Question: A solenoid with a radius R=5cm is made of a long piece of wire with a radius of 2mm, length L= 10m, and resistivity= 1.7 x 10-8.
Question 1: Find the magnetic field at the center of solenoid if it is connected to a battery having an emf=20 V.
Explain the equations and steps are used to get the answer. Thank you!