Recent content by rooks

Ok, then where is the threshold? When does a coil become too long to use the 2nd equation? When does a solenoid become too short to use the 1st equation? Also, I meant why does the length matter and make the equation different?

Hi!, I have a question for you geniuses (geniusi?) Why are there two different equations to find the magnetic field of a solenoid and a coil with multiple turns? (According to my textbook) The equations for each are Solenoid: Coil with multiple turns: Why are they different? Is there a...