Ampere's Law & Magnetic Field of a Solenoid - Physics & Electromagnetism

This physics video tutorial provides a basic introduction into ampere's law and explains how to use ampere's law to derive the formula to calculate the magnetic field of a wire and the magnetic field of a solenoid. This video on electromagnetism contains 1 practice problem explaining how to calculate the magnetic field of a solenoid given the electric current and the number of turns in the solenoid.

Magnetic Force on a Current Carrying Wire:

Magnetic Force on a Moving Charge:

The Homopolar Motor:

The Lorentz Force:

Magnetic Field of a Current Carrying Wire:

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Magnetic Sensors - The Reed Switch:

Magnetic Force Between Two Parallel Wires:

Magnetic Field of a Toroidal Solenoid:

Magnetic Field of a Moving Charge:

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Torque on a Loop - Magnetic Dipole Moment:

The Hall Effect:

Magnetic Flux:

Faraday's Law of Electromagnetic Induction:

Lenz's Law - Induced Current:

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Final Exams and Video Playlists:

Full-Length Videos and Worksheets:

[paydaygh]

It’s 1 hour and 36 minutes until my final exam, and I just now learned that two loops doubles the i enclosed, and that’s why the B formula can be derived for a solenoid

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[johnjordan]

Oh my god, after stressing how in the world can a solenoid's magnetic field can be explained, without just memorizing formulas, I finally understand it comprehensively

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[AjayKumar-jlsr]

How about taking a circular loop inside the solenoid? How does ampere's law explains it?(since inclosed current inside is 0 but we know B is not zero)

[jcamargo]

I am familiar with vector calculus but this kind of stuff is still amazing. Solenoids are a magnific 'exploit', by bending the wire we are shaping the magnetic field to concentrate in the center.

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