# Homework Help: Electrical: R-L Circuit issues

1. Nov 28, 2013

### Ryanyates1988

1. The problem statement, all variables and given/known data

Using circuit analysis calculate the inductance (L) within an electrical 50hz AC circuit containing a 12Ω resistor and inductive reactance of 5Ω which are in series.

2. Relevant equations

Inductive reactance:
XL = 2∏FL

Therefore inductance:
L = XL\2∏F

3. The attempt at a solution

Using my calculator I achieve the following:

L = (XL)\(2)(∏)(F)
L = 5Ω \ (2∏) x (50)
L = 5Ω \ 314.159
L = 0.0159 H
L = 15.9mH

I believe this value is correct.

2. Nov 28, 2013

### Staff: Mentor

Hi Ryanyates1988. http://img96.imageshack.us/img96/5725/red5e5etimes5e5e45e5e25.gif [Broken]

Your "\" is not a recognized engineering maths symbol. Regardless of what your calculator may use, you must express maths statements correctly in all other contexts, and include the necessary parentheses.

Last edited by a moderator: May 6, 2017
3. Nov 28, 2013

### Ryanyates1988

Hi Nascent,

Thank you for your reply. I will look up the symbols and post on my next questions.

Thanks!