Electromagnetics | 6-6: Magnetic Field of a Coil | Purdue University

Understanding the magnetic field generated by a solenoid is made simple in this compelling video by Professor Michael Melloch of Purdue University's School of Electrical and Computer Engineering. He carefully illustrates how the magnetic field is strong inside the solenoid but rapidly disperses once it exits the coil. This is due to the field needing to wrap around and re-enter the other end of the coil, causing it to weaken outside the solenoid. Using Ampere's Circuit Law, Professor Melloch guides viewers through the detailed process of calculating this magnetic field. This involves a series of path integrations both inside and outside the coil, and taking into account the number of turns in the coil and the current passing through it.

Interested in more learning experiences like this one? Subscribe to Purdue University Online's channel for wholesome educational content from esteemed professors like Dr. Melloch. This video is part of his course, 'Electromagnetics'.

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