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Old 04-04-2019, 07:45 AM   #1
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on a recent master electrician exam they asked the following question. Is resistance, reactance and inductive reactance impedance? I thought no. Was i mistaken?
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Old 04-04-2019, 08:05 AM   #2
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impedance is the net vector sum of resistance and reactance (inductive and capacitive). I think the question is terribly worded, but you are wrong.
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Old 04-04-2019, 08:07 AM   #3
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The vector sum of reactance (both kinds) and resistance is impedance... But they said "resistance, reactance, and inductive reactance", so they might be trying to trick you with the wording.
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Old 04-04-2019, 12:26 PM   #4
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Impedance=resistance+capacitive reactance+inductive reactance
resistance is from resistors
capacitive reactance is from capacitors
inductive reactance is from inductors
You can google these terms.


Maybe this helps...
Impedance=(resistance)+(capacitive reactance)+(inductive reactance)
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Old 04-04-2019, 12:37 PM   #5
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Quote:
Originally Posted by greenlee View Post
on a recent master electrician exam they asked the following question. Is resistance, reactance and inductive reactance impedance? I thought no. Was i mistaken?
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Originally Posted by sparkiez View Post
impedance is the net vector sum of resistance and reactance (inductive and capacitive). I think the question is terribly worded, but you are wrong.
Agreed, they should have left out reactance or made it capacitive reactance.
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Old 04-04-2019, 12:46 PM   #6
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I would have known the answer to this at one time but now I think more about kinking pipe and yanking wire (the real world).
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Old 04-04-2019, 01:35 PM   #7
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I would have known the answer to this at one time but now I think more about kinking pipe and yanking wire (the real world).

Hmmmm.... Getting the electricity into your wire depends quite heavily on dealing with capacitance and inductance. It's so real that telegraph signals couldn't be transmitted more than a few miles until Oliver Heavyside figured out what was going on. Electric transmission lines were ringing with wild oscillations and causing induced voltages that burned out generators and shocked me operating the central stations.
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Old 04-04-2019, 01:42 PM   #8
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Hmmmm.... Getting the electricity into your wire depends quite heavily on dealing with capacitance and inductance. It's so real that telegraph signals couldn't be transmitted more than a few miles until Oliver Heavyside figured out what was going on. Electric transmission lines were ringing with wild oscillations and causing induced voltages that burned out generators and shocked me operating the central stations.
And what percentage of master electricians are concerned with this on a regular or irregular basis. was his point and I agree?
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Old 04-04-2019, 01:55 PM   #9
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and what percentage of master electricians are concerned with this on a regular or irregular basis. Was his point and i agree?
11.67%
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Old 04-04-2019, 04:39 PM   #10
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Im very good at the work i do and know as a master electrician i should quote this stuff in my sleep but somewhere in the last 25 years the rest of my life took up the space in my brain where it used to be . Now its mostly about the Benjamin's. Thanks for your help!
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Old 04-04-2019, 08:19 PM   #11
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11.67%
More like, 67%
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