only required.
Thanks in advance.

2. Aug 24, 2015

### Qwertywerty

How have you tried approaching this ?

3. Aug 24, 2015

### f95toli

That does not look right to me...
Are you sure that is supposed to be the unit of electrical resistance (i.e. the ohm) expressed in SI base units?

4. Aug 25, 2015

### Shivansh Mathur

I am so sorry!
This is not the correct formula. The correct one is this-

Now can i get to know how we have arrived at this?
I saw this question in a competitive exam. I'm a student of class 10 with very basic knowledge in the subject. However, i know that this equation basically gives us the relation between resistance and various properties of the conductor.

seeking for a description about this thing called "dimension of ohms".

5. Aug 25, 2015

### SteamKing

Staff Emeritus
Start with Ohm's Law: V = I R

R - resistance in Ohms
V - voltage
I - current

If you look up the derived units for voltage and current, applying Ohm's Law will give you the basic units for Ohms.

6. Aug 26, 2015

### Shivansh Mathur

Ok i got a better way to do it. Have studied about the SI units and the derived units.
It has automatically taken me to the answer.
Thank you.

7. Apr 17, 2016

### SASANKA

V=iR
R=V/i=w/Qi=w/it.t=ML2T-2/I2T=ML2T-3I-2

8. Apr 17, 2016

### Staff: Mentor

This thread is from last year, please let it rest.

Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook