5K10.20 - Galvanometer with Coil and Power Supply


Completed Demo Setup
Completed Demo Setup



Code: 5K10.20


Demo Title: Galvanometer with Coil and Power Supply


Subject: Induced Currents and Forces


Description:
This demo explains how electric currents are induced in coils to show electromagnetic flux and how it changes with the movement of a magnetic bar.


Procedure:

Start by showing the students the coil connected to the Galvanometer. Show the students that the Galvanometer has a needle that sits at rest. Tell the students to observe the Galvanometer as you demonstrate the rest of the demo. Now, using the magnetic bar, bring the bar closer to the coil plugged into the Galvanometer. Show the students how the Galvanometer reading changes as you moves the magnetic bar. Show how the Galvanometer goes back to rest as you stop moving the bar. Move the bar slowly and then faster to show how the reading moves slower and faster in relation to the bar. This is because the Galvanometer observes the moving magnetic flux of the coils. When the magnet moves, it induces a magnetic flux that moves with the bar. For this next part of the demo, using the D/C power box and the coil plugged into it, show how the Galvanometer reading changes as you bring the other coil close to the original coil.


Video URL:


Disclaimer: These demonstrations are provided only for illustrative use by persons affiliated with Rutgers University and only under the direction of a trained instructor or physicist. Rutgers University is not responsible for any demonstrations performed by those using their own or others equipment, or who choose to use this reference material for their own purpose. The demonstrations included here are within the public domain and can be found in materials contained in libraries, bookstores, and through electronic sources. Performing all or any portion of any of these demonstrations, with or without revisions not depicted here, entails inherent risks. These risks include, without limitation, bodily injury (and possibly death), risks to health that may be temporary or permanent and that may exacerbate a pre-existing medical condition, and property loss or damage. Anyone performing any part of these demonstrations, even with revisions, knowingly and voluntarily assumes all risks associated with them.


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