A long solenoid produces a field at its center. An identical solenoid is placed end to end with the first (common axis). The magnetic field at the center of the 1st solenoid is now

Question

Quizplus · Accepted Answer

The magnetic field inside a solenoid is determined by its current, number of turns per unit length, and the permeability of the medium inside it. Placing another identical solenoid end to end with the first does not change these parameters for the first solenoid, so the magnetic field at the center of the first solenoid remains the same.

A Long Solenoid Produces a Field at Its Center