BK meter, One old and one new six volt battery

Code Number: 5E40.75

Demo Title: Internal Resistance of a Battery

Condition: Excellent

Principle: Internal resistance of a battery, peak power of battery

Area of Study: Electricity & Magnetism

Equipment:

BK meter, One old and one new six volt battery.

Procedure:

As batteries age, their internal resistance goes up and power output goes down accordingly. On occasion a battery can be found that shows 6 volts but has no current output due to a very large internal resistance.

References:

Adam Niculescu, Peter Martin, "Making and Evaluating an Electrical Battery", TPT, Vol. 44, # 6, p. 343, Sept. 2006.

5E40.75 - Internal Resistance of a Battery

Disclaimer

These demonstrations are provided only for illustrative use by persons affiliated with The University of Iowa and only under the direction of a trained instructor or physicist. The University of Iowa is not responsible for demonstrations performed by those using their own 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), including 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.