THE ANSWER IS CASE 1 AND 3 BUT HOW... The two solenoids are adjacent, end-to-end

Question

THE ANSWER IS CASE 1 AND 3 BUT HOW...

The two solenoids are adjacent, end-to-end, and share a common axis. The left circuit includes a battery and a switch, along with the solenoid on the left. The right circuit includes only an ammeter along with the solenoid on the right. In which of the following cases will there be a current in the ammeter? the switch has just been closed the switch has been closed a long time the switch has just been opened the switch has been opened a long time In cases (1) and (3) only. In cases (1) and (2) only. In cases (1), (2), and (3) only. In none of the cases In case (2) only.

Explanation / Answer

this is because when the switch has just been closed there are changes in the electric field due to wire that induce current then the electric field becomes constant when the switch has just been closed, again electric field changes from a value to zero which again induces current

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