5E40.75 - Internal Resistance of a 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.

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