One long solenoid is placed inside another solenoid. Both solenoids have the same length and the same

Question:

One long solenoid is placed inside another solenoid. Both solenoids have the same length and the same number of turns of wire, but the outer solenoid has twice the diameter of the inner solenoid. Each solenoid carries the same current, but the two currents are in opposite directions, as shown in Figure Q24.14. What is the magnetic field at the center of the inner solenoid? Explain. image text in transcribed