# Can Inductive reactance be Calculated?

Discussion in 'Homework Help' started by JDR04, Aug 20, 2012.

1. ### JDR04 Thread Starter Active Member

May 5, 2011
339
4
The question I am posed is "What is the inductive impedance of a circuit that has a 300mH inductor and a 2.7Mohm resistor connected in series". I'm given no voltages or frequencies either. Could somebody show me how to calculate this out please. Thanks a lot JDR04

2. ### KL7AJ AAC Fanatic!

Nov 4, 2008
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Without frequency, it CANNOT be calculated.

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3. ### ugge77 New Member

Aug 19, 2012
1
1
The only possible answer to this question is a function of frequency (f) or angular frequency, not a discrete value.

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4. ### JDR04 Thread Starter Active Member

May 5, 2011
339
4
Sorry guys, gave you the wrong information. Its INDUCTIVE IMPEDANCE that is required and not inductave reactance as I originally posted.

5. ### Papabravo Expert

Feb 24, 2006
10,340
1,850
Sorry. Same problem. You get to impedance, a complex quantity, by adding the real part (resistance) to the imaginary part (reactance), and it is still a function of frequency. You need to take a step back and review your basic definitions and understanding.

6. ### #12 Expert

Nov 30, 2010
16,705
7,355
Xl=2PiFL
(That's the simple form.)

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7. ### JDR04 Thread Starter Active Member

May 5, 2011
339
4
Thanks papabravo, my tutor has since told me that a mistake in the question was made by not including the frequency for the calculation. Now I'll look at it again and see if I can figure it out. Thanks for your help anyway -JDR04