The magnetic field B inside a long ideal solenoid is independent of what:( the current, the core material, the spacing of the windings, the cross-sectional area of the solenoid, the direction of the current

Due to the bar magnet being pulled away from the solenoid, the included pole that is created at location I is a _____ pole. The electron flowing through the galvanometer would be ____.

Can you help with subquestions 9a and 9b  9a. A very long solenoid with a circular cross section and radius r= 5.10 cm with n= 1.10E+4 turns/m has a magnetic energy density uB= 6.60 mJ/m3. What is the current in the solenoid? 9b. What is the total energy stored in the solenoid if its length is 0.620 meters? (Neglect end effects.) This is not and will not be graded

A certain superconducting magnet in the form of a solenoid of length 0.490 m can generate a magnetic field of 9.20 T in its core when its coils carry a current of 80 A. Find the number of turns in the solenoid.

A tightly-wound toroidal solenoid has a central radius (the radius midway between the inner and outer radii of the toroid) equal to R, a cross-sectional radius equal to b, N turns, and carries a current of I. In the limit as R approaches infinity, the magnetic field strength inside the toroid becomes: undefined equal to the magnetic field of an infinite solenoid with radius b equal to the magnetic field of an infinite solenoid with radius R zero