Make: Electronics – Chp 1 Exercise 2

Exercise Two “Shorting a Battery” exposes the reader to the concept of voltage, current, and resistance.  The end result is non-eventful as there are no visual effects of the short. However, the battery itself becomes very warm.  This is a result of increased current and electrical flow through the wires and the electrolytic properties of the battery.Experiment_Two

A second exercise involves placing a 3-amp-fuse in-between the battery terminals.  The idea behind this experiment is to demonstrate the purpose of a fuse.  When the current (amperage) increases past the tolerance of the fuse, it will blow the fuse filament creating an open circuit.
Experiment_Two_b
Of note, I was unable to successfully blow the fuse after several tries.  Using my DMM I observed that  the average voltage for several batteries were around 1.6v.  However, after a few more tries and with a battery producing a voltage a little higher than 1.6v, the fuse finally blew.
Experiment_Two_a
Overall, experiment two was interesting enough to hold my attention.  The books continues to drive home basic electronic fundamentals which is great for beginners.  Also, there is a decent treatment of basic voltage and amperage information related to the experiments in addition to coverage on direct and alternating current.


Required Components:
1.5 volt AA Battery
Single Battery Carrier
3 amp fuse

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