Find Field and Direction in Coaxial Coils

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To find the magnetic field and direction inside coaxial coils, the inner coil with 3.0A and 500 loops generates a field of 0.0188T, while the outer coil with 10A and 5000 loops produces a field of 0.628T. Since the currents flow in opposite directions, the fields must be subtracted. The resulting magnetic field at the center is approximately 0.61T. The calculations appear to be correct based on the given parameters.
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Homework Statement



Find the field and direction inside a pair of coaxial coils. The inner coil carries 3.0A, has 500 loops and is 10cm long. The outer coil carries 10A, has 5000 loops and is 10cm long. Find the field at the center

Thats the questions, now I don't have trouble working out the numbers (At least I hope I don't). But what I'm wondering is, in the questions, the currents are going in opposite directions, one CW, one CCW. So does that mean that at the end I just subtract them?? or does that not work??

I got, the 3.0A coil creates 0.0188T. And the 10A coil creates 0.628T. So that's ~=0.61T. I hope that's right. lol
 
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Yes, if the currents are in opposite directions, then you subtract them. It looks ok to me.
 
hey thanks a bunch.
 

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