There are no electrical connectors on the brush or the base unit (which plugs in to the wall), so how does current flow and charge the batteries in the toothbrush?
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not magic – inductive charging.
http://home.howstuffworks.com/question292.htm
#1 by Kev D on March 5, 2010 - 1:18 pm
Magic!
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#2 by Matt.S on March 5, 2010 - 1:46 pm
they either have batteries or they sit on a recharging unit.
no small nuclear reactors or anythin. electricity can pass through many materials and the base is probably made so that electricity can go through it easily
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#3 by benny_boi85 on March 5, 2010 - 2:33 pm
not magic – inductive charging.
http://home.howstuffworks.com/question292.htm
References :
#4 by lonelymaytagguy on March 5, 2010 - 2:48 pm
A transformer is an electrical component used to change ("transform"), alternating current from one voltage to another. It’s just 2 coils of wire wound around an (optional) iron core.
In an electric toothbrush, one coil is in the charging base, and the other in the toothbrush itself. When the brush is on the stand, the transformer is complete, and the current which is induced into the toothbrush, is changed to direct current and charges a battery that’s inside.
The battery powers a motor which wiggles or spins the brush, and your teeth get all shiny, clean, and beautiful!
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