Hi ,so am currently doing homework , and was wondering if anyone could tell me if i have done my calculations correctly ,because am not 100% sure . Thank you

 

When calculating the current through the coil at 50hz what happened to the wire resistance?

 

Hi ,so am currently doing homework , and was wondering if anyone could tell me if i have done my calculations correctly ,because am not 100% sure . Thank you

Again i get results very very close to yours with only a very slight difference. I get:
3.94 amps and L=0.185 Henries.
I always wait until the end to round though.

 

In the second test you are actually measuring the total impedance of the coil. You then need to work out the part that is just the inductive reactance. Then from this calculate the inductance.

Les.

 

In the second test you are actually measuring the total impedance of the coil. You then need to work out the part that is just the inductive reactance. Then from this calculate the inductance.

Les.

So how far off are you saying he is, because i got the same answer or very very close anyway.

 

I have not bothered to do all the calculations. BUT the total impedance with 2 amps at 60 hz is 70 ohms. (Not 70.17)
He then needs to remove the effect the 5 ohms resistance makes to get the component that is just inductive reactance.
He has treated the 70 ohms as just the inductive reactance then added in the the effect of the 5 ohm resistance.
Also when doing the 230 volt calculation he has not added in the effect of the 5 ohm resistance to the inductive reactance as pointed out by RBR1317.

Les.