Question

Okay basic question about transformers. If you have a solenoid with primary and secondary windings will your magnetic field generated inside the solenoid only depend on the current from the primary winding or both the primary and secondary ??

Answer 1

The current from the secondary is induced because of the field from the primary. I am using amperes law to solve for the B-field inside and I feel like the current enclosed should be both the primary and secondary current added together.

Answer 2

I think If you take a loop in primary and attach a surface to the loop . Only the primary current will penetrate the surface, so in Ampere's law you should have only primary current.

Answer 3

But I'm not 100 % sure, let's see what other users say

Answer 4

Yeah I cannot remember I want to add both currents for the total current enclosed but I feel like that gives the wrong expression for the B-field

Answer 5

yes, include just primary current

Answer 6

Okay thanks!

Answer 7

it depends only on the primary current and the flux linked with the secodary coil due to it creates current in the secondary coil so magnetic field is created due to the primary current