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Bozeman Science
Electromagnetic Induction
In this video Paul Andersen explains how electromagnetic induction occurs when the magnetic flux of an object changes. The magnetic flux is product of the surface area perpendicular to the magnetic field and the magnetic field strength....
Visual Learning Systems
Introduction to Galvanometers
In this video, we explore the galvanometer, an instrument that uses electromagnetism to measure small currents. Galvanometers are essential tools used in ohmmeters and voltmeters. This video is part of the 11-part series, Electromagnetism.
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Wheatstone Bridge
This nugget explains the construction and working of a Wheatstone bridge to calculate an unknown resistance in a closed loop.
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Potentiometer
This nugget explains the construction, mathematical derivations and applications of a potentiometer device.
Visual Learning Systems
Magnets and Electromagnetism: Electricity From Magnets
Upon viewing the Magnets and Electromagnets video series, students will be able to do the following: Define a magnet as a material that attracts iron and materials containing iron. Explain that magnets have a north pole and a south pole...
Khan Academy
Khan Academy: Electrolyte Test (Pure Water vs. Vinegar)
We attach our galvanometer to a piece of copper and zinc. Then we submerge the metals in pure water and vinegar. What is the difference? Watch this visual demonstration to answer this question. [1:22]
Khan Academy
Khan Academy: Electrolyte (Temperature Test)
Watch as we experiment with hot vs. cold vinegar as our electrolyte. Does the deflection in our galvanometer depend on temperature? [1:36]