I understand that if we have a solenoid with AC current running through it, it will create a changing magnetic flux.
Suppose now we place the solenoid in the centre of the a single loop wire, according to faraday's law of induction, that single loop wire will have a emf, and hence a current running through it.
Question i have is, according to ampere's law, there is no magnetic field outside the solenoid. So, how does the single loop wire knows that there is a changing magnetic flux in its centre and respond to it?
Also, if i keep increasing the size of the loop (i know Area of loop doesn't matter affect emf, only the flux from the solenoid does), will the emf/ current eventually drop to zero? Logic tells me it does, of course.
Any help will be greatly appreciated.